This book provides an overview of solids, liquids and gases and offers a simple activity which allows students to observe a chemical reaction.

Chemical Reactions Hatch a Rubber Egg

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Pay close attention. Watch what happens to the egg shell.&#160;

That's right, Tilly!&#160; The acid reacts with the calcium carbonate shell. As the shell dissolves, it forms carbon dioxide gas.

Hey, I see BUBBLES in my glass! They're filled with gas...right?

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Yes! Let's Hatch a Rubber Egg!

START HERE 1. Make sure a parent is available to help.

2. You will need a raw egg, vinegar, plastic wrap, and a glass.

4. Pour vinegar into the glass until it covers the egg.

5. Cover the glass with plastic wrap. Let it sit for 24 hours.

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6. After 24 hours, pour out the vinegar, replace it with fresh vinegar, and wait another 24 hours.

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Chemicals can also cause a change in the state of matter – for example,&#160; acetic acid found in vinegar.

Lemon juice is an acid too. I remember testing it with pH paper in 4th grade!

Can we do an experiment to learn more about chemical reactions?

I told a chemistry joke once...... but it got no reaction.

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Hmm....do you mean that a solid can change into a liquid or a gas?

Yes, heat melts solid ice and causes it to change to water. Heat also causes water to evaporate and become a gas.

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We are studying how matter can change states!

To learn more about chemistry read: "Backyard Chemistry Experiments" by Alix Wood <a href="https://www.getepic.com/app/read/63251">https://www.getepic.com/app/read/63251</a> "30-Minute Chemistry Projects" by&nbsp;Anna Leigh <a href="https://www.getepic.com/app/read/65013">https://www.getepic.com/app/read/65013</a>

It's reversible too! If you freeze cream, it changes to ice-cream. And ice-cream melts back to cream on a hot day!

You are both correct! Heat can cause both reversible and irreversible chemical reactions.

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But.. if I accidentally burn my toast in the toaster,&#160;I cannot reverse it.

After 48 Hours... 1. Make sure a parent is available to help. 2. Uncover the glass and carefully pour out the vinegar. 3. Replace the liquid with water to rinse off the remaining vinegar. 4. Gently pour the egg out into your hand. Questions: What do you notice about the egg? How does the egg feel? What happened to the egg shell?

Can you explain what happened to the egg in your own words? Use the words solid, liquid and gas in your explanation.