Chemical Reaction

What happens when you cook an egg?

• It stays the same.

• It becomes a liquid.

• It undergoes a chemical reaction.

• It turns into a gas.

What is a sign that a chemical reaction is happening?

• The substance becomes cold.

• The substance makes a sound.

• The substance changes color.

• The substance disappears.

What might you see when a chemical reaction produces a gas?

• The substance glowing.

• Bubbles forming.

• The substance melting.

• The substance freezing.

What is a precipitate in a chemical reaction?

• A solid that forms.

• A gas that forms.

• A liquid that evaporates.

• A color that changes.

What happens when you ignite magnesium?

• It becomes invisible.

• It turns into water.

• It produces a lot of heat.

• It cools down.