4th grade unit 1- energy, speed, circuits, and natural resources

Front

What is energy?

Back

Energy is the ability to do work or cause change. It can exist in different forms, such as kinetic energy (energy of motion) and potential energy (stored energy).

Front

What is kinetic energy?

Back

Kinetic energy is the energy an object has due to its motion. The faster an object moves, the more kinetic energy it has.

Front

What is potential energy?

Back

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

Front

What is a circuit?

Back

A circuit is a closed loop that allows electricity to flow. It consists of a power source, wires, and a device that uses electricity, like a light bulb.

Front

What happens when a switch in a circuit is closed?

Back

When a switch is closed, it completes the circuit, allowing electricity to flow and power devices like light bulbs.

Front

What is the role of a battery in a circuit?

Back

A battery provides the electrical energy needed to power the circuit. It converts chemical energy into electrical energy.

Front

What is the source of energy for wind turbines?

Back

The source of energy for wind turbines is wind. The kinetic energy of the wind turns the blades of the turbine, generating electricity.

Front

What is friction?

Back

Friction is a force that opposes the motion of objects sliding against each other. It can slow down moving objects.

Front

What happens when two moving objects collide?

Back

When two moving objects collide, energy is transferred between them, causing changes in their motion.

Front

What is light energy?

Back

Light energy is a form of energy that is visible to the human eye. It is produced by sources like the sun and light bulbs.