Chemical Reactions Review

Fireworks Exploding are a ________ change.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical reaction accompanied by the absorption of heat. 

• Chemical Change

• Physical Change

• Endothermic Reaction

• Exothermic Reaction 

A chemical reaction accompanied by the releasing of heat. 

• Endothermic

• Exothermic

• Mesothermic

• Misothermic

Which is a chemical property 

• Reactivity 

• Solid

• Color

• Shape

What is the evidence of the chemical change seen here?

• Color change

• Light produced

• state change

• mixture

Tags

NGSS.MS-PS1-2

A characteristic that can only be determined by changing the identity of an object. 

• Physical Change

• Chemical Change

• Chemical Property 

• Physical Property 

A scientist mixed two samples together. She analyzed the results and found two ending substances. One of the ending substances 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?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

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 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

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?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Andres is a chemist, he 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?

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Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5