Chemical Reactions

Serena mixed two samples together: a gray solid that smells like flowers and a gray solid that smells like bleach. She analyzed the results and found two ending substances. One of the ending substances was a white 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 Serena mixed together?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

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?  

• Diagram A

• Diagram B

• Diagram C

• Diagram D

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?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Santiago is a chemist working to make a new kind of antacid, which is a medicine that helps with stomach pain. He mixed two powdery 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, Santiago 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?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the result of a chemical reaction?

• The starting materials disappear without a trace.

• New substances with different properties from the starting materials are formed.

• The physical state of the starting materials changes.

• The starting materials are recovered unchanged.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a reactant in a chemical reaction?

• A substance that is produced in the reaction.

• A substance that speeds up the reaction.

• A substance that is consumed in the reaction.

• A substance that remains unchanged in the reaction.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is an endothermic reaction?

• A reaction that releases heat.

• A reaction that absorbs heat.

• A reaction that produces light.

• A reaction that produces sound.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is a chemical reaction?

• A process where substances change into new substances with different properties.

• A process where substances are mixed but retain their original properties.

• A process where substances are dissolved in water.

• A process where substances are heated but do not change.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the result of a chemical reaction between vinegar and baking soda?

• Water

• Carbon dioxide gas

• Oxygen gas

• Hydrogen gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to the atoms in a chemical reaction?

• They are destroyed.

• They are rearranged to form new substances.

• They are created.

• They disappear.

Tags

NGSS.MS-PS1-5