3rd Grade Physical Science Review

Mass is the amount of matter in an object, usually measured in grams or kilograms.

Energy is the ability to do work or cause change. It can exist in different forms, such as electrical, thermal, or mechanical.

Thermal energy is the energy that comes from the temperature of matter. The hotter the substance, the more thermal energy it has.

Freezing is the process where a liquid turns into a solid when it loses heat.

Absorption is the process where materials take in light and change it into heat.

Volume is the amount of space that an object occupies, usually measured in liters or cubic centimeters.

Evaporation is the process where a liquid changes into a gas, usually when it is heated.

Condensation is the process where a gas changes into a liquid, often when it cools down.

Reflection is when light bounces off a surface, like a mirror.

Refraction is the bending of light as it passes from one material to another, like when light passes through water.