3 (c) States of Matter
The universe is made of matter. Matter is stuff, things you can touch. A type of matter is called a medium. Matter is anything that has mass (or inertia) and takes up space (meaning volume). Some energy like sound can only travel through a medium or matter. Other energy like light and UV can travel through empty space.
Matter comes three ways, what we call phases. Or we call them states- solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume but NOT a definite shape. A gas does NOT have a definite volume or shape. We can compress or expand gas. Compressed gas is how we make our paper rocket fly.
Matter comes three ways, what we call phases. Or we call them states- solid, liquid, and gas. Solids have a definite shape and volume. Liquids have a definite volume but NOT a definite shape. A gas does NOT have a definite volume or shape. We can compress or expand gas. Compressed gas is how we make our paper rocket fly.
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