Amplify Chemical Reactions

A scientist mixed two samples together: a colorless liquid that melts at 12°C and a yellow solid that melts at 390°C. She analyzed the results and found two ending substances. One of the ending substances was a gray 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 the scientist mixed together?

• 
• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A company that makes frying pans needs to create a new substance to coat the pans. The substance must have a high melting point. To create this new substance, workers mixed together two substances that melt at low temperatures in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, the workers found two substances that melt at higher temperatures 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?

• 
• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A scientist mixed two samples together: a white solid that boils at about 800°C and a colorless gas that boils at about 70°C. He analyzed the results and found two ending substances. One of the ending substances boils at 245°C. 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 the scientist mixed together?

• 
• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Andres is a chemist working at a company that makes ink. To make a new kind of ink, Andres mixed two liquid substances together in a sealed container. The diagram above shows the repeating groups of atoms that make up the two starting substances.

After mixing, Andres found two solid 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?

• 
• A

• B

• C

• D

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

​ (a)   ​ a process in which atoms rearrange to form new substances

• chemical reaction

• circulatory system

• claim

• digestive system

Tags

MS-LS1-1

MS-LS1-2

MS-LS1-3

MS-LS1-7

MS-LS1-8

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

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

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

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

There are many signs to watch for to see if a chemical reaction has taken place. There might be a permanent ​ (a)   change such as when wood burns. The ​ (b)   might change when two substances create their own heat. A ​ (c)   might form when a solid is created inside of a liquid. A ​ (d)   might be produced if you see bubbles forming.

• color

• temperature

• precipitate

• gas

Tags

NGSS.MS-PS1-2

🔬🎉 Let's dive into the world of chemistry with Nate and Melanie! Can you identify which of these exciting examples are actually chemical changes? Put on your scientist hat and choose 3 answers wisely! 🧪👩‍🔬

• Breaking a piggy bank

• fireworks exploding

• getting a haircut

• melting icicle

• hammering metal

• mixing baking soda and vinegar

• a rusty nail

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Olivia and Mason were having a science experiment in the kitchen. Olivia left a glass of milk on the counter overnight as part of their experiment. The next day, they discovered it had gone sour. This is a (a)   change.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2