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Chemistry midterm review

Total questions: 80

Worksheet time: 3600secs

Name
Class
Date
1.
Which units of measurement are used for volume?
a)
grams
b)
centimeters
c)
grams/milliliter
d)
milliliter
2.
Jack has a rock. The rock has a mass of 14g and a volume of 2cm3. What is the density of the rock?
a)
7 mL
b)
7 g/cm3
c)
28 g/cm3
d)
1/7 g/cm3
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.
Frank has an eraser. It has a mass of 4g, and a volume of 2cm3. What is its density?
a)
8 g/cm3
b)
2 g/cm3
c)
1/2 g/cm3
d)
24 g/cm3
5.
Define the term "mass".
a)
Mass/Volume
b)
Anything that has mass and takes up space 
c)
The amount of space an object occupies.
d)
The amount of matter in an object.
6.
Volume is ...
a)
Mass/Volume
b)
The amount of matter in an object.
c)
The amount of space an object occupies.
d)
Anything that has mass and occupies space.
7.
What is a compound?
a)
an atom with more electrons than protons
b)
a substance in which the atoms of two or more elements are combined together
c)
an atom with more neutrons than protons
d)
a substance in which the atoms of three or more elements are combined together
8.
Atoms combine to form _______. 
a)
electrons
b)
molecules
c)
nuclei
d)
neutrons
9.
Where are protons and neutrons located? 
a)
in the nucleus
b)
in the electron cloud
c)
in the valence shell
10.
What is the charge on a proton? 
a)
positive
b)
neutral
c)
negative
11.
What is the charge of an electron? 
a)
positive
b)
neutral
c)
negative
12.
Which part of an atom has no charge?
a)
protons
b)
neutrons
c)
electrons
d)
atoms
13.
How many neutrons does the isotope of lithium have?
a)
8
b)
3
c)
4
d)
5
14.
How many protons does this isotope of titanium have?
a)
48
b)
22
c)
26
d)
70
15.
In a ___________change, a substance changes into a different substance.
a)
Physical
b)
Chemical
16.
Is boiling water a chemical or physical change?
a)
Chemical
b)
physical
17.
a copper penny turning greenish after a few years.
a)
Chemical Change
b)
Physical Change
18.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
19.
What is a chemical change? 
a)
The atoms do nothing
b)
The material increases mass
c)
The material changes into another type of material
d)
The material changes form but stays the same molecule
20.

What is studied in Chemistry?

a)

the composition of matter and changes it undergoes

b)

all living organisms and their interaction with the environment

c)

the processes that built and continually shape and change the Earth

d)

energy, motion and how they interact

21.

What is the basic SI unit for length?

a)

foot

b)

inches

c)

meter

d)

centimeter

22.

The amount of matter an object contains is described using the SI unit of...

a)

pounds

b)

kilogram

c)

volume

d)

meter

23.

What is the BEST complete definition of Chemistry?

a)

The study of matter.

b)

The study of atoms, molecules, elements and compounds.

c)

The study of connections between the properties of matter and the atoms and molecules that make up matter.

d)

The study of chemical reactions.

24.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
25.
Which is true about the molecules at 0 K?
a)
They are moving really fast
b)
They are moving really slowly
c)
There is no motion at 0 K
d)
All of the above are true
26.
Pizza
a)
Heterogeneous
b)
Homogeneous
27.
Sugar water
a)
Heterogeneous
b)
Homogeneous
28.
Vinegar
a)
Heterogeneous
b)
Homogeneous
29.
Soup
a)
Heterogeneous
b)
Homogeneous
30.
Sublimation is a chemical change. (True or False)
a)
False
b)
True
31.
Phase change from a solid to a liquid.
a)
melting
b)
sublimation
c)
boiling
d)
condensation
32.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
33.
Something that is made up of only one kind of atom is known as _________________.
a)
a molecule
b)
a compound
c)
an element
d)
a proton
34.
The sum of the protons and neutrons in the nucleus of an atom
a)
Atomic Number
b)
Compound
c)
Electrons
d)
Mass Number (also called Atomic Mass)
35.
mixture in which the composition is not uniform throughout
a)
homogeneous mixture
b)
heterogeneous mixture
36.
Sugar water is a 
a)
solution
b)
suspension
c)
colloid
37.
Substances that are put together, but not chemically combined
a)
Mixture
b)
Pure Substance
c)
Compound
38.
The first person to ever talk about an atom was
a)
Democritus
b)
Rutherford
c)
Dalton
39.
Who stated that all atoms of the same element are excacty alike?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Borh
40.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
41.
Atom comes from the word atomos, meaning
a)
microscopic
b)
elemental
c)
indivisible
d)
molecular
42.

What did Thomson call his model of the atom?

a)

The electronegativity model

b)

The plum pudding model

c)

The Thomson model

d)

The cathode ray model

43.

Which of the following is NOT a conclusion reached in Rutherford's experiment?

a)

Atoms are mostly empty space.

b)

Atoms have a dense center with a positive charge.

c)

All atoms are identical.

d)

The area surrounding the nucleus contains the electrons.

44.
How did Rutherford discover the proton?
a)
Cathode tube ray experiment
b)
Gold Foil Experiment
c)
Planetary Model
d)
Plum Pudding Model
45.
Which of the following examples shows that a chemical reaction has occurred? 
a)
A rock breaks into smaller pieces when it is struck with a hammer.
b)
Rust forms on a hammer that has been left outside to long. 
c)
A cup of water turns pink when a few drops of red food coloring are added. 
d)
A solid is formed when heat is removed from a sample of water. 
46.
A student places a piece of a potato into a container of hydrogen peroxide. One observation the student makes is that bubbles form around the potato. The presence of bubbles might indicate the formation of a new substance because bubbles - 
a)
could show that a gas is forming
b)
always rise to the top of a liquid. 
c)
are almost always perfectly spherical.
d)
usually burst after a few minutes.
47.
Hydrogen peroxide breaks down to form water and oxygen gas. Which observation is evidence that a chemical reaction has occurred?
a)
The mass of the solution remains the same.
b)
 Phase changes are observed.
c)
 The color of the solution remains clear.
d)
The temperature of the solution increases. 
48.

The unit for volume is

a)

grams

b)

milliliters (mL)

c)

Newton

d)

cubic centimeters

49.
How many significant figures does the following number have?
0.00345
a)
6
b)
5
c)
3
d)
Ambiguous: 3,4,5, or 6
50.
How many significant figures does the following number have: 0.00204
a)
6
b)
4
c)
3
d)
2
51.

How many significant figures does the following number have?1.2500 x 10310^3  

a)
5
b)
3
c)

Ambiguous: 3 or 5

d)

7

52.
How many significant figures does the following number have: 100.00210
a)
7
b)
8
c)
10
d)
Ambiguous: 7 or 8
53.
How many significant figures: 216 m
a)
1
b)
2
c)
3
d)
0
54.

The lemonade in this glass is what type of mixture?

a)

Heterogeneous

b)

Homogeneous

55.

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

a)

Heterogeneous

b)

Homogeneous

56.

What type of mixture is shown?

a)

Homogeneous

b)

Heterogeneous

57.

Baking soda (NaHCO3)

a)

Pure substance

b)

Heterogeneous mixture

c)

Homogeneous mixture

58.
What is Kool-aid?
a)
element
b)
Heterogeneous Mixture
c)
Homogeneous Mixture
d)
Compound
59.

Which of these are homogeneous mixtures?

a)

peanuts and almonds mixed in a bowl

b)

food dye mixed in water

c)

a cup of tea and sugar

d)

concrete

60.

Which of the following are considered pure substances?

a)

homogeneous mixture

b)

compound

c)

element

d)

heterogeneous mixture

61.

Anything that has mass and takes up space

a)

matter

b)

mass

c)

liquid

d)

insulator

62.

A type of mixture that you can't see the different parts.

a)

Homogeneous mixture

b)

Heterogeneous mixture

c)

Compound

d)

distillation

63.
Melting a chocolate bar?
a)
Physical Change
b)
Chemical Change 
64.
Cutting your hair?
a)
Physical Change
b)
Chemical Change
65.
What happens when a piece of wood burns?
a)
A physical change takes place.
b)
A chemical change takes place.
c)
The wood loses its gravity.
d)
The wood loses its inertia.
66.

Your body digesting your lunch.

Chemical or Physical change?

a)

Chemical

b)

Physical

67.

Salt dissolving in water.

Chemical or Physical change?

a)

Chemical

b)

Physical

68.

Nails left ouside get rusty.

Chemical or Physical change?

a)

Chemical

b)

Physical

69.
Blue Color: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
70.
Density: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
71.
Flammability (burns): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
72.
Solubility (dissolves): Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
73.
Reacts with Acid: Chemical or Physical Property
a)
Chemical Property
b)
Physical Property
74.
Write 0.000972 in scientific notation.
a)
9.72 x 10-4
b)
9.72 x 10-3
c)
972 x 10-4
d)
9.72 x 104
75.
Write 0.037 in scientific notation.
a)
3.7 x 10-2
b)
3.7 x 102
c)
37 x 10-3
d)
37 x 103
76.
Write 2.08 x 102  in standard form.
a)
208
b)
0.0208
c)
20,800
d)
0.208
77.
How would you write 50,000 in scientific notation?
a)
50 x 105
b)
5 x 104
c)
5 x 103
d)
.5 x 103
78.
How do you write
8.317 x 106
in standard form?
a)
8, 371, 000
b)
83, 170, 000
c)
837, 100
d)
8, 317, 000
79.
Light travels at a rate of 186,000 miles per second.  Write this number in scientific notation.
a)
1.86 x 105
b)
1.86 x 104
c)
18.6 x 104
d)
186 x 103
80.
The closest galaxy to our own is over 2,500,000 light years away.  Write this number is scientific notation.
a)
2.5 x 107
b)
.25 x 107
c)
25 x 105
d)
2.5 x 106

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