Energy and Energy Transformations

Front

What is potential energy?

Back

Potential energy is the stored energy in an object due to its position or state. For example, a swing at the highest point has potential energy.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of motion. Any object that is moving has kinetic energy.

Front

What device transforms electrical energy into mechanical energy?

Back

A fan transforms electrical energy into mechanical energy.

Front

Describe the energy transformations in a flashlight that runs on batteries when turned on.

Back

The energy transformations are chemical to mechanical to electrical to radiant.

Front

What energy transfer occurs when food is digested?

Back

The energy transfer that occurs when food is digested is chemical to mechanical.

Front

What is the law of conservation of energy?

Back

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

Front

What is an example of energy transformation in a hydroelectric power plant?

Back

In a hydroelectric power plant, potential energy of water stored in a dam is transformed into kinetic energy as it flows down, which is then converted into electrical energy.

Front

What is thermal energy?

Back

Thermal energy is the total kinetic energy of particles in a substance, related to its temperature.

Front

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

Back

Renewable energy sources can be replenished naturally (e.g., solar, wind), while non-renewable sources (e.g., coal, oil) are finite and will eventually deplete.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of potential and kinetic energy in an object that is used to do work.