Energy Conservation and Transformations

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the energy that comes from the movement of atoms and molecules in a substance. An example is the heat produced by burning logs.

Front

What energy transformation occurs in a toaster?

Back

In a toaster, the energy transformation that occurs is from electric energy to thermal energy, as the electric current heats the coils to toast the bread.

Front

When does a pendulum have the most kinetic energy?

Back

A pendulum has the most kinetic energy at the bottom of its swing, where it is moving the fastest.

Front

What is the Law of Conservation of Energy?

Back

The Law of Conservation of Energy states that energy can be transformed from one form to another, but it cannot be created or destroyed.

Front

What is mechanical energy?

Back

Mechanical energy is the sum of kinetic energy (energy of motion) and potential energy (stored energy) in an object.

Front

Define kinetic energy.

Back

Kinetic energy is the energy of an object due to its motion. It depends on the mass and velocity of the object.

Front

Define potential energy.

Back

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

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 energy sources are finite and cannot be replaced (e.g., coal, oil).

Front

What is energy transformation?

Back

Energy transformation is the process of changing energy from one form to another, such as converting chemical energy in food to kinetic energy when we move.

Front

What is an example of energy conservation?

Back

An example of energy conservation is using energy-efficient appliances that use less electricity to perform the same tasks.