Question

1 Name the component of sunlight, exposure to which may cause skin cancer.
2. Flowing water possess which type of energy.
3. Name one place in India where wind energy power station is installed.
A. What is a solar panel?
etin
5. What type of energy transformation takes place during winding of spring of a clock?
6. Write two differences between renewable and non-renewable sources of energy.
7. What is the principle of solar cooker? Name two types of solar cooker.
8. Name any two types of harmful nuclear radiations emitted during nuclear fission.
9. What is thermal power plant? Where it is preferably situated?
10. What is the principle of solar cooker? Give two limitations and two advantages of solar cooker.
11 Name the fuel for hydro power plant. Mention two advantages and disadvantages of producing electricity at the
hydro power plant
12 Explain why: a) it is difficult to burn a piece of wood fresh from a tree. b) Pouring dry sand over the fire extinguish
c) It is difficult to use hydrogen as source of energy.
13. What are the different types of energies obtained from sea? Explain.
14. a) What is a principle of Biogas? b) Explain it working in brief. c) Draw a labelled diagram of biogas.​

Answer 1

Answer:

1. UV rays (ultraviolet rays)
2. hydropower energy
3. Kerala.

5.a panel absorbs the sun radiation to generate electricity and heat.

Explanation:

all are very good. questions!

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