Chemical Reactions Amplify

Tiana is a chemist who is making a chemical to add to swimming pools in order to make the water safer. She mixed two solid substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, Tiana found two liquid 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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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Damian mixed two samples together: a red liquid that smells irritating and a black solid with no smell. He analyzed the results and found two ending substances. One of the ending substances was a yellow solid. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Damian mixed together?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Marisol mixed two samples together: a brown liquid with no smell and a colorless gas that smells irritating. She analyzed the results and found two ending substances. One of the ending substances smelled sweet. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples Marisol mixed together?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Elements or compounds that enter into a chemical reaction

• Reactants

• Products

• Catalysts

• Inhibitors

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is an example of a chemical reaction involving a gas?

• Boiling water

• Inflating a balloon

• Baking soda reacting with vinegar

• Melting wax

Tags

NGSS.MS-PS1-2

In a chemical reaction, what are the substances called that start the reaction?

• Products

• Reactants

• Catalysts

• Enzymes

Tags

NGSS.MS-PS1-1

Bubbles form when two or more substances are combined is a (a)   (b)  

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

Which of the following is a chemical change?

• Melting ice

• Dissolving salt in water

• Burning wood

• Freezing water

Answer explanation

Burning wood is a chemical change because it involves a chemical reaction that changes the composition of the wood, unlike melting ice, dissolving salt in water, or freezing water which are physical changes.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, what happens to the total mass of the reactants and products?

• It increases.

• It decreases.

• It remains the same.

• It cannot be determined.

Tags

NGSS.MS-PS1-5