Studyfin Studyfin ✨ Sign up free

States of matter

Grade 3 · Science · Free lesson

Hi there! I am Studyfin, your science friend. Today we will explore the states of matter together!

Everything around us is made of matter. Matter can be a solid, a liquid, or a gas. We call these the states of matter.

traffic signs

Before you read, look at the title and pictures. What do you think you will learn? Asking questions helps us understand.

? Ask Questions as You Read!

A solid has a shape that stays the same. The tiny parts inside a solid are packed very close together. They can only wiggle in place.

Solid: Packed Close and Wiggling

A liquid flows and takes the shape of its container. The tiny parts can slide past each other. This is why liquids can pour.

Liquid: Sliding and Flowing
✏️ Worked example

We want to read a story about a puddle that vanishes on a hot day. Let us practice using our reading skills to make a prediction!

  1. Look at the clues. The title is 'The Disappearing Puddle.' There is a picture of a bright, hot sun.
  2. Ask a question before reading: 'Where does the water in the puddle go when it gets hot?'
  3. Recall your science facts. When liquid water gets hot, it turns into gas.
  4. Make a prediction using the clues. Predict that the liquid puddle will turn into a gas and go into the air.
  5. Read the story to check your prediction. The story says the sun warmed the water and it evaporated. Our prediction was correct!
question mark
Want the full interactive lesson — quiz, animations, and Finn cheering them on?

More Science lessons