Physical Science 4th Grade Quarter 1

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

Sunlight transfers energy to the water, increasing its temperature.

The thermal energy of the water in the shade stays the same because it is not receiving energy from sunlight.

A circuit is a closed path through which electric current flows.

A switch opens or closes a circuit, controlling the flow of electric current.

Kinetic energy is the energy of an object in motion. The faster an object moves, the more kinetic energy it has.

The ball with the highest speed has the most kinetic energy.

Conductors are materials that allow electric energy to flow through them easily.

Scissor blades and metal keys are examples of conductors.

Light energy can increase the temperature of objects it shines on.