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All questions of November Week 4 for Class 6 Exam
On a vertical number line, where are the positive numbers placed?- a)To the right of 0.
- b)To the left of 0.
- c)Above 0.
- d)Below zero.
Correct answer is option 'C'. Can you explain this answer?
On a vertical number line, where are the positive numbers placed?
a)
To the right of 0.
b)
To the left of 0.
c)
Above 0.
d)
Below zero.
|
Kunal Mehta answered |
On a vertical number line, positive numbers are located above zero. As we look upward on a vertical number line, the values of the numbers increase. On a vertical number line, negative numbers are located above zero.
Which planet is known as the "Red Planet"?- a)Venus
- b)Mars
- c)Mercury
- d)Jupiter
Correct answer is option 'B'. Can you explain this answer?
Which planet is known as the "Red Planet"?
a)
Venus
b)
Mars
c)
Mercury
d)
Jupiter
|
Shiksha Academy answered |
Mars is called the "Red Planet" because its surface looks red due to the presence of iron oxide (rust). This gives it a reddish appearance when seen from Earth.
The predecessor of −16 is- a)−15
- b)−17
- c)15
- d)17
Correct answer is option 'B'. Can you explain this answer?
The predecessor of −16 is
a)
−15
b)
−17
c)
15
d)
17
|
Dr Manju Sen answered |
To find the predecessor of a number we move from right to the left on the number line
And , −17 lies on left side of −16
Hence, −17 is the predecessor of −16
Option (B) is the correct answer
Which of the following statements is CORRECT?
Statement 1: When a positive integer and a negative integer are added, we always get a negative integer.
Statement 2: When two negative integers are added, we get a positive integer.- a)Only Statement 1
- b)Only Statement 2
- c)Both Statement 1 and Statement 2
- d)Neither Statement 1 nor Statement 2
Correct answer is option 'D'. Can you explain this answer?
Which of the following statements is CORRECT?
Statement 1: When a positive integer and a negative integer are added, we always get a negative integer.
Statement 2: When two negative integers are added, we get a positive integer.
Statement 1: When a positive integer and a negative integer are added, we always get a negative integer.
Statement 2: When two negative integers are added, we get a positive integer.
a)
Only Statement 1
b)
Only Statement 2
c)
Both Statement 1 and Statement 2
d)
Neither Statement 1 nor Statement 2
|
Devika Basak answered |
Understanding the Statements
To determine the correctness of the given statements, let's analyze them one by one.
Statement 1: Positive and Negative Integer Addition
- When a positive integer (e.g., +5) and a negative integer (e.g., -3) are added, the result depends on their absolute values.
- If the positive integer is larger than the negative integer, the result will be positive (e.g., +5 + -3 = +2).
- If the negative integer is larger, the result will be negative (e.g., +3 + -5 = -2).
- Thus, Statement 1 is incorrect because we do not always get a negative integer.
Statement 2: Adding Two Negative Integers
- When two negative integers (e.g., -2 and -3) are added, the result is always negative.
- For example, -2 + -3 = -5.
- This means that the sum of two negative integers will never yield a positive integer.
- Therefore, Statement 2 is also incorrect.
Conclusion
- Both statements are incorrect based on the definitions of adding positive and negative integers.
- Thus, the correct answer is option 'D': Neither Statement 1 nor Statement 2 is correct.
Understanding these principles is essential for mastering integer operations in mathematics.
To determine the correctness of the given statements, let's analyze them one by one.
Statement 1: Positive and Negative Integer Addition
- When a positive integer (e.g., +5) and a negative integer (e.g., -3) are added, the result depends on their absolute values.
- If the positive integer is larger than the negative integer, the result will be positive (e.g., +5 + -3 = +2).
- If the negative integer is larger, the result will be negative (e.g., +3 + -5 = -2).
- Thus, Statement 1 is incorrect because we do not always get a negative integer.
Statement 2: Adding Two Negative Integers
- When two negative integers (e.g., -2 and -3) are added, the result is always negative.
- For example, -2 + -3 = -5.
- This means that the sum of two negative integers will never yield a positive integer.
- Therefore, Statement 2 is also incorrect.
Conclusion
- Both statements are incorrect based on the definitions of adding positive and negative integers.
- Thus, the correct answer is option 'D': Neither Statement 1 nor Statement 2 is correct.
Understanding these principles is essential for mastering integer operations in mathematics.
The additive inverse of a negative integer- a)is always negative
- b)is always positive
- c)is the same integer
- d)zero
Correct answer is option 'B'. Can you explain this answer?
The additive inverse of a negative integer
a)
is always negative
b)
is always positive
c)
is the same integer
d)
zero
|
Aniket Mukherjee answered |
Understanding Additive Inverse
The additive inverse of a number is what you add to that number to get zero. For any integer 'x', the additive inverse is '-x'.
Negative Integer Example
Consider a negative integer, for example, -5. The additive inverse of -5 is calculated as follows:
- Additive Inverse = -(-5) = 5
Thus, the additive inverse of a negative integer is always a positive integer.
Explanation of Options
Let's analyze the given options:
- a) Is always negative
- This is incorrect because the additive inverse of a negative integer is positive.
- b) Is always positive
- This is the correct answer. The additive inverse of any negative integer results in a positive integer.
- c) Is the same integer
- This option is incorrect. The additive inverse changes the sign, so it cannot be the same integer.
- d) Zero
- This is also incorrect. The additive inverse of a negative integer is not zero but a positive integer.
Conclusion
In conclusion, the additive inverse of a negative integer is always positive. This means that if you have a negative number and you take its additive inverse, you will always end up with a positive number, ensuring the sum equals zero when added together.
The additive inverse of a number is what you add to that number to get zero. For any integer 'x', the additive inverse is '-x'.
Negative Integer Example
Consider a negative integer, for example, -5. The additive inverse of -5 is calculated as follows:
- Additive Inverse = -(-5) = 5
Thus, the additive inverse of a negative integer is always a positive integer.
Explanation of Options
Let's analyze the given options:
- a) Is always negative
- This is incorrect because the additive inverse of a negative integer is positive.
- b) Is always positive
- This is the correct answer. The additive inverse of any negative integer results in a positive integer.
- c) Is the same integer
- This option is incorrect. The additive inverse changes the sign, so it cannot be the same integer.
- d) Zero
- This is also incorrect. The additive inverse of a negative integer is not zero but a positive integer.
Conclusion
In conclusion, the additive inverse of a negative integer is always positive. This means that if you have a negative number and you take its additive inverse, you will always end up with a positive number, ensuring the sum equals zero when added together.
What factor primarily causes light pollution, making it difficult to observe stars in urban areas?- a)Excessive artificial light
- b)Cloudy weather
- c)High altitude
- d)Presence of mountains
Correct answer is option 'A'. Can you explain this answer?
a)
Excessive artificial light
b)
Cloudy weather
c)
High altitude
d)
Presence of mountains
|
Torcia Education answered |
Excessive artificial light from urban areas causes light pollution, making it difficult to see stars.
What characteristic primarily distinguishes stars from planets?- a)Stars emit their own light through nuclear fusion, while planets reflect the Sun's light.
- b)Stars are always larger than planets.
- c)Stars orbit planets, while planets orbit stars.
- d)Stars have moons, but planets do not.
Correct answer is option 'A'. Can you explain this answer?
a)
Stars emit their own light through nuclear fusion, while planets reflect the Sun's light.
b)
Stars are always larger than planets.
c)
Stars orbit planets, while planets orbit stars.
d)
Stars have moons, but planets do not.
|
Keystone Instructors answered |
Stars emit their own light through nuclear fusion, while planets do not emit their own light and only reflect the Sun's light.
Which sector involves activities like farming and fishing?- a)Tertiary sector
- b)Secondary sector
- c)Primary sector
- d)Not an economic sector
Correct answer is option 'C'. Can you explain this answer?
a)
Tertiary sector
b)
Secondary sector
c)
Primary sector
d)
Not an economic sector
|
EduRev Class 6 answered |
Farming and fishing are activities in the primary sector. The primary sector is focused on extracting or collecting natural resources directly from the environment.
Which activity falls under the secondary sector?- a)Operating a cash register at a store
- b)Repairing a washing machine
- c)Processing grain into flour
- d)Driving a truck
Correct answer is option 'C'. Can you explain this answer?
a)
Operating a cash register at a store
b)
Repairing a washing machine
c)
Processing grain into flour
d)
Driving a truck
|
|
Torcia Education answered |
Processing grain into flour is a secondary sector activity. The secondary sector involves transforming raw materials from the primary sector into finished products. In this case, milling grain into flour takes a raw agricultural product and processes it into something new that can be consumed or used.
How do the farmers benefit from forming a cooperative?- a)They start growing more crops.
- b)They gain control over milk production and sale.
- c)They begin manufacturing electronic devices.
- d)They start teaching knitting to women.
Correct answer is option 'B'. Can you explain this answer?
How do the farmers benefit from forming a cooperative?
a)
They start growing more crops.
b)
They gain control over milk production and sale.
c)
They begin manufacturing electronic devices.
d)
They start teaching knitting to women.
|
|
Dr Manju Sen answered |
The farmers benefited from forming a cooperative by gaining control over the milk production and sale. This allowed them to manage the entire process themselves, from collection to distribution, and increased their income by eliminating the need for middlemen.
Number of even numbers between 58 and 80 is - a)10
- b)11
- c)12
- d)13
Correct answer is option 'A'. Can you explain this answer?
Number of even numbers between 58 and 80 is
a)
10
b)
11
c)
12
d)
13
|
Indu Gupta answered |
Option A is right
If a number side to be an even number is must be divisible by 22. Therefore the even number between 5858 and 8080 are
60, 62, 64, 66, 68, 70, 72, 74, 76, 78.
So, there are 1010 even numbers between 58 and 80
Which constellation is easily identified by the three stars in a row known as Orion's Belt?- a)Ursa Major
- b)Ursa Minor
- c)Cassiopeia
- d)Orion
Correct answer is option 'D'. Can you explain this answer?
a)
Ursa Major
b)
Ursa Minor
c)
Cassiopeia
d)
Orion
|
|
Keystone Instructors answered |
Orion is easily identified by the three stars in a row that form Orion's Belt.
What is an example of a primary sector economic activity?- a)Manufacturing cars
- b)Teaching computer skills
- c)Farming crops
- d)Repairing refrigerators
Correct answer is option 'C'. Can you explain this answer?
a)
Manufacturing cars
b)
Teaching computer skills
c)
Farming crops
d)
Repairing refrigerators
|
|
EduRev Class 6 answered |
Farming crops is an example of a primary sector economic activity. The primary sector involves activities that directly use natural resources to produce goods. In this case, farming directly utilizes land and soil to grow crops, making it a primary activity. This sector includes other activities like fishing and forestry.
Calculate: 9 − (−6)- a)3
- b)−3
- c)15
- d)−15
Correct answer is option 'C'. Can you explain this answer?
Calculate:
9 − (−6)
a)
3
b)
−3
c)
15
d)
−15
|
Shivam Chakraborty answered |
Understanding the Expression
To solve the expression 9 - (-6), we need to carefully evaluate the subtraction of a negative number.
Step-by-Step Calculation
- Identify the Operation: The expression involves subtracting a negative number.
- Rule of Subtracting Negatives: When you subtract a negative number, it is equivalent to adding the positive version of that number.
- Rewrite the Expression: Thus, we can rewrite the expression 9 - (-6) as 9 + 6.
Performing the Addition
- Calculate the Sum:
- 9 + 6 = 15
Conclusion
- The final result of the expression 9 - (-6) is 15.
- Therefore, the correct answer is option 'C', which is 15.
This logical breakdown helps us understand why the answer is 15, making it clear that subtracting a negative number effectively increases the total.
To solve the expression 9 - (-6), we need to carefully evaluate the subtraction of a negative number.
Step-by-Step Calculation
- Identify the Operation: The expression involves subtracting a negative number.
- Rule of Subtracting Negatives: When you subtract a negative number, it is equivalent to adding the positive version of that number.
- Rewrite the Expression: Thus, we can rewrite the expression 9 - (-6) as 9 + 6.
Performing the Addition
- Calculate the Sum:
- 9 + 6 = 15
Conclusion
- The final result of the expression 9 - (-6) is 15.
- Therefore, the correct answer is option 'C', which is 15.
This logical breakdown helps us understand why the answer is 15, making it clear that subtracting a negative number effectively increases the total.
Which type of celestial object is characterized by its composition of dust, ice, and gases, forming a glowing coma and tail when near the Sun?- a)Asteroid
- b)Moon
- c)Comet
- d)Dwarf planet
Correct answer is option 'C'. Can you explain this answer?
a)
Asteroid
b)
Moon
c)
Comet
d)
Dwarf planet
|
Aditya Menon answered |
Understanding Comets
Comets are fascinating celestial objects that capture our imagination with their stunning appearances and unique characteristics.
Composition of Comets
- Comets are primarily made up of:
- Dust
- Ice
- Gases
These materials are often described as "dirty snowballs" because of their icy cores mixed with dust.
Formation of the Coma
- As a comet approaches the Sun, the heat causes the ice to vaporize.
- This process creates a glowing envelope of gas and dust around the nucleus called the coma.
- The coma can be quite large, sometimes extending thousands of kilometers into space.
The Tail of the Comet
- The solar wind and radiation pressure from the Sun push the gas and dust away from the coma, forming a tail.
- This tail can stretch millions of kilometers and is always directed away from the Sun, regardless of the comet's direction of travel.
Differences from Other Celestial Objects
- Unlike asteroids, which are rocky and mostly found in the asteroid belt, comets are icy bodies that originate from the outer regions of the solar system.
- Moons are natural satellites orbiting planets, while dwarf planets are celestial bodies that are not classified as full-fledged planets but are larger than asteroids.
In summary, the correct answer is C) Comet, as it is the only object in the options that forms a coma and tail when near the Sun due to its unique composition of dust, ice, and gases.
Comets are fascinating celestial objects that capture our imagination with their stunning appearances and unique characteristics.
Composition of Comets
- Comets are primarily made up of:
- Dust
- Ice
- Gases
These materials are often described as "dirty snowballs" because of their icy cores mixed with dust.
Formation of the Coma
- As a comet approaches the Sun, the heat causes the ice to vaporize.
- This process creates a glowing envelope of gas and dust around the nucleus called the coma.
- The coma can be quite large, sometimes extending thousands of kilometers into space.
The Tail of the Comet
- The solar wind and radiation pressure from the Sun push the gas and dust away from the coma, forming a tail.
- This tail can stretch millions of kilometers and is always directed away from the Sun, regardless of the comet's direction of travel.
Differences from Other Celestial Objects
- Unlike asteroids, which are rocky and mostly found in the asteroid belt, comets are icy bodies that originate from the outer regions of the solar system.
- Moons are natural satellites orbiting planets, while dwarf planets are celestial bodies that are not classified as full-fledged planets but are larger than asteroids.
In summary, the correct answer is C) Comet, as it is the only object in the options that forms a coma and tail when near the Sun due to its unique composition of dust, ice, and gases.
Which activity is an example of a tertiary sector job?- a)Extracting coal from a mine
- b)Manufacturing electronic devices
- c)Selling fruits and vegetables
- d)Cultivating crops on a farm
Correct answer is option 'C'. Can you explain this answer?
a)
Extracting coal from a mine
b)
Manufacturing electronic devices
c)
Selling fruits and vegetables
d)
Cultivating crops on a farm
|
Rahul Kumar answered |
Selling fruits and vegetables is an example of a tertiary sector job. The tertiary sector involves providing services, and selling goods in a market is a service that supports both primary (growing the fruits and vegetables) and secondary sectors (processing or packaging them).
What type of economic activity is involved in driving a truck to transport goods?- a)Primary sector
- b)Secondary sector
- c)Tertiary sector
- d)Not an economic activity
Correct answer is option 'C'. Can you explain this answer?
a)
Primary sector
b)
Secondary sector
c)
Tertiary sector
d)
Not an economic activity
|
|
EduRev Class 6 answered |
Driving a truck to transport goods is a tertiary sector activity. The tertiary sector includes services that support other sectors, such as transportation, which is crucial for moving products from one place to another.
What is an example of a secondary sector activity?- a)Operating a retail store
- b)Manufacturing clothes from cotton
- c)Providing medical services
- d)Teaching at a school
Correct answer is option 'B'. Can you explain this answer?
a)
Operating a retail store
b)
Manufacturing clothes from cotton
c)
Providing medical services
d)
Teaching at a school
|
Raghav Dasgupta answered |
Understanding the Secondary Sector
The secondary sector is one of the three main sectors of the economy, alongside the primary and tertiary sectors. It focuses on transforming raw materials into finished goods.
Examples of Economic Sectors
- Primary Sector: Involves extracting natural resources, such as farming, fishing, and mining.
- Tertiary Sector: Engages in providing services, such as retail, healthcare, and education.
Why Option B is Correct
- Manufacturing Process: Option B, which is "Manufacturing clothes from cotton," falls under the secondary sector because it involves converting raw materials (cotton) into a finished product (clothes).
- Value Addition: The secondary sector is characterized by value addition. In this case, the cotton is transformed through various manufacturing processes—spinning, weaving, and sewing—into garments that can be sold to consumers.
Analysis of Other Options
- Option A: Operating a Retail Store: This is a tertiary sector activity as it involves selling finished goods to consumers.
- Option C: Providing Medical Services: This also belongs to the tertiary sector, focusing on offering healthcare services.
- Option D: Teaching at a School: Similar to the previous options, this is a service activity in the tertiary sector.
Conclusion
In summary, option B uniquely represents the secondary sector by emphasizing the transformation of raw materials into usable products, highlighting the critical role of manufacturing in the economy.
The secondary sector is one of the three main sectors of the economy, alongside the primary and tertiary sectors. It focuses on transforming raw materials into finished goods.
Examples of Economic Sectors
- Primary Sector: Involves extracting natural resources, such as farming, fishing, and mining.
- Tertiary Sector: Engages in providing services, such as retail, healthcare, and education.
Why Option B is Correct
- Manufacturing Process: Option B, which is "Manufacturing clothes from cotton," falls under the secondary sector because it involves converting raw materials (cotton) into a finished product (clothes).
- Value Addition: The secondary sector is characterized by value addition. In this case, the cotton is transformed through various manufacturing processes—spinning, weaving, and sewing—into garments that can be sold to consumers.
Analysis of Other Options
- Option A: Operating a Retail Store: This is a tertiary sector activity as it involves selling finished goods to consumers.
- Option C: Providing Medical Services: This also belongs to the tertiary sector, focusing on offering healthcare services.
- Option D: Teaching at a School: Similar to the previous options, this is a service activity in the tertiary sector.
Conclusion
In summary, option B uniquely represents the secondary sector by emphasizing the transformation of raw materials into usable products, highlighting the critical role of manufacturing in the economy.
What is the main role of the tertiary sector?- a)Extracting natural resources
- b)Manufacturing goods from raw materials
- c)Providing services to support other sectors
- d)Growing crops and raising livestock
Correct answer is option 'C'. Can you explain this answer?
a)
Extracting natural resources
b)
Manufacturing goods from raw materials
c)
Providing services to support other sectors
d)
Growing crops and raising livestock
|
|
Torcia Education answered |
The main role of the tertiary sector is to provide services that support both the primary and secondary sectors. This includes activities such as transportation, banking, and repair services. For example, a truck driver transporting goods or a technician repairing a phone are both part of the tertiary sector.
What does AMUL do with the milk it collects?- a)It sells the milk in local markets.
- b)It makes furniture from the milk.
- c)It uses milk to manufacture cars.
- d)It processes milk into products like butter and cheese.
Correct answer is option 'D'. Can you explain this answer?
a)
It sells the milk in local markets.
b)
It makes furniture from the milk.
c)
It uses milk to manufacture cars.
d)
It processes milk into products like butter and cheese.
|
|
Rahul Kumar answered |
AMUL processes milk into products like butter and cheese. This is a secondary sector activity where raw milk is transformed into different products. The cooperative then sells these processed products through various retail and distribution channels, involving tertiary sector activities.
What phenomenon is driven by the Sun and involves the continuous movement of water on, above, and below the surface of the Earth?- a)Volcanic eruptions
- b)Water cycle
- c)Plate tectonics
- d)Lunar phases
Correct answer is option 'B'. Can you explain this answer?
What phenomenon is driven by the Sun and involves the continuous movement of water on, above, and below the surface of the Earth?
a)
Volcanic eruptions
b)
Water cycle
c)
Plate tectonics
d)
Lunar phases
|
Preethi Dasgupta answered |
Understanding the Water Cycle
The phenomenon driven by the Sun that involves the continuous movement of water on, above, and below the surface of the Earth is known as the water cycle.
Key Stages of the Water Cycle:
- Evaporation:
- Water from oceans, rivers, and lakes heats up due to the Sun's energy and transforms into water vapor, rising into the atmosphere.
- Condensation:
- As the water vapor rises, it cools and condenses to form clouds. This process is crucial for the formation of precipitation.
- Precipitation:
- When the clouds become heavy with water droplets, they release this water back to the Earth in the form of rain, snow, sleet, or hail.
- Collection:
- The precipitation collects in bodies of water like rivers, lakes, and oceans, where the cycle begins anew. Some water also seeps into the ground, replenishing groundwater supplies.
Importance of the Water Cycle:
- Supports Life:
- The water cycle is essential for all living organisms. It provides fresh water for drinking, agriculture, and sanitation.
- Climate Regulation:
- It plays a crucial role in regulating the Earth's climate by distributing heat and moisture around the planet.
- Ecosystem Balance:
- The cycle maintains the balance of ecosystems by ensuring that plants and animals have access to water.
In summary, the water cycle is a vital system driven by solar energy, ensuring the continuous movement and recycling of water, supporting life, and regulating climate.
The phenomenon driven by the Sun that involves the continuous movement of water on, above, and below the surface of the Earth is known as the water cycle.
Key Stages of the Water Cycle:
- Evaporation:
- Water from oceans, rivers, and lakes heats up due to the Sun's energy and transforms into water vapor, rising into the atmosphere.
- Condensation:
- As the water vapor rises, it cools and condenses to form clouds. This process is crucial for the formation of precipitation.
- Precipitation:
- When the clouds become heavy with water droplets, they release this water back to the Earth in the form of rain, snow, sleet, or hail.
- Collection:
- The precipitation collects in bodies of water like rivers, lakes, and oceans, where the cycle begins anew. Some water also seeps into the ground, replenishing groundwater supplies.
Importance of the Water Cycle:
- Supports Life:
- The water cycle is essential for all living organisms. It provides fresh water for drinking, agriculture, and sanitation.
- Climate Regulation:
- It plays a crucial role in regulating the Earth's climate by distributing heat and moisture around the planet.
- Ecosystem Balance:
- The cycle maintains the balance of ecosystems by ensuring that plants and animals have access to water.
In summary, the water cycle is a vital system driven by solar energy, ensuring the continuous movement and recycling of water, supporting life, and regulating climate.
What does the secondary sector include?- a)Teaching students
- b)Harvesting crops
- c)Processing raw materials into products
- d)Repairing vehicles
Correct answer is option 'C'. Can you explain this answer?
a)
Teaching students
b)
Harvesting crops
c)
Processing raw materials into products
d)
Repairing vehicles
|
|
Dr Manju Sen answered |
The secondary sector includes processing raw materials into products. This involves taking materials from the primary sector, such as raw minerals or agricultural products, and manufacturing them into finished goods.
Addition of one negative and one positive integer is- a)always positive
- b)always negative
- c)same as the sign of larger number
- d)same as the sign of smaller number
Correct answer is option 'C'. Can you explain this answer?
Addition of one negative and one positive integer is
a)
always positive
b)
always negative
c)
same as the sign of larger number
d)
same as the sign of smaller number
|
Vp Classes answered |
If the magnitude of positive number is greater than the negative number then there will be some positive remainder after adding the negative number.Hence,it will be the sign of a large number.
When can Venus be observed for most of the year?- a)At midnight
- b)At noon
- c)At dawn or dusk
- d)Throughout the day
Correct answer is option 'C'. Can you explain this answer?
When can Venus be observed for most of the year?
a)
At midnight
b)
At noon
c)
At dawn or dusk
d)
Throughout the day
|
Tanishq Khanna answered |
Understanding Venus' Visibility
Venus, often referred to as the "Evening Star" or "Morning Star," is one of the brightest objects in the night sky. Its visibility throughout the year can be attributed to its position relative to the Earth and the Sun.
Why Venus is Visible at Dawn or Dusk
- Orbit and Position: Venus orbits the Sun at a distance closer than Earth. This means that it is often situated between the Earth and the Sun, making it visible during certain times of the day.
- Phases of Venus: Similar to the Moon, Venus goes through phases. During its cycle, it can be seen just before sunrise (dawn) or just after sunset (dusk), depending on its position in its orbit.
- Brightness: Venus reflects sunlight effectively, making it exceptionally bright, which contributes to its visibility at these times.
Comparison with Other Times
- Midnight: At midnight, Venus is usually on the opposite side of the Sun, making it difficult to observe.
- Noon: During midday, the Sun's brightness overshadows Venus, rendering it invisible to the naked eye.
- Throughout the Day: Although Venus can occasionally be seen during the day, it is not consistently visible due to the Sun's glare.
Conclusion
In summary, Venus can be observed most of the year primarily at dawn or dusk, making option 'C' the correct choice. Its unique position in the solar system allows it to shine brightly during these times, captivating skywatchers around the globe.
Venus, often referred to as the "Evening Star" or "Morning Star," is one of the brightest objects in the night sky. Its visibility throughout the year can be attributed to its position relative to the Earth and the Sun.
Why Venus is Visible at Dawn or Dusk
- Orbit and Position: Venus orbits the Sun at a distance closer than Earth. This means that it is often situated between the Earth and the Sun, making it visible during certain times of the day.
- Phases of Venus: Similar to the Moon, Venus goes through phases. During its cycle, it can be seen just before sunrise (dawn) or just after sunset (dusk), depending on its position in its orbit.
- Brightness: Venus reflects sunlight effectively, making it exceptionally bright, which contributes to its visibility at these times.
Comparison with Other Times
- Midnight: At midnight, Venus is usually on the opposite side of the Sun, making it difficult to observe.
- Noon: During midday, the Sun's brightness overshadows Venus, rendering it invisible to the naked eye.
- Throughout the Day: Although Venus can occasionally be seen during the day, it is not consistently visible due to the Sun's glare.
Conclusion
In summary, Venus can be observed most of the year primarily at dawn or dusk, making option 'C' the correct choice. Its unique position in the solar system allows it to shine brightly during these times, captivating skywatchers around the globe.
Which of the following option is not true with respect to given number line?
- a)B is greater than −10
- b)A is greater than 0
- c)A is greater than B
- d)B is greater than 0
Correct answer is option 'D'. Can you explain this answer?
Which of the following option is not true with respect to given number line?
a)
B is greater than −10
b)
A is greater than 0
c)
A is greater than B
d)
B is greater than 0
|
|
Shiksha Academy answered |
We have,
A = 8 and B = −4
The numbers on the number line increase on moving from left to right on the number line. The point B is left to the number 0, so B is less than 0.
A. − 4 > −10 ⇒ B > −10 True
B is right to −10. So, B is greater.
B. 8 > 0 ⇒ A > 0 True
A is right to 0. So, A is greater.
C. A > −4 ⇒ A > B True
A is right to B. So, A is greater.
D. As − 4 < 0 ⇒ B < 0. So, B > 0 is false.
0 is right to B. So, 0 is greater.
The numbers on the left of 0 are ______ numbers, and the numbers on the right of 0 are ________ numbers.- a)negative, positive
- b)positive, negative
- c)positive, positive
- d)negative, negative
Correct answer is option 'A'. Can you explain this answer?
The numbers on the left of 0 are ______ numbers, and the numbers on the right of 0 are ________ numbers.
a)
negative, positive
b)
positive, negative
c)
positive, positive
d)
negative, negative
|
Coachify answered |
This is a sample number line.
We can observe that: The numbers on the left of 0 are negative numbers and the numbers on the right of 0 are positive numbers.
Evaluate:(+5) + (−6) = ?- a)−1
- b)1
- c)2
- d)−2
Correct answer is option 'A'. Can you explain this answer?
Evaluate:
(+5) + (−6) = ?
a)
−1
b)
1
c)
2
d)
−2
|
|
Shiksha Academy answered |
Write given integers in addition expression and we get:
(+5) + (−6)
Subtract smaller integer 5 from bigger integer 6 as follows:
6 − 5 = 1
Since, the bigger integer −6 is a negative integer, so the result should also be negative that is −1
Hence, +5 − 6 = −1
In which galaxy is our Solar System located?- a)Andromeda Galaxy
- b)Milky Way Galaxy
- c)Triangulum Galaxy
- d)Sombrero Galaxy
Correct answer is option 'B'. Can you explain this answer?
a)
Andromeda Galaxy
b)
Milky Way Galaxy
c)
Triangulum Galaxy
d)
Sombrero Galaxy
|
|
Torcia Education answered |
Our Solar System is located in the Milky Way Galaxy.
The coordinate of 3rd alphabet on left of C is
- a)−3
- b)3
- c)0
- d)1
Correct answer is option 'C'. Can you explain this answer?
The coordinate of 3rd alphabet on left of C is
a)
−3
b)
3
c)
0
d)
1
|
Gunjan Lakhani answered |
3rd alphabet to the left of C is O.
O lies on 0 on number line. Hence, its coordinate is 0.
On the number line, the integer 5 is located _______.- a)to the left of 0
- b)to the right of 0
- c)to the left of 1
- d)to the left of −2
Correct answer is option 'B'. Can you explain this answer?
On the number line, the integer 5 is located _______.
a)
to the left of 0
b)
to the right of 0
c)
to the left of 1
d)
to the left of −2
|
|
Coachify answered |
The number line represents all the real numbers. The positive numbers are on the right of 0 and the negative numbers are on the left of 0, as shown in the above figure.
Since 5 is a positive number, it lies to the right of 0.
Hence, on the number line, the integer 5 is located to the right of 0.
Compare: 1,00,002 ___ 10,00,002- a)>
- b)<
- c)=
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Compare: 1,00,002 ___ 10,00,002
a)
>
b)
<
c)
=
d)
None of these
|
|
Vp Classes answered |
If we write the given numbers in words well be easily able to solve this.
One lakh two and the second number is ten lakh two.
Obviously the second number is greater then the first.
So option B is the correct answer.
By observing the above number line, state which of the following statements is true.
- a)B is 2
- b)A is 4
- c)B is –13
- d)B is −4
Correct answer is option 'D'. Can you explain this answer?
By observing the above number line, state which of the following statements is true.
a)
B is 2
b)
A is 4
c)
B is –13
d)
B is −4
|
Praveen Kumar answered |
From above number line we cans see that A is 7 marks right of 0 and B is 4 marks to the left of 0
So, A = 7 and B = −4
Hence, Option (D) is correct
On the following number line value ‘zero’ is shown by the point
- a)X
- b)Y
- c)Z
- d)W
Correct answer is option 'C'. Can you explain this answer?
On the following number line value ‘zero’ is shown by the point
a)
X
b)
Y
c)
Z
d)
W
|
|
Praveen Kumar answered |
Option (c) is correct; in the figure given below, each unit has a value of 5.
Answer the following using number line.The integer which is 7 more than −4 is - a)−7
- b)−3
- c)3
- d)7
Correct answer is option 'C'. Can you explain this answer?
Answer the following using number line.
The integer which is 7 more than −4 is
a)
−7
b)
−3
c)
3
d)
7
|
|
Coachify answered |
Starting from −4, move 7 unit right. So, from the above figure, we can conclude that integer 3 is 7 more than −4.
What should be added to 18 to get −34?- a)52
- b)−52
- c)−16
- d)16
Correct answer is option 'B'. Can you explain this answer?
What should be added to 18 to get −34?
a)
52
b)
−52
c)
−16
d)
16
|
|
Coachify answered |
Let the number be x.
Then according to the problem we get,
x + 18 = −34
or x = −34 − 18
or x = −52.
What is the main source of light and heat for Earth?- a)The Moon
- b)The Sun
- c)A star
- d)A comet
Correct answer is option 'B'. Can you explain this answer?
What is the main source of light and heat for Earth?
a)
The Moon
b)
The Sun
c)
A star
d)
A comet
|
Coders Trust answered |
The Sun is the main source of light and heat for Earth. It helps keep the planet warm and is crucial for life, providing energy for plants and regulating the Earth's climate.
Which integer is the additive inverse of itself?- a)−1
- b)1
- c)0
- d)2
Correct answer is option 'C'. Can you explain this answer?
Which integer is the additive inverse of itself?
a)
−1
b)
1
c)
0
d)
2
|
|
Coachify answered |
Additive inverse of number is that when added to a number it results in 0
Additive inverse of itself = a + 0 = 0
Therefore a = 0
Hence the correct answer is option C.
The integer 5 units to the right of 0 on the number line is:- a)+5
- b)−5
- c)+4
- d)−4
Correct answer is option 'A'. Can you explain this answer?
The integer 5 units to the right of 0 on the number line is:
a)
+5
b)
−5
c)
+4
d)
−4
|
|
Shiksha Academy answered |
Option A is right.
The integer 5 units to the right of 0 on the number line' is 0 + 5 = +5.
The integer 5 units to the right of 0 on the number line' is 0 + 5 = +5.
The smallest positive integer is- a)0
- b)10
- c)1
- d)9
Correct answer is option 'C'. Can you explain this answer?
The smallest positive integer is
a)
0
b)
10
c)
1
d)
9
|
|
Dr Manju Sen answered |
The smallest positive integer is 1. Positive integers are the numbers greater than 0, and the smallest of these is 1.
Thus, the smallest positive integer is 1Thus, the smallest positive integer is 1
When the integers 10, 0, 4, 5, 7 are arranged in descending or ascending order, them find out which of the following integers always remains in the middle of the arrangement.- a)5
- b)7
- c)4
- d)0
Correct answer is option 'A'. Can you explain this answer?
When the integers 10, 0, 4, 5, 7 are arranged in descending or ascending order, them find out which of the following integers always remains in the middle of the arrangement.
a)
5
b)
7
c)
4
d)
0
|
EduRev CAT answered |
We are given the integers 10, 0, 4, 5, 7. We need to arrange them in both ascending order (smallest to largest) and descending order (largest to smallest). Then we must check which integer always comes in the middle.
Step 1: Arrange in ascending order
Ascending means from the smallest to the greatest: 0, 4, 5, 7, 10.
Here, the middle number is the third one (since there are 5 numbers). So, the middle is 5.
Ascending means from the smallest to the greatest: 0, 4, 5, 7, 10.
Here, the middle number is the third one (since there are 5 numbers). So, the middle is 5.
Step 2: Arrange in descending order
Descending means from the greatest to the smallest: 10, 7, 5, 4, 0.
Here again, the middle number is the third one. So, the middle is still 5.
Descending means from the greatest to the smallest: 10, 7, 5, 4, 0.
Here again, the middle number is the third one. So, the middle is still 5.
Step 3: Compare both
Middle in ascending order = 5.
Middle in descending order = 5.
So, 5 always remains in the middle, no matter how we arrange.
Middle in ascending order = 5.
Middle in descending order = 5.
So, 5 always remains in the middle, no matter how we arrange.
Final Answer: The integer that always stays in the middle is a) 5
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