Vidaara.orgClass 8 · Mathematics
CodeVID-M8-WS
Sources of Energy — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
25 × 1 = 25 marks
1.
Energy is defined as the ability to do:
- A.Heat
- B.Work
- C.Light
- D.Sound
2.
The energy possessed by a moving object is:
- A.Potential energy
- B.Kinetic energy
- C.Chemical energy
- D.Nuclear energy
3.
Stored energy due to position or condition is:
- A.Kinetic energy
- B.Potential energy
- C.Sound energy
- D.Light energy
4.
In an electric bulb, electrical energy is mainly changed into:
- A.Sound energy
- B.Light energy
- C.Chemical energy
- D.Nuclear energy
5.
The Law of Conservation of Energy states that energy can be:
- A.Created
- B.Destroyed
- C.Only transformed
- D.Multiplied
6.
Which of these is a fossil fuel?
- A.Sunlight
- B.Coal
- C.Wind
- D.Water
7.
Fossil fuels were formed from the remains of ancient:
- A.Rocks
- B.Plants and animals
- C.Metals
- D.Gases only
8.
In a thermal power plant, steam is used to spin a:
- A.Bulb
- B.Turbine
- C.Battery
- D.Magnet only
9.
Fossil fuels are described as ______ because they will eventually run out.
- A.Renewable
- B.Non-renewable
- C.Unlimited
- D.Endless
10.
Hydropower generates electricity using the energy of:
- A.Falling water
- B.Burning coal
- C.Sunlight
- D.Wind only
11.
A source of energy that is naturally replenished and will not run out is called:
- A.Non-renewable
- B.Renewable
- C.Fossil fuel
- D.Limited
12.
Which of these is a renewable source of energy?
- A.Coal
- B.Petroleum
- C.Solar energy
- D.Natural gas
13.
Windmills (wind turbines) generate electricity using the energy of:
- A.Sunlight
- B.Moving air (wind)
- C.Coal
- D.Tides
14.
Heat energy obtained from inside the Earth is called:
- A.Solar energy
- B.Tidal energy
- C.Geothermal energy
- D.Wind energy
15.
A main advantage of renewable sources is that they are:
- A.Limited and polluting
- B.Renewable and clean
- C.Quick to run out
- D.Only found underground
16.
Solar energy comes from the:
- A.Wind
- B.Sun
- C.Sea
- D.Coal
17.
A solar cell (panel) converts sunlight directly into:
- A.Sound
- B.Electricity
- C.Coal
- D.Wind
18.
The mixture of dung and water fed into a biogas plant is called:
- A.Biogas
- B.Slurry
- C.Manure
- D.Petrol
19.
Biogas is mainly made up of the gas:
- A.Oxygen
- B.Methane
- C.Nitrogen
- D.Carbon dioxide only
20.
An advantage of biogas over firewood is that biogas:
- A.Produces a lot of smoke
- B.Burns cleanly without smoke
- C.Cannot be used for cooking
- D.Cuts down trees
21.
Nuclear energy is the energy stored in the ______ of atoms.
- A.Electrons
- B.Nucleus
- C.Surface
- D.Shell
22.
The splitting of a large nucleus into smaller ones is called:
- A.Fusion
- B.Fission
- C.Reflection
- D.Conduction
23.
The reaction that powers the Sun is nuclear:
- A.Fission
- B.Fusion
- C.Reflection
- D.Electrolysis
24.
A serious drawback of nuclear energy is the production of:
- A.Clean water
- B.Radioactive waste
- C.Sunlight
- D.Wind
25.
The growing shortage of energy as fossil fuels are used up is called the:
- A.Water cycle
- B.Energy crisis
- C.Food chain
- D.Carbon cycle
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Work
- (B) Kinetic energy
- (B) Potential energy
- (B) Light energy
- (C) Only transformed
- (B) Coal
- (B) Plants and animals
- (B) Turbine
- (B) Non-renewable
- (A) Falling water
- (B) Renewable
- (C) Solar energy
- (B) Moving air (wind)
- (C) Geothermal energy
- (B) Renewable and clean
- (B) Sun
- (B) Electricity
- (B) Slurry
- (B) Methane
- (B) Burns cleanly without smoke
- (B) Nucleus
- (B) Fission
- (B) Fusion
- (B) Radioactive waste
- (B) Energy crisis
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