Energy Review - 7th Grade

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object possesses due to its motion. It depends on the mass of the object and the speed at which it is moving.

Front

What is potential energy?

Back

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

Front

How does energy transform from potential to kinetic?

Back

As an object falls or moves downwards, its potential energy decreases while its kinetic energy increases, demonstrating the conservation of mechanical energy.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of kinetic and potential energy in an object. It represents the total energy of motion and position.

Front

What happens to a cart's mechanical energy at the top of a hill?

Back

At the top of a hill, a cart has maximum potential energy and minimum kinetic energy, meaning its mechanical energy is all potential.

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 kinetic energy in everyday life?

Back

A bird in flight is an example of kinetic energy, as it is moving and has energy due to its motion.

Front

What happens to potential energy as an object rolls down a hill?

Back

As an object rolls down a hill, its potential energy decreases while its kinetic energy increases.

Front

What is gravitational potential energy?

Back

Gravitational potential energy is the energy an object possesses because of its height above the ground, calculated as weight times height.

Front

What is the relationship between speed and kinetic energy?

Back

Kinetic energy increases with the square of the speed; if the speed doubles, the kinetic energy increases by four times.