The Three States of Matter

18 min
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Everything around you — a brick, your juice, the air you breathe — is made of matter. Matter is anything that takes up space and has mass.

Matter comes in three states, and we tell them apart by how they behave:

  • Solid: keeps its own shape and its own size. A brick stays a brick whether it is on the ground or in a box.
  • Liquid: takes the shape of its container but keeps the same amount. You can pour it. Juice poured from a bottle into a glass takes the glass's shape.
  • Gas: spreads out to fill the whole container, with no fixed shape or size. The air pumped into a soccer ball fills every part of it.

Which of these is a property of a solid?

Which state of matter takes the shape of its container, keeps the same amount, and can be poured?

Which of these is a gas at room temperature?

Complete the sentence: Matter is anything that takes up space and has ______.