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Review for Test 4 sem 1

Total questions: 34

Worksheet time: 30mins

Name
Class
Date
1.
What is the correct order (starting from the surface) of Earth's layers?
a)
crust, mantle, inner core, outer core
b)
mantle, outer core, inner core, crust
c)
inner core, outer core, mantle, crust
d)
crust, mantle, outer core, inner core
2.
Earth's inner core is
a)
a layer of hot rock
b)
a solid ball of iron and nickel
c)
a layer of liquid iron and nickel
d)
a layer of rock that forms Earth's outer skin
3.
Which layer of the earth is a pure liquid?
a)
crust
b)
mantle
c)
outer core
d)
inner core
4.
How does temperature change as you move from the crust to the core?
a)
it gets cooler
b)
it gets hotter
c)
it stays the same
d)
the core is frozen
5.
What layer is shown by letter B?
a)
Crust
b)
Mantle
c)
Outer core
d)
Inner core
6.
What layer is shown by letter A?
a)
Crust
b)
Mantle
c)
Outer core
d)
Inner core
7.
What layer is shown by letter C?
a)
Crust
b)
Mantle
c)
Outer core
d)
Inner core
8.
What part of the earth is a layer of rock that comprises 67% of Earth’s mass?
a)
mesosphere
b)
mantle
c)
asthenosphere
d)
lithosphere
9.
Which layer is the thinnest, least dense and most brittle?
a)
Mantle
b)
Inner Core
c)
Crust
d)
Outer Core
10.

What do we call the natural rock we mine to extract the minerals we need?

a)

Dirt

b)

Ore

c)

Sand

d)

Rubble

11.

Earth's mineral resources are distributed evenly throughout the Earth.

a)

True

b)

False

12.
Balance this equation:
MgCl2 --> Mg4+ Cl2
a)
It's already balanced.
b)
4MgCl2 --> Mg4+ 4Cl2
c)
4MgCl2 --> Mg4+ 5Cl2
13.
Balance this equation:
 2Li + Cl2 -> LiCl
a)
2Li + Cl2 -> 4LiCl2
b)
2Li + Cl2 -> LiCl2
c)
2Li + Cl2 -> 2LiCl
14.
The substances listed on the left side of a chemical equation are the
a)
Products
b)
Coefficients
c)
Precipitates
d)
Reactants
15.
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.
16.

Which number should go in the blank?

___ H2 + O2 -> 2 H2O

a)

1

b)

2

c)

3

d)

0

17.
Is the following equation balanced or unbalanced ? 
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
18.

What number should go in the blank?

N2 +3 H2 --> ___NH3

a)

2

b)

1

c)

3

d)

4

19.
How many hydrogens are in 4H2O?
a)
6
b)
8
c)
2
d)
4
20.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
21.

What number should go on the line?

3 NaBr + H3PO4 --> _____HBr + Na3PO4

a)

4

b)

1

c)

2

d)

3

22.

How many atoms of Hydrogen are in H2O

a)

1

b)

2

c)

3

d)

more than 3

23.

How many different elements are present in H2COCH2

a)

5

b)

4

c)

3

d)

2

24.

Calculate the number of Oxygen atoms in Al(OH)3

a)

1

b)

2

c)

3

d)

4

25.

How many iron atoms are on each side of this balanced equation?

a)

1

b)

2

c)

3

d)

4

26.

Coefficients in chemical formulas...

a)

Multiply just the first atom

b)

Add to the subscripts at the end of the molecule

c)

Multiply elements without subscripts

d)

Multiply EVERYTHING in the formula

27.

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

28.

C3H5(NO3)3

a)

C = 3, H = 5, N = 3, O = 9

b)

C = 3, H = 5, N = 1, O = 9

c)

C = 9, H = 15, N = 3, O = 9

d)

C = 9, H = 15, N = 1, O = 3

29.

H2SO4

a)

H = 2, S = 4, O = 4

b)

H = 2, S = 1, O = 4

c)

H = 8, S = 4, O = 4

d)

H = 2, SO = 4

30.

How many different elements are present in this molecule?

3 NH4C2H3O2

a)

15

b)

36

c)

5

d)

4

31.

A ______ is a number written in front of a chemical formula.

a)

Coefficient

b)

Subscript

c)

Exponent

d)

Coordinator

32.

How many oxygens are on each side of this equation?

a)

2

b)

3

c)

4

d)

6

33.

What number should go on the line?

C6H12 + _____ O2 --> 6 CO2 + 6 H2O

a)

2

b)

6

c)

9

d)

12

34.

Which equation is balanced correctly?

a)

2C2H6 + 4O2 --> 2CO2 + 6H2O

b)

C2H6 + O2 --> 2CO2 + 3H2O

c)

2C2H6 + 7 O2 --> 4CO2 + 6H2O

d)

C2H6 + 5O2 --> 4CO2 + 3H2O

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