Category 2- Force, Motion and Energy STAAR release

Front

What is mechanical energy?

Back

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

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

Front

What is light energy?

Back

Light energy is a form of energy that is visible to the human eye. It is produced by the vibration of electrically charged particles.

Front

What is electrical energy?

Back

Electrical energy is the energy caused by the movement of electrons. It is used to power devices and appliances.

Front

What happens to light when it travels from water to air?

Back

When light travels from water into air, it changes direction due to refraction.

Front

What is a closed circuit?

Back

A closed circuit is a complete electrical circuit through which current can flow.

Front

What is an open circuit?

Back

An open circuit is a broken electrical circuit where current cannot flow.

Front

What is the principle of reflection of light?

Back

The principle of reflection states that when light hits a reflective surface, it bounces back at the same angle.

Front

What is the difference between potential energy and kinetic energy?

Back

Potential energy is stored energy based on an object's position, while kinetic energy is the energy of an object in motion.

Front

What is the role of switches in an electric circuit?

Back

Switches control the flow of electricity in a circuit by opening (turning off) or closing (turning on) the circuit.