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All questions of Energy for Year 4 Exam
What is the energy transfer sequence when a boy eats a hen that has eaten corn?- a)Hen → Boy → Corn
- b)Boy → Corn → Hen
- c)Corn → Boy → Hen
- d)Corn → Hen → Boy
Correct answer is option 'D'. Can you explain this answer?
What is the energy transfer sequence when a boy eats a hen that has eaten corn?
a)
Hen → Boy → Corn
b)
Boy → Corn → Hen
c)
Corn → Boy → Hen
d)
Corn → Hen → Boy
 | Yashina Kapoor answered |
The energy transfer sequence is corn → hen → boy. This illustrates how energy flows through the food chain, with energy originating from producers and moving up to consumers. Understanding these sequences is important for studying ecosystems and food webs.
What type of energy is associated with moving air?- a)Kinetic energy
- b)Nuclear energy
- c)Chemical energy
- d)Thermal energy
Correct answer is option 'A'. Can you explain this answer?
What type of energy is associated with moving air?
a)
Kinetic energy
b)
Nuclear energy
c)
Chemical energy
d)
Thermal energy
 | Freak Artworks answered |
Kinetic energy is associated with moving air, such as wind. This energy can be harnessed to perform work, such as driving wind turbines to generate electricity.
What do we call organisms that produce their own food?- a)Decomposers
- b)Predators
- c)Producers
- d)Consumers
Correct answer is option 'C'. Can you explain this answer?
What do we call organisms that produce their own food?
a)
Decomposers
b)
Predators
c)
Producers
d)
Consumers
 | Torcia Education answered |
Organisms that produce their own food, such as plants, are called producers. They utilize sunlight to create energy-rich compounds through photosynthesis, forming the foundation of food webs.
Why are animals referred to as consumers?- a)They decompose organic matter
- b)They rely on eating other organisms for energy
- c)They are the primary source of energy
- d)They produce their own food
Correct answer is option 'B'. Can you explain this answer?
Why are animals referred to as consumers?
a)
They decompose organic matter
b)
They rely on eating other organisms for energy
c)
They are the primary source of energy
d)
They produce their own food
| | Torcia Education answered |
Animals are referred to as consumers because they rely on eating other organisms—plants or animals—to obtain the energy necessary for survival. This role is crucial in maintaining the balance of ecosystems.
Which of the following best describes the conservation of energy?- a)Energy can only be transferred or transformed
- b)Energy can be created from nothing
- c)Energy can be lost in every process
- d)Energy is always visible
Correct answer is option 'A'. Can you explain this answer?
Which of the following best describes the conservation of energy?
a)
Energy can only be transferred or transformed
b)
Energy can be created from nothing
c)
Energy can be lost in every process
d)
Energy is always visible
 | Edgy Education answered |
The conservation of energy states that energy cannot be created or destroyed; it can only be transferred or transformed from one form to another. This principle is crucial in physics and helps explain many natural phenomena.
What term describes animals that only eat plants?- a)Decomposers
- b)Carnivores
- c)Herbivores
- d)Omnivores
Correct answer is option 'C'. Can you explain this answer?
What term describes animals that only eat plants?
a)
Decomposers
b)
Carnivores
c)
Herbivores
d)
Omnivores
 | Rahul Kumar answered |
Herbivores are animals that exclusively consume plants. Examples include zebras and snails. Understanding the dietary categorization of animals helps in studying food webs and ecological interactions.
What is the role of consumers in an ecosystem?- a)To decompose organic matter
- b)To obtain energy by consuming other organisms
- c)To provide shelter
- d)To produce food
Correct answer is option 'B'. Can you explain this answer?
What is the role of consumers in an ecosystem?
a)
To decompose organic matter
b)
To obtain energy by consuming other organisms
c)
To provide shelter
d)
To produce food
| | Yashina Kapoor answered |
Consumers obtain energy by consuming plants or other animals. This creates a dynamic food web where energy flows from producers to consumers, maintaining the balance in ecosystems.
Which of the following is a form of energy?- a)Size
- b)Light
- c)Color
- d)Shape
Correct answer is option 'B'. Can you explain this answer?
Which of the following is a form of energy?
a)
Size
b)
Light
c)
Color
d)
Shape
| | Freak Artworks answered |
Light is a distinct form of energy that is visible and can be harnessed for various uses, such as solar power. Unlike color, shape, or size, light can do work, such as powering solar panels.
What is an example of energy manifested as sound?- a)A glowing light bulb
- b)A ringing bell
- c)A flowing river
- d)A moving car
Correct answer is option 'B'. Can you explain this answer?
What is an example of energy manifested as sound?
a)
A glowing light bulb
b)
A ringing bell
c)
A flowing river
d)
A moving car
| | Rahul Kumar answered |
A ringing bell is an example of energy manifested as sound. Sound energy is produced by vibrating objects, and it travels through air (or other media) to reach our ears.
What is the primary function of energy in living organisms?- a)To create sound
- b)To change shape
- c)To produce light
- d)To facilitate movement and vital processes
Correct answer is option 'D'. Can you explain this answer?
What is the primary function of energy in living organisms?
a)
To create sound
b)
To change shape
c)
To produce light
d)
To facilitate movement and vital processes
 | Indu Gupta answered |
The primary function of energy in living organisms is to facilitate movement and essential life processes, such as growth, reproduction, and maintaining homeostasis. Energy is vital for all biological functions.
What happens to energy when a cup of tea cools down?- a)It is destroyed
- b)It increases in temperature
- c)It is transferred to the environment
- d)It turns into light
Correct answer is option 'C'. Can you explain this answer?
What happens to energy when a cup of tea cools down?
a)
It is destroyed
b)
It increases in temperature
c)
It is transferred to the environment
d)
It turns into light
 | Vp Classes answered |
When a cup of tea cools down, the heat energy is transferred to the surrounding environment. This process illustrates energy conservation, where the energy is not lost but rather distributed into the surroundings.
What type of energy transformation occurs when a drum is struck?- a)Electrical energy to chemical energy
- b)Thermal energy to mechanical energy
- c)Movement energy to sound energy
- d)Sound energy to light energy
Correct answer is option 'C'. Can you explain this answer?
What type of energy transformation occurs when a drum is struck?
a)
Electrical energy to chemical energy
b)
Thermal energy to mechanical energy
c)
Movement energy to sound energy
d)
Sound energy to light energy
| | Edgy Education answered |
When a drum is struck, the movement energy from the hand is transferred to the drum, which then produces sound energy. This demonstrates how energy can change forms while still being conserved.
Which of the following statements about energy is true?- a)Energy is not essential for life
- b)Energy is always visible
- c)Energy can change forms
- d)Energy can be created
Correct answer is option 'C'. Can you explain this answer?
Which of the following statements about energy is true?
a)
Energy is not essential for life
b)
Energy is always visible
c)
Energy can change forms
d)
Energy can be created
| | Indu Gupta answered |
Energy can change forms, such as from kinetic to potential energy or from electrical to mechanical energy. This versatility is fundamental in various physical processes and technological applications.
What is the energy transformation when a fan operates?- a)Chemical energy to electrical energy
- b)Electrical energy to movement energy
- c)Light energy to movement energy
- d)Sound energy to thermal energy
Correct answer is option 'B'. Can you explain this answer?
What is the energy transformation when a fan operates?
a)
Chemical energy to electrical energy
b)
Electrical energy to movement energy
c)
Light energy to movement energy
d)
Sound energy to thermal energy
| | Edgy Education answered |
A fan transforms electrical energy into movement energy to rotate its blades. This process demonstrates how electrical appliances convert one form of energy into another to perform work.
What happens to energy during a transfer?- a)It is conserved
- b)It is created
- c)It is lost completely
- d)It is destroyed
Correct answer is option 'A'. Can you explain this answer?
What happens to energy during a transfer?
a)
It is conserved
b)
It is created
c)
It is lost completely
d)
It is destroyed
| | Indu Gupta answered |
Energy is conserved during transfers; it cannot be created or destroyed. This principle underlies many physical processes and is a cornerstone of the law of conservation of energy in physics.
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