NGSS.MS-PS1-2

Carrie's teacher hands out test tubes filled with different chemicals and tells the students to identify their liquid as an acid, base, or neutral chemical. Carrie's test tube contains a clear chemical. She adds phenolpthalein to her test tube and gently moves the tube from side to side. A few moments later, the chemical in the test tube turns bright pink.
What type of chemical does Carrie have?

• Carrie has a neutral chemical.
• Carrie has an acidic chemical.
• Carrie has a basic chemical.
• The type of chemical Carrie has cannot be determined.

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NGSS.MS-PS1-2

Josue goes to Silver River each week for 4 weeks and collects 5 samples of water to test the pH.

• repetition
• replication

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NGSS.MS-PS1-2

Hydrochloric acid reacts with potassium hydroxide to produce a salt, water,and heat.

• Chemical Change
• Physical Change

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NGSS.MS-PS1-2

mixing baking soda and vinegar

• chemical change

• physical change

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NGSS.MS-PS1-2

Which of the following is a sign that a chemical reaction has occurred?

• change in shape

• melting

• formation of a gas

• dissolving

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NGSS.MS-PS1-2

Which of the following DOES NOT indicate a chemical change/reaction is occurring?

• Color Change

• Formation of gas/bubbles

• Formation of a Precipitate

• State of matter change

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NGSS.MS-PS1-2

What is a reactant?

• Something that actanats again

• A starting substance before a chemical reaction

• A potato

• What happens when you have the reflexes of a ninja and can react quickly.

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NGSS.MS-PS1-2

Jin bought a heat pack that weighs 15 g. He shook it so it would release heat to warm his hands. The release of heat indicates a chemical reaction took place in a closed system. What would be the mass of the heat pack after the chemical reaction?

• 5 g

• 10 g

• 12 g

• 15 g

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NGSS.MS-PS1-2

Patrik works at a company that makes paper and needs a chemical to make the paper brighter. He mixed two colorless substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, Patrik found two white substances in the sealed container. (Nothing had escaped.) Which of the diagrams to the left shows the repeating groups of atoms that make up the ending substances?

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• 
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NGSS.MS-PS1-2

If the soil is acidic what we should do to make it neutral

• Add salt

• Add acid

• Add base

• Add sugar

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NGSS.MS-PS1-2