EXERCISES (ENERGY)

1. What do living things need to carry out their life processes and daily activities?
A. Food     B. Water     C. Energy     D. Machines

2. Diagram 1 shows four types of activities.

P

Q

                                                                   

R

S

 Diagram1

Which activities require energy to carry out?
A. P and Q only     B. R and S only     C. P, Q and S only   D. P, Q, R, S






3. Diagram 2 shows two objects.

food

battery

                                                                            Diagram 2

What can we get from the objects in the diagram?
A. Light     B. Heat     C. Energy     D. Electricity

4. What form of energy is stored in firewood and coal?
A. Chemical energy     B. Potential energy     C. Light energy     D. Heat energy

5. Diagram 3 shows a ball at the top of an inclined plane.

                                                                        Diagram3
What form of energy does the ball have?
A. Potential energy     B. Chemical energy     C. Kinetic energy     D. Heat energy

6. Diagram 4 shows an electric circuit.

What energy transformation takes place when the switch in the circuit is closed?
A. Potential energy---heat energy---light energy
B. Potential energy---electrical energy---light energy
C. Chemical energy---electrical energy---heat energy---light energy
D. Chemical energy---heat energy---electrical energy---light energy

7. Which of the following shows the use of non-renewable energy?
A. Solar energy is used to heat water in homes.
B. Windmills are used to generate electricity.
C. Biomass fuels are burned to release heat.
D. Petroleum is burnt to move vehicles.

8. Diagram 5 shows a hydroelectric power station.

which statements about the energy source are correct?
I     It will not be depleted.
II   It does not produce greenhouse gasses.
III The kinetic energy of water is transformed into electrical energy.
IV Building the dam will flood a large area, causing habitat destruction.

A. I and III only     B. II and III only     C. I. III and IV only     D. I, II, III and IV only



ANSWER:
1. C    2. D    3. C    4. C    5. A    6. A    7. D    8. D