A. Directions: Write TRUE if the statement is correct or FALSE if it is not. Write your answers on
a space provided before each number.
1. Sound is used in communication.
2. Everything that can be heard is a sound.
3. Sound travels at different mediums. It travels faster in liquids than solids in and in
gases.
4. Sound is reflected back as an echo.
5. Microphone is an example of a transducer
B. Identify what is being described in each sentence. Choose the correct answer from the box
below. Write your answers on the space provided before each number.
sound insulators
Microphone
sound
eardrum
Sonar (Sound Navigation and Ranging)
1. It is an echo-sounding device that uses sound propagation
(usually underwater, as in submarine navigation)
2. Materials that absorb most of the energy of sound waves.
3. Is an example of a transducer
4. In each of our ears, we have a very sensitive membrane called
5. It travels at different mediums
C. Write TRUE if the statement is correct or FALSE if it is not. Write your answers on the space
provided before each number.
1. Heat Energy is the result of the movement of tiny particles called atoms,
molecules or ions in solid, in liquid, and in gas.
2. Heat cannot be transformed into mechanical energy.
3. People does not benefit from heat transformation through transportation and
power generation.
4. Steam or heat engines were the first successful engines invented and were the
driving force behind the industrial revolution.
5. Heat is a thermal energy.
6. Steam engines are used to do mechanical jobs in factories.
D. Identify what is being described in each sentence. Choose the correct answer from the box
below. Write your answers on the space provided before each number
Heat
Heat Energy
Geothermal powerplant
Thermal Energy
1. It can be transformed into mechanical energy.
2. It transforms the heat of Earth's molten interior to electrical energy.
3. It is the result of the movement of tiny particles called atoms.
4. It is the sum of the energy from the moving molecules in an object​