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Test: Air, Water And Weather - 1 - Class 5 MCQ


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25 Questions MCQ Test Science Class 5 - Test: Air, Water And Weather - 1

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Test: Air, Water And Weather - 1 - Question 1

The process which allows insoluble particle to settle down in a solution is called

Detailed Solution for Test: Air, Water And Weather - 1 - Question 1

The process which allows insoluble particles to settle down in a solution is called sedimentation.
Sedimentation is a physical process in which particles suspended in a liquid settle down at the bottom of the container due to gravity. Here is a detailed explanation of sedimentation:
Process:
- When a suspension is left undisturbed, the force of gravity causes the solid particles to settle down at the bottom of the container.
- The settling process is influenced by the size, shape, and density of the particles, as well as the viscosity of the liquid.
- The larger and denser particles settle faster, while smaller and lighter particles take longer to settle.

Test: Air, Water And Weather - 1 - Question 2

You have been given a mixture of iron fillings, sand and sugar. You have to separate them by

(i) use of magnet   
(ii) making solution with water
(iii) evaporation                                  
(iv) filtration

Q. What will be correct sequence

Detailed Solution for Test: Air, Water And Weather - 1 - Question 2

The correct sequence to separate the mixture of iron fillings, sand, and sugar is:
(i) Use of magnet
The iron fillings can be separated from the mixture by using a magnet. As iron is magnetic, the magnet will attract the iron fillings, allowing them to be separated easily.
(ii) Making solution with water
By making a solution with water, we can dissolve the sugar in it. Both sand and iron fillings are insoluble in water, so they will not dissolve. This step helps in separating the sugar from the mixture.
(iv) Filtration
After making a solution with water, we can use filtration to separate the sand from the mixture. The sand particles are larger and will be retained by the filter paper, while the sugar solution will pass through.
(iii) Evaporation
The final step is to evaporate the water from the sugar solution obtained in the previous step. By heating the solution, the water will evaporate, leaving behind the sugar crystals.
Therefore, the correct sequence to separate the mixture is (i) Use of magnet, (ii) Making solution with water, (iv) Filtration, (iii) Evaporation.

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Test: Air, Water And Weather - 1 - Question 3

A cold drink bottle mouth was capped with a balloon. Which action can lead to increase in the size of balloon?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 3

To increase the size of the balloon, the cold drink bottle mouth is capped with a balloon.
Putting in hot water:
- Hot water will heat up the air inside the bottle, causing it to expand.
- As the air expands, the size of the balloon will increase.
Therefore, putting in hot water is the action that can lead to an increase in the size of the balloon.

Test: Air, Water And Weather - 1 - Question 4

Which of the following statements is true?

(i) Chlorination makes the water safe for drinking
(ii) Chlorinated water is made by distillation
(iii) Water must be boiled for at least 10 minutes to make it fit for drinking
(iv) Potassium paramagnet is also used to kill germs in water

Detailed Solution for Test: Air, Water And Weather - 1 - Question 4

Statement Analysis:

(i) Chlorination makes the water safe for drinking:

  • Chlorination is a commonly used method to disinfect water.
  • Chlorine kills harmful bacteria, viruses, and other microorganisms present in the water.
  • Thus, chlorination does make the water safe for drinking.

 

(ii) Chlorinated water is made by distillation:

  • Chlorinated water is not made by distillation.
  • Distillation is a process of separating different components of a liquid mixture based on their boiling points.
  • Chlorination, on the other hand, is a process of adding chlorine to water to kill germs.
  • Therefore, statement (ii) is false.

(iii) Water must be boiled for at least 10 minutes to make it fit for drinking:

  • Boiling water is an effective method to kill most types of pathogens present in it.
  • It is generally recommended to boil water for at least 1 minute to make it safe for drinking.
  • However, boiling water for 10 minutes would certainly ensure the elimination of any harmful microorganisms.
  • Therefore, statement (iii) is true.

 

 

(iv) Potassium permanganate is also used to kill germs in water:

  • Potassium permanganate is a strong oxidizing agent and can be used to treat water.
  • It can effectively kill certain types of bacteria, viruses, and parasites.
  • However, it is not as commonly used as chlorine for water disinfection.
  • Therefore, statement (iv) is true.

 

After analyzing each statement, we can conclude that the correct answer is (A) (i), (iii), and (iv).

 

Test: Air, Water And Weather - 1 - Question 5

Which of the following protect us from harmful rays of sun?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 5

Answer:
The correct option that protects us from harmful rays of the sun is the Ozonosphere. Here is a detailed explanation:
Ozonosphere:
- The ozonosphere, also known as the ozone layer, is a protective layer in the Earth's atmosphere.
- It is located in the stratosphere, approximately 10 to 50 kilometers above the Earth's surface.
- The ozonosphere contains a high concentration of ozone (O3) molecules.
- Ozone molecules in the ozonosphere absorb and filter out the majority of the Sun's ultraviolet (UV) radiation.
- UV radiation can be harmful to living organisms, causing skin cancer, cataracts, and other health issues.

Test: Air, Water And Weather - 1 - Question 6

Oxygen is needed in which process?

(i) Respiration
(ii) Burning   
(iii) Photosynthesis

Detailed Solution for Test: Air, Water And Weather - 1 - Question 6

- Oxygen is required in both respiration and burning processes.
- In respiration, oxygen is used by living organisms to break down glucose and produce energy.
- In burning, oxygen reacts with a fuel to release heat and light.
- Photosynthesis, on the other hand, is a process where plants use carbon dioxide, water, and sunlight to produce glucose and oxygen.
- Therefore, the correct answer is C: (i), and (ii).Answer:

Test: Air, Water And Weather - 1 - Question 7

Air pressure is measured with an instrument, called

Detailed Solution for Test: Air, Water And Weather - 1 - Question 7

The instrument used to measure air pressure is called a barometer.
A barometer is a scientific instrument that is used to measure atmospheric pressure. It consists of a long glass tube filled with mercury or a liquid called a manometer. The barometer works on the principle of balancing the weight of the mercury or liquid with the atmospheric pressure. When the air pressure is high, the mercury or liquid in the tube rises, and when the air pressure is low, it falls.

 

 

Test: Air, Water And Weather - 1 - Question 8

Which of the following changes can be possible by heating?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 8

Ice changes to liquid water: This change occurs when ice is heated. When the temperature of ice increases above its melting point (0 degrees Celsius or 32 degrees Fahrenheit), it changes from a solid state to a liquid state, forming liquid water. Heating ice causes it to melt and become liquid water.

Test: Air, Water And Weather - 1 - Question 9

Which of the following is not used for making drinking water?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 9

Sublimation:
- Sublimation is the process of converting a solid directly into a gas without going through the liquid phase.
- While sublimation can be used for purifying some substances, it is not commonly used for making drinking water.
- Sublimation is not efficient in removing dissolved impurities and contaminants from water.

Test: Air, Water And Weather - 1 - Question 10

Ozone layer protects us from

Detailed Solution for Test: Air, Water And Weather - 1 - Question 10

The correct answer is C.

  • The ozone layer protects us from UV rays, including UVA, UVB, and UVC, as well as provides some protection against cosmic rays. However, it does not offer any protection against lasers.
  • In conclusion, the ozone layer plays a crucial role in protecting us from harmful UV rays and partially shields us from cosmic rays. It is important to take precautions such as wearing sunscreen, protective clothing, and sunglasses to further minimize exposure to UV radiation.
Test: Air, Water And Weather - 1 - Question 11

Which layer of the atmosphere is the lowermost and where all weather changes take place?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 11
  • The layer of the atmosphere where all weather changes take place is called the troposphere. This layer is the closest to the Earth's surface and extends up to about 15 kilometers above us.
  • It contains the right amount of air for us to breathe and helps in creating different weather patterns like rain, wind, and clouds.
  • So, the correct answer is the troposphere.
Test: Air, Water And Weather - 1 - Question 12

The layer of the atmosphere where all weather changes take place is the _______.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 12

The layer of the atmosphere where all weather changes take place is called the troposphere. It's where we find the air we need to breathe and where most of the Earth's weather occurs.

Test: Air, Water And Weather - 1 - Question 13

State whether the following statement is True or False:

All living things need air and water to survive. It is possible to live for some days without food and water, but we cannot stay alive for even a few minutes without air.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 13
  • This statement is True. Air is very important for all living things to survive. While we can go without food and water for some time, we cannot live without air even for a few minutes. Air contains oxygen, which is necessary for us to breathe and stay alive.
  • Did you know? The atmosphere around the Earth is like a big blanket that helps protect us and provides us with the air we need to breathe.
Test: Air, Water And Weather - 1 - Question 14

What is the role of the stratosphere in the atmosphere?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 14
  • The stratosphere in the atmosphere helps by absorbing harmful ultraviolet rays from the sun. This absorption is important because it prevents these rays from reaching us on the Earth's surface, which could otherwise harm living things. So, the stratosphere acts like a shield, protecting us from these dangerous rays.
Test: Air, Water And Weather - 1 - Question 15

The layer of the atmosphere directly above the mesosphere is the ____.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 15

The layer of the atmosphere directly above the mesosphere is called the thermosphere. It is where space shuttles revolve and the temperature can increase significantly with altitude. Remember, it's the layer right above the cold mesosphere!

Test: Air, Water And Weather - 1 - Question 16

State whether the following statement is True or False:

The stratosphere is the coldest layer of the atmosphere.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 16
  • The statement is False.
  • In the atmosphere, the coldest layer is the mesosphere, not the stratosphere. The mesosphere is located just above the stratosphere and has temperatures that can drop as low as -120°C.
  • Interesting Fact: Did you know that the mesosphere is the layer where meteors burn up when entering Earth's atmosphere? This layer helps protect us from space debris!
Test: Air, Water And Weather - 1 - Question 17

What happens when you press the cardboard covering a glass full of water and then turn it upside down?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 17
  • When you press the cardboard covering the water-filled glass and turn it upside down, the water stays in the glass. This is because the air below the cardboard pushes upwards with a force stronger than the weight of the water. So, the cardboard stays in place, and the water does not spill out.
Test: Air, Water And Weather - 1 - Question 18

Air has weight but we do not notice the weight of air. This shows that _____.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 18

Air has weight even though we cannot feel it. When we inflate something with air, it becomes heavier. This tells us that air has weight. So, the correct answer is air.

Test: Air, Water And Weather - 1 - Question 19

State whether the following statement is True or False:

Air has weight but we do not notice the weight of air.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 19
  • In the activity where we inflated one football bladder and compared its weight to a deflated one, we saw that the inflated bladder weighed more. This shows that air has weight even though we cannot see it. So, the statement "Air has weight but we do not notice the weight of air" is True.
Test: Air, Water And Weather - 1 - Question 20

What helps us to hear our friend's voice and music?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 20

We can hear our friend's voice and music because air carries sound vibrations. It acts like a messenger, bringing the sound to our ears. So, when your friend speaks or you listen to music, remember it's the air that helps you hear those sounds around you.

Test: Air, Water And Weather - 1 - Question 21

Air exerts pressure in _____ directions.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 21

Air pushes on things in all directions. It can push things down, up, and from the sides. That's why we feel air pushing on us when it's windy or when we blow up a balloon.

Test: Air, Water And Weather - 1 - Question 22

State whether the following statement is True or False

Air carries sound vibrations. We can listen to music, or hear our friend’s voice because of air, which acts as a medium for sound vibrations.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 22

True! Air helps us hear sounds like music and our friends talking. When someone makes a sound, like playing music or speaking, the sound travels through the air to reach our ears. That's why we can hear them. So, it's correct that air carries sound vibrations!

Test: Air, Water And Weather - 1 - Question 23

What can air pressure help create when set up using a big bottle with a stopper, two tubes, and water?

Detailed Solution for Test: Air, Water And Weather - 1 - Question 23

When we set up a big bottle with a stopper, two tubes, and water, blowing air through one of the tubes can create a fountain. This happens because the air pressure inside the bottle increases, pushing the water to rise through the second tube, resulting in a fountain-like effect.

Test: Air, Water And Weather - 1 - Question 24
Air exerts _____ and pushes things.
Detailed Solution for Test: Air, Water And Weather - 1 - Question 24
Air exerts pressure, which means it pushes on things around it. For example, the wind from a fan is caused by air pressure pushing the air towards you. So, air exerts pressure and pushes things.
Test: Air, Water And Weather - 1 - Question 25

State whether the following statement is True or False:

Air pressure can be used to set up a fountain.

Detailed Solution for Test: Air, Water And Weather - 1 - Question 25

When we blow air through a tube in a bottle, the air pushes the water up and out like a fountain. So, it's true that air pressure can make a fountain!

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