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STAAR Chemistry Review Day 2

STAAR Chemistry Review Day 2

Assessment

Presentation

•

Science

•

8th Grade

•

Medium

•
NGSS
MS-PS1-1, MS-PS1-5, MS-PS1-2

+1

Standards-aligned

Created by

Meagan E Mcdermott

Used 22+ times

FREE Resource

11 Slides • 21 Questions

1

Multiple Choice

What cannot be broken down into other substances?
1

Compound

2

Element

2

Multiple Choice

What is made up two or more elements that are chemically combined?
1

Element

2

Mixture

3

Compound

4

Solids

3

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What would the
chemical formula be
for 1 atom of
Helium?

What would the
chemical formula be
for 2 atoms of
oxygen?

What would the chemical
formula be for 2 atom of
hydrogen bonded with 1
atom of oxygen?

4

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1 atom of

Helium = He

2 atoms of

Oxygen

= Oâ‚‚

2 atoms of Hydrogen

+ 1 atom Oxygen

= Hâ‚‚O

What do you notice is different about the
formula for the compound vs the formulas

for the elements?

5

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1 atom of

Helium = He

2 atoms of

Oxygen

= Oâ‚‚

2 atoms of Hydrogen

+ 1 atom Oxygen

= Hâ‚‚O

Elements have 1 capital letter in their symbol.

Compounds have 2 or more DIFFERENT capital letters.

6

Multiple Select

Which two of these are elements?

1

Water (H2O)

2

Hydrogen (H2)

3

Salt 🧂 (NaCl)

4

Iron (Fe)

5

Carbon dioxide (CO2)

7

Multiple Select

Which two of these are compounds?

1

Au

2

Cl

3

NaCl

4

CO2

8

Multiple Choice

Which of the following represents an element?
1

H2O

2

H2

3

NaCl

4

CaCO3

9

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10

Multiple Choice

How many elements are in C6H12O6?
1

1

2

2

3

3

4

4

11

Multiple Choice

How many atoms of Carbon are in this formula? C6 H12O6C_{6\ }H_{12}O_6  

1

6

2

1

3

12

12

Multiple Choice

What is the total number of atoms in this formula? H2O2H_2O_2  

1

2

2

4

3

3

13

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14

Multiple Choice

How many Hydrogen are in 4H2O?
1

6

2

8

3

2

4

4

15

Multiple Choice

How many Sodium (Na) are in 6NaCl?
1

1

2

12

3

6

16

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17

Multiple Choice

How many O's are in Al₂(SO₄)₃
1

4

2

12

3

7

4

24

18

Multiple Choice

Number of H in 3(NHâ‚„)â‚‚CrOâ‚„
1

4

2

2

3

8

4

24

19

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Law of Conservation of Mass

➢

Chemical Equations, like above, must be balanced.
Meaning, if you start with 1 atom of carbon on the

reactant side, you should end with 1 atom of carbon on

the product side.

20

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Let’s check if this chemical equation is

balanced or unbalanced.

21

Multiple Choice

Is this equation balanced?

HCl + NaOH --> NaCl + H2O

1

yes

2

no

22

Multiple Choice

Is this equation balanced?

H3PO4 + KOH --> K3PO4 + H2O

1

yes

2

no

23

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24

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Unexpected Color Change

Light

Evidence of Chemical Change

Gas

Unexpected

Temperature Change

Odor (smell)
Precipitate

25

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26

Multiple Choice

Which of the following is an example of physical change?

1

Mixing baking soda and vinegar together, and this causes bubbles and foam.

2

A glass cup falls from the counter and shatters on the ground.

3

Lighting a piece of paper on fire and the paper burns up and leaves ashes.

4

Baking a birthday cake for your mother.

27

Multiple Choice

Which of the following is an example of chemical change?

1

Filling up a balloon with hot air.

2

Taking a glass of water and freezing it by placing it in the freezer.

3

A plant collecting sunlight and turning it into food.

4

Your dog ripping up your homework.

28

Multiple Choice

When a new substance is formed with different properties than the original substance it is called a

1

Chemical change

2

Physical change

3

Freezing

4

Boiling

29

Multiple Choice

Which is an example of a physical change?

1

Metal rusting

2

Silver tarnishing

3

Water boiling

4

Paper burning

30

Multiple Choice

Which is an example of chemical change?

1

Water freezes

2

Wood is cut

3

Bread is baked

4

Wire is bent

31

Multiple Choice

Which is not a clue that could indicate a chemical change?

1

Change in color

2

Change in shape

3

Change in energy

4

Change in odor

32

Multiple Choice

When you swallow your food and the food is then getting digestive in stomach acid and different enzymes, that is considered___________.

1

mechanical digestion

2

chemical digestion

What cannot be broken down into other substances?
1

Compound

2

Element

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MULTIPLE CHOICE