Unit 3 Practice Changes in Matter

Water vapor is forming a liquid on the outside of this glass because the vapor.

• loses heat when it touches the glass
• pulls cooler liquid through the glass
• becomes warmer close to the glass

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

A copper penny turning greenish after a few years is an example of ...

• Chemical Change
• Physical Change

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NGSS.MS-PS1-2

Joey wanted to make elephant toothpaste by mixing hydrogen peroxide and dish soap. The picture shows what happened. What type of change took place?

• A chemical change

• A physical change

• An endothermic change

• An exothermic change

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

In all chemical changes :

• Heat is released

• Gas is released

• A new substance forms

• the process substances can be separated

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Ionic bonds are between...

• Metal and Non-metal
• Non-metal and Non-metal
• Metal and Metal

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NGSS.HS-PS1-2

Atoms are most stable when their outer shell is complete.

• true
• false

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

How are covalent bonds formed?

• Sharing of electrons
• Transfer of electrons

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NGSS.HS-PS1-1

How many atoms are there TOTAL in H₂SO₄ ?

• 6

• 5

• 7

• 3

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NGSS.MS-PS1-1

How many Nitrogen atoms are in (NH₄)₂CrO₄?

• 1

• 2

• 8

• 16

Tags

NGSS.MS-PS1-1

Salt stirred in water makes a new chemical compound

• True

• False

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NGSS.MS-PS1-2

NGSS.MS-PS1-5