YR 4 SCIENCE UNIT 7 - ENERGY

What is the meaning of energy?

• A. The ability to do work

• B. The stored energy an object due to its position

• C. Form of energy that an object has due to its motion.

• D. Energy that stored in the bonds of chemical compounds.

Which of the following are the sources of energy?

• A. Sun, Nuclear and cars

• B. Food, Nuclear and Plastic

• C. Water, wind and biomass

• D. Fossil fuels, clothes and sunlight

Diagram 4 shows a catapult is streched.

What is the energy transformation of the stone after the catapult is released?

• A. Potential energy → Kinetic energy

• B Kinetic energy → Potential energy

• C Chemical energy → Heat energy

• D Heat energy → Chemical energy

What is the energy transformation that happens in this appliance?

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The image shows a method to obtain a type of renewable energy.

What will happen if the usage of this energy is increased?

• A. Fossil fuels will run out.

• B. Increase in the use of windmills.

• C. Decrease in the rate of air pollution.

• D. Increase in the consumption of electrical energy at homes.

Every form of energy below can be transformed from one form to another except

• A Kinetic energy

• B Sound energy

• C Heat energy

• D Magnetic energy

What is the importance of renewable energy sources?

• A. Generate a lot of energy

• B. Reduce air pollution

• C. Increase country income

• D. Save the non-renewable energy sources

Which of the following is true about renewable energy sources?

• A. It includes petroleum, the Sun and natural gas.

• B. It includes coal, biomass and food

• C. It includes wind, water and the Sun

• D. It includes the Sun, food and nuclear materials

Which of these is a non-renewable source of energy?

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What is the reason to save energy at home?

• To use more electricity

• To waste water

• To reduce bills

• To make rooms darker