24 7th Comprehensive Science 2nd Nine Weeks Review

Front

What is energy transformation?

Back

Energy transformation is the process of changing energy from one form to another, such as chemical energy in a battery being converted to electrical energy.

Front

What is the correct order of energy transformation for a battery powered flashlight?

Back

Chemical energy --> Electrical energy --> Light energy.

Front

How does energy from the Sun travel to Earth?

Back

Energy from the Sun travels to Earth as radiation.

Front

What happens to sound in a vacuum?

Back

Sound cannot travel in a vacuum because there are no particles to transmit the sound waves.

Front

What is heat?

Back

Heat is the energy that is transferred from one body to another due to a difference in temperature.

Front

Why does a hot potato cool down over time?

Back

The heat from the potato is transferred to the surrounding air, causing the potato to lose heat and cool down.

Front

What is conduction?

Back

Conduction is the transfer of heat through direct contact between materials.

Front

What is convection?

Back

Convection is the transfer of heat through the movement of fluids (liquids or gases) caused by differences in temperature.

Front

What is radiation?

Back

Radiation is the transfer of energy through electromagnetic waves, such as sunlight reaching Earth.

Front

What is the relationship between temperature and heat flow?

Back

Heat flows from an object with a higher temperature to an object with a lower temperature.