SS SC 6-8 Lesson 2D: Slime Chemical Reactions

Multiple Select

Which of the following are signs of a chemical reaction?

• Formation of a gas

• A change in temperature

• A change in color

• A change in size

Multiple Choice

In a chemical reaction, the number of atoms in the reactants and the products...

• Must be the same

• Must be different

Multiple Choice

Which of these is NOT a sign of a chemical reaction?

• A phase change

• Formation of a precipitate

• A color change

• A temperature change

Open Ended

When you combine baking soda and vinegar the reaction produces bubbles. Explain how you know that this is a chemical reaction.

Multiple Choice

You have a beaker full of water. If you add a solid substance to the beaker and the water level rises, is this a chemical reaction? Why or why not?

• Yes because it is a mixture now.

• No because there was no sign of a chemical reaction.

• Yes because the water moved.

• No because the temperature changed.

Multiple Choice

You have 2 chemicals, CHEMICAL A and CHEMICAL B. They are both liquids. When you combine them you notice some crystals starting to form within them. Did a chemical reaction occur?

• Yes

• No