By Meghan Marfise Grade 3 CA content standard: Physical Science. (E) Students know matter has three forms: solids, liquid, and gas.

States of Matter All materials are made of very small particles that are held together by force. These materials are put into 1 of 3 categories Solids Liquids Gases

Solids Keep one definite shape Do not move or flow Firm or compact Particles are very close together so they can hardly move

Liquids Move or flow Change their shape Take the shape of their container Particles are not as tightly packed, so they can move a little Take up the same amount of space, even when their container changes

Gases Change their shape and can be squashed Spread out freely Particles are spread out and can move easily Spread out into all of the surrounding area

Ms. Marfise’s Lesson

Temperature Can change the state of matter Heating Will change a material from a solid -> Liquid -> Gas

Temperature: Cooling Cooling Will change a material from a gas -> Liquid -> Solid

Examples Water can be either a Solid, Liquid, or Gas Solid= ice Liquid=water Gas=water vapor

References Pictures from: BBC - KS2 Revisewise - Science: Materials aterials/ aterials/ Camera Woman: Genein M. Jefferson Animated Pictures: – –