Making Predictions: Sink or Float

What You'll Learn

Cotton absorbs water, but plastic does not. That is why raincoats are made of plastic!

Step 1 — Read

Read the introduction. What is this lesson about?

Step 2 — Do

Mix salt into warm water and cold water. Stir 20 times each. Which dissolves faster?

Step 3 — Observe

Look for something that changed. What is it?

Step 4 — Record

Circle the correct answer on your worksheet.

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Is air made of matter?