Class 5 Exam > Class 5 Notes > Our Wondrous World Class 5 - New NCERT > Unit Test: Energy — How Things Work
Unit Test: Energy — How Things Work | Our Wondrous World Class 5 - New NCERT PDF Download
Time: 45 Minutes
M.M.: 20
Attempt all questions.
Question numbers 1 to 6 carry 1 mark each.
Question numbers 7 to 9 carry 3 marks each.
Question number 10 carries 5 marks.
Q1. Which is a clean source of energy?
(a) Coal
(b) Diesel
(c) Solar energy
(d) Kerosene
Q2. Fill in the blanks:
Energy makes things ______, produce ______, give ______, and change temperature.
Q3. True or False:
Wind can make a pinwheel rotate, and water can turn a water wheel.
Q4. Which fuel commonly used at home for cooking is cleaner than coal or wood?
Q5. Match the following:
Q6. Which airport is known for being entirely powered by solar energy?
(a) Mumbai
(b) Delhi
(c) Cochin
(d) Chennai
Q7. Give three examples from daily life where electricity is used for different purposes.
Q8. Why is energy efficiency important? List three actions to save energy at home/school.
Q9. Give three reasons why wind, solar, and water are called clean sources of energy.
Q10. Draw a simple “Energy Flow” for any one device and explain:
(a) Source of energy,
(b) Type of energy used/converted,
(c) Useful output.
Find Solutions for the Unit Test - Here
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FAQs on Unit Test: Energy — How Things Work - Our Wondrous World Class 5 - New NCERT
| 1. What is energy, and why is it important in our daily lives? |  |
Ans.Energy is the ability to do work or cause change. It plays a crucial role in our daily lives as it powers our homes, vehicles, and electronic devices. Without energy, we wouldn't have light, heat, or the ability to perform tasks efficiently.
| 2. What are the different forms of energy? | |
Ans.Energy exists in several forms, including kinetic energy (the energy of motion), potential energy (stored energy based on position), thermal energy (heat), chemical energy (stored in bonds of molecules), electrical energy (flow of electric charge), and nuclear energy (stored in atomic nuclei). Each form can be converted into others.
| 3. How do we obtain energy for our everyday needs? | |
Ans.We obtain energy from various sources, including fossil fuels (like coal, oil, and natural gas), renewable resources (such as solar, wind, and hydroelectric power), and nuclear power. These sources are harnessed through different technologies to generate electricity and provide fuel for transportation and heating.
| 4. What is the law of conservation of energy? | |
Ans.The law of conservation of energy states that energy cannot be created or destroyed; it can only be transformed from one form to another. This means that the total energy in a closed system remains constant, even though it may change forms, such as from potential energy to kinetic energy during a fall.
| 5. How does energy impact the environment? | |
Ans.Energy production and consumption significantly impact the environment. Fossil fuel usage contributes to air pollution and greenhouse gas emissions, leading to climate change. In contrast, renewable energy sources like solar and wind produce little to no emissions, making them more environmentally friendly options.
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Sep 06, 2025
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