Combustion, Heat, and Energy Practice Test

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What type of energy is stored in gasoline?

Back

Chemical energy is the energy stored in the bonds of chemical compounds, like gasoline.

Front

Why do fossil fuels dominate the world's energy use?

Back

Fossil fuels are relatively inexpensive and readily available, making them the primary energy source.

Front

What is the SI unit for measuring energy and work?

Back

The SI unit for energy and work is the joule.

Front

Is combustion necessary for gasoline-powered cars to operate?

Back

True, combustion is needed for cars that run on gasoline to move.

Front

What is combustion?

Back

Combustion is a chemical reaction that occurs when a substance reacts rapidly with oxygen, producing heat and light.

Front

What are fossil fuels?

Back

Fossil fuels are natural substances formed from the remains of ancient plants and animals, including coal, oil, and natural gas.

Front

What is the difference between renewable and non-renewable energy sources?

Back

Renewable energy sources can be replenished naturally (like solar and wind), while non-renewable sources (like fossil fuels) are finite.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter, related to the kinetic energy of particles.

Front

What is the principle of conservation of energy?

Back

The principle of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another.