Matter Mixup: What's a Solid?
When matter is in a solid state, its molecules are packed close together so they can't move around. This creates a stable structure with a definite size and shape. Teach your child about this first state of matter with this colorful worksheet. Can your child figure out which of the items pictured are solids?
Check out What's a Liquid? and What's a Gas? to learn about the other two states of matter.