Chemical Reactions Unit 4 Quiz Study

What is a chemical change?

• Forming a new substance

• When two or more substances combine to make a greater one

• When two or more substances combine to make a new chemical substance

• Combing substances

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NGSS.MS-PS1-2

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What is a physical change?

• I Don't care!

• A change in the form or appearance of a substance

• a change in a substance to something new

• molecules interacting and changing into a new substance

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NGSS.MS-PS1-4

Which is an example of a chemical change?

• Cutting paper

• Digesting Food

• Crumbling paper

• Boiling water

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NGSS.MS-LS1-7

NGSS.MS-PS1-2

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Which is an example of a physical change?

• Cooking

• Buring Wood

• Ripping paper

• Digesting Food

Is this a Chemical or a Physical change?

Fireworks

• Chemical

• Physical

• Both

• Neither

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NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Chemical or Physical change?

Ice melting

• Chemical

• Physical

• Neither

• Both

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NGSS.MS-PS1-2

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The Law of Conservation of Matter

• tells how many atoms of an element are contained in one molecule or formula unit.

• the starting materials in a chemical reaction

• the new substances that are formed in a chemical reaction

• A law stating that atoms are not created or destroyed during a chemical reaction.

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NGSS.MS-PS1-5

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

• yes

• no

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NGSS.MS-PS1-5

Balance this equation

_Al +_HCl --> _H₂ +_AlCl₃

• 2,6,3,2

• it's already balanced

• 4,12,3,4

• 2,1,4,5

Tags

NGSS.MS-PS1-5

The coefficient in 3H₂O is

• 6

• 5

• 2

• 3

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NGSS.MS-PS1-1