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CA1 Review - Chemistry - 8th Grade

Total questions: 85

Worksheet time: 1hrs 4mins

Name
Class
Date
1.
Why does ice float?
a)
Liquid water is less dense than solid water.
b)
Solid water is less dense than liquid water.
c)
Gaseous water is less dense than solid water.
d)
Liquid water is less dense than gaseous water.
2.
Put the liquids in order from most dense to least dense?
a)
4, 3, 2, 1
b)
1, 2, 3, 4
c)
3, 4, 2, 1, 
d)
4, 3, 1, 2
3.
What is the formula for density?
a)
density = mass x volume
b)
density = mass / volume
c)
density = mass + volume
d)
density = mass - volume
4.
In the picture, the mass of the block is 200 g, the dimensions of the block are 6 cm by 4 cm by 5 cm.  What is its density?
a)
1.67g/cm3
b)
13.33 g/cm3
c)
0.60 g/cm3
d)
 24000 g/cm3
5.

Which box has a higher density?

a)

A

b)

B

c)

They are the same

6.
An irregularly shaped piece of gold was lowered into a graduated cylinder holding a volume of water equal to 17 ml. The height of the water rose to 20 ml. If the mass of the gold was 27 g, what was its density?
a)
9 g/mL
b)
10.5 g/mL
c)
6.5 g/mL
d)
8 g/mL
7.

An object is is placed into 45 mL of water. The water rises to 48 mL. What is the volume of the object?

a)

3 mL

b)

93mL

c)

8 mL

d)

83 mL

8.
What is the volume of 150 grams of lead if it has a density of 11.3 g/cm3?
a)
13.3 g
b)
13.3 cm3
c)
.075 g
d)
1695 cm3
9.
What is the mass of a substance with a volume of 72.5 cm3 and a density of 0.94 g/cm3?
a)
68.15 g
b)
77.13 g
c)
62 g
d)
100 g
10.

Which term is missing?

a)

Compounds

b)

Metals

c)

Molecules

d)

Solutions

11.

Which drawing shows a single compound?

a)

A

b)

B

c)

C

d)

D

12.

Which TWO drawings represent an element?

a)

A

b)

B

c)

C

d)

D

13.

A mixture in which the composition is NOT uniform throughout is called a _____ mixture.

a)

Heterogeneous

b)

Homogeneous

14.

What type of mixture is shown?

a)

Homogeneous

b)

Heterogeneous

15.

What type of substance is shown?

a)

compound

b)

heterogeneous mixture

c)

homogeneous mixture

d)

element

16.
Substance that consists of one type of atom.  It is a pure substance. Found on the Periodic Table. 
a)
Element
b)
Compound
c)
Mixture
d)

Molecule

17.

Combinations of 2 or more pure substances (elements and compounds) that are physically blended together. 

a)
Compound
b)
Mixture
c)
Element
d)
Substance
18.

Match the following particle visualizations

a)
1.

Homogeneous Mixture

b)
2.

Heterogeneous Mixture

c)
3.

Pure Substance

19.

Match the following substances with the correct type of matter.

a)
1.

Pure Substance

b)
2.

Homogeneous Mixture

c)
3.

Heterogeneous Mixture

20.

4CF2Cl2

a)

C = 4, F = 4, Cl = 2

b)

C = 1, F = 8, Cl = 8

c)

C = 4, F = 8, Cl = 8

d)

C = 1, F = 4, Cl = 8

21.
How many O's are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
22.

Match the element to the number of atoms it has.

2 Al(C2H3O4)2

a)

aluminum

1.

2

b)

carbon

2.

8

c)

hydrogen

3.

12

d)

oxygen

4.

16

23.

2 CH2CO3OH

Number of C: ​ (a)  

Number of H: ​ (b)  

Number of O: ​ (c)  

Choose from the below words
4
6
8
2
3
1
5
7
9
10
24.
In chemical reactions, what does the principle of conservation of mass mean?
a)
Matter is not created or destroyed.
b)
The total mass of the reactants is greater than the total mass of the products.
c)
The total mass of the reactants is less than the total mass of the products.
d)
Matter is not changed.
25.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
26.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
27.

What does the number 4 represent in 4NH3?

a)

Subscript

b)

Superscript

c)

Coefficient

28.

In the equation shown, what are the product(s)?

a)

N2 + H2

b)

NH3

29.
Which is the name of the kind of solid substance formed in this figure?  
a)
aqueous 
b)
precipitate
c)
acid
d)
synthesis 
30.

An gel ice pack getting cold after you put it in the freezer for an hour.

a)

Chemical Change

b)

Physical Change

31.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
32.
The smell made from spraying perfume on yourself. 
a)
Chemical Change
b)
Physical Change
33.
What indicates a chemical reaction occurred?
a)
Heat or Light is released
heat or light is produced
b)
gas (bubbles) produced
c)
color change
d)
all of the above
34.

1. How is a chemical change different from a physical change?

a)

there is no difference

b)

a physical change creates a new substance

c)

a chemical change creates a new substance

35.
the starting materials in a chemical reaction
a)
Products
b)
Reactants
c)
Starters
d)
Enders
36.
Which of the following is a chemical change?
a)
the rusting of iron
b)
dissolving salt in water
c)
melting an ice cube
d)
bending a copper wire
37.
Your mother used pancake mix, eggs, and milk to make pancakes.  Which of these is the product?
a)
the pancake mix
b)
the eggs
c)
the milk
d)
the pancakes
38.

Boiling Water

a)

Physical Change

b)

Chemical Change

39.

What is the best definition of a chemical change?

a)

A change in the state of matter in which the form changes but the properties stay the same.

b)

A change in the state of matter in which the material changes into an entirely different material with properties that are different from the original material.

c)

A change in the state of matter in which the material is still the same just in a different form.

40.
Why is tearing a piece of paper only a physical change?
a)
It changes the paper. 
b)
It is hard to tear. 
c)
It only changes its size, but it's still paper
d)
None of the above
41.
Which of the following models best demonstrates a balanced chemical equation?
a)
F
b)
G
c)
H
d)
J
42.

How many elements are present in this compound? (Careful!)

Mg2As3COHNi2

a)

2

b)

4

c)

6

d)

10

43.
How many atoms of Oxygen are in Fe(NO3)3 ?
a)
6
b)
3
c)
9
d)
1
44.

Look at the chart. Which answer choice correctly describes the chart?

a)

Column A describes metals

b)

Column A describes nonmetals

c)

Column B describes metalloids

d)

Both Column A and Column B describe metals

45.

Match the properties to the correct type of element.

Categorize the following

Shiny Luster

Dull

Either shiny or dull

Semiconductor

Insulator

Conductor of heat and electricity

Malleable

Brittle

Either Malleable or brittle

Metals
Nonmetals
Metalloids
46.

A student was doing an investigation. Below are the observations before and after the investigation.


Which observation provides evidence that a new substance formed in the beaker after the investigation?

a)

Observation 1

b)

Observation 1 & 4

c)

Observation 2 & 3

d)

A new substance was not formed

47.
One property of a nonmetals is that it is a good conductor of electricity?
a)
true
b)
false
48.
All of the following would classify an element as a metal except?
a)
Dull
b)
Luster
c)
Malleable
d)
Hard
49.
Some characteristics of a metal are that it is malleable and ductile.
a)
TRUE
b)
FALSE
50.
Which of the following properties refers to the ability of metals to be drawn into wires?
a)
A. malleability 
b)
B. compressibility
c)
C. ductility
d)
D. luster
51.
If a substance breaks easily, it is said to be ________________.
a)
A. Magnetic
b)
B. Brittle
c)
C. Conductive
d)
D. Ductile
52.
Metals appear to the _______ of the dark ziz-zag line on the periodic table. 
a)
A. right
b)
B. middle
c)
C. left
53.
Anytime you see the word SEMICONDUCTOR - what substance do you have?
a)
Metal
b)
Nonmetal
c)
Metalloid
54.
Nonmetals occur to the ________of the dark zig-zag on the periodic table. 
a)
A. right
b)
B. middle
c)
C. left
55.

UP and DOWN columns on the periodic table are

a)

groups

b)

periods

56.

SIDE TO SIDE rows on the periodic table are

a)

groups

b)

periods

57.

The period for Bromine is ___________.

a)

3

b)

2

c)

4

d)

5

58.

Period 4, Group 15

(a)  

59.

Period 2, Group 17

(a)  

60.
The tightness across the surface of water that enables paper clips to float is ____________.
a)
adhesion
b)
capillary action
c)
surface tension
d)
polarity
61.

Cohesive means ........

a)

the water molecules stick to each other

b)

the water molecules stick to other surfaces

c)

the water molecules are less dense

d)

the water molecules are far apart

62.

Adhesive means ........

a)

the water molecules stick to each other

b)

the water molecules stick to other surfaces

c)

the water molecules are less dense

d)

the water molecules are far apart

63.

Water striders can walk on water because of ____________.

a)

capillary action

b)

adhesion

c)

surface tension

d)

universal solvent

64.
Water droplets take a spherical shape (as pictured) because of ____________
a)
adhesion
b)
cohesion
c)
capillary action
d)
solubility
65.
Water moves through plant roots and in other substances with pores because of ___________.
a)
surface tension
b)
polarity
c)
capillary action
d)
gravity
66.
As you added drops to the coins, each drop stuck to the other water because of ________________.
a)
adhesion
b)
cohesion
c)
capillary action
d)
specific heat
67.
A molecule in which opposite ends have opposite electric charges is a:
a)
cohesion
b)
polar molecule
c)
hydrogen bond
d)
solution
68.
The pH scale is a range from:
a)
1-7
b)
0-14
c)
1-14
d)
1-20
69.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
70.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
71.
What is the only substance with a neutral pH of 7?
a)
Milk
b)
Orange Juice
c)
Water
d)
Blood
72.
Which solution releases H+ in solution?
a)
Base
b)
Acid
c)
Buffer
d)
Water
73.
This substance releases OH- into solution
a)
Acid
b)
Base
c)
Neutral
74.
A solution with a pH of 3.6 would be...
a)
Acid
b)
Base
c)
Neutral
d)
Acid and Base
75.
Which is most acidic?
a)
Baking Soda
b)
Lemon Juice
c)
Black Coffee
d)
Milk
76.
Tastes Sour
a)
Acids
b)
Bases
c)
Salts
d)
All
77.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
78.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
79.
Bleach is a strong base, what is the pH level of bleach?
a)
13
b)
14
c)
1
d)
2
80.

The pH scale is used to measure how acidic or basic something is. A pH value lower that 7 indications a substance is an​ (a)   , while a pH value higher than 7 is considered ​ (b)   . Pure water is considered ​ (c)   , with a pH of ​ (d)   .​

Choose from the below words
acid
basic
neutral
7
1
14
hydrogen
81.
What color does acid turn litmus paper?
a)
It turns litmus paper purple.
b)
It turns red litmus paper blue.
c)
It turns blue litmus paper blue.
d)
It turns blue litmus paper red.
82.
What color does bases turn litmus paper?
a)
It turns litmus paper purple.
b)
It turns blue litmus paper red.
c)
It turns red litmus paper blue.
d)
It turns red litmus paper re
83.
What is another name for base?
a)
Sugar
b)
Alkaline
c)
Acid
d)
pH
84.
A pH of 14 is a .....
a)
strong acid
b)
weak acid
c)
Strong base
d)
Weak base
85.

When an acid and a base are mixed, what is the reaction called?

a)

Neutralization

b)

Hydrolyzed

c)

Hydro Ionization

d)

A salt and a water reaction

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