Question

Directions: Write TRUE if the statement is correct and write FALSE is the statement is incorrect.


1. Energy is the ability or capacity to do work.

2. Energy comes in different forms and can be transformed from one form to another.

3. Light, sound and heat are all forms of energy. 4. The importance of energy depends on the person using it.

5. Heat energy and light energy are the same.

6. Sun is the source of light and heat.

7. The loudness or intensity of a sound depends on the energy used.

8. Sound waves can be fast or slow.

9. Sound is produced by making heat.

10. We can't see or hold energy but its effect can be seen or felt.

Answer 1

Answer:

1. True
2. True
3. True
4. True
5. False
6. True
7. True
8. True
9. True
10. True

Explanation:

1. Yes, energy is defined as the capacity to do work. For example, a force can be exerted by the object's energy on another object. The other object moves in response to receive energy and does sme work.
2. Yes, energy comes in different forms such as chemical, thermal, heat, light, etc., and can be transformed from one form to another. For example electrical energy converts to thermal and light energy in the light bulb, and chemical energy converts to light energy in the chemical reaction.
3. Yes, light, sound, and heat are all forms of energy. One form of energy can be converted to another form and transferred from one object to the other.
4. Yes, the importance of energy depends on the person using it. Energy can be saved in our daily life by switching off lights, fans, television, and other electrical appliances when they are not in use.
5. No, heat energy and light energy are not the same. However, they both are forms of energy. Heat is a form of kinetic energy and light is a form of electromagnetic energy.
6. Yes, the sun is the source of light and heat. It also gives solar energy. Life on earth is only possible because of the sun as an energy, light and heat source. Otherwise, Earth would freeze.
7. Yes, the loudness and intensity of sound waves depend on the energy. Energy starts waves. Waves of higher amplitude generated due to higher energy. These have higher intensity and hence louder.
8. Yes, sound waves can be fast and slow. It depends on the medium through which waves are passing. These are slowest in gases, faster in liquids, and fastest in solids.
9. Yes, sounds can be produced from the heat and vice-versa. For example, In the tube, heat can increase the temperature which changes air pressure and produces sound waves.
10. Yes, We can't see or hold energy but its effect can be seen or felt. For example, heat energy from the sun can be felt on the skin, and light energy in the light bulb can be seen.

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