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Worksheets7th Grade Science Mid-Term Review
Total questions: 51
Worksheet time: 17mins
Name
Class
Date
1.
The positive particles of an atom are
a)
electrons
b)
positrons
c)
neutrons
d)
protons
2.
Particles in an atom that are neutral and have no charge are
a)
negatrons
b)
electrons
c)
neutrons
d)
protons
3.
If an atom has 3 electrons, how many protons does it have?
a)
1
b)
2
c)
4
d)
3
4.
What is the mass number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
5.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
6.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
7.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
8.
The first energy level can hold up to how many electrons?
a)
8
b)
4
c)
2
d)
5
9.
What is the atomic mass of "F"
a)
9
b)
18
c)
17
d)
19
10.
The particles that are found in the nucleus of an atom are
a)
neutrons and electrons
b)
electrons only
c)
protons and neutrons
d)
protons and electrons
11.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
12.
What are the 3 particles that make-up the atom?
a)
protons, neutrons, and isotopes
b)
neutrons, isotopes, and electrons
c)
positives, negatives, and electrons
d)
protons, neutrons, and electrons
13.
What is the term for combining 2 or more DIFFERENT atoms together?
a)
atoms
b)
elements
c)
molecules
d)
compounds
14.
a)
2
b)
3
c)
5
15.
What element in period 2 has 7 valence electrons?
a)
Beryllium
b)
Chlorine
c)
Magnesium
d)
Fluorine
16.
On the pH scale higher numbers indicate
a)
acids
b)
bases
17.
If you have a substance with a pH of 8 it is a(n).....
a)
Acid
b)
base
18.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
19.
The pH scale is a range from:
a)
1-7
b)
1-14
c)
1-5
d)
1-20
20.
What effect does air pollution have on the water supply?
a)
A. Air pollution causes acid to accumulate in rivers and lakes.
b)
B. Air pollution is beneficial to the water supply.
c)
C. Air pollution has no impact on water supply.
d)
D. Air pollution increases the oxygen in the water supply.
21.
Under what conditions are large numbers of fish in a lake most likely to die?
a)
When a boy fishes there
b)
When there is plenty of food and shelter
c)
When the pH is unusually high or low
d)
When the pH is neutral
22.
What kind of energy is represented in the picture?
a)
Thermal
b)
Chemical
c)
Sound
d)
Nuclear
23.
A battery converts what type of energy to another?
a)
sound to kinetic
b)
light to heat
c)
mechanical to electrical
d)
chemical to electrical
24.
On a roller coaster, where is maximum potential energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
25.
On a roller coaster, where is maximum kinetic energy?
a)
At the bottom of a big hill
b)
When going around a corner
c)
When going upside down
d)
At the top of a big hill
26.
Which law states that energy can't be created or destroyed, but can be transformed or transferred?
a)
First law of motion
b)
The law of transformers
c)
Laws of Energy
d)
law of conservation of energy
27.
What kind of energy is associated with vibrations?
a)
mechanical energy
b)
electrical energy
c)
light energy
d)
sound energy
28.
How does heat always transfer?
a)
from cold to hot
b)
from hot to cold
c)
from liquid to solid
d)
from gas to liquid
29.
What type of heat transfer does this picture represent? (pot touching burner)
a)
radiation
b)
conduction
c)
convection
d)
sunshine
30.
What type of heat transfer does this picture represent?
a)
radiation
b)
conduction
c)
convection
d)
sunburns
31.
What could be added to this picture to make the light bulb work?
a)
an open switch
b)
a closed switch
c)
a rubberband
d)
a wooden sticks
32.
Which of the following energy transformations occur when a lamp that is plugged into a wall socket is functioning correctly?
a)
Chemical to light
b)
Electrical to chemical
c)
Electrical to light
d)
Chemical to electrical
33.
The diagram shows a complete circuit with a battery and a buzzer making noise. This circuit works by transforming -
a)
chemical energy to electrical to sound.
b)
electrical energy to thermal to light.
c)
sound energy to electrical to chemical.
d)
mechanical energy to electrical to sound.
34.
Warm air rises and the cool air sinks demonstrates this type of heat transfer.
a)
conduction
b)
convection
c)
radiation
d)
Insolation
35.
When the 2nd story of a house is warmer than the 1st floor of a house is heat transfer through
a)
conduction
b)
convection
c)
radiation
d)
thermal equilibrium
36.
The sun warming your skin is an example of heat transfer through
a)
conduction
b)
convection
c)
radiation
d)
thermal electricity
37.
What property of this wave is represented by the letter "A"
a)
amplitude
b)
crest
c)
trough
d)
wavelength
38.
What property of the wave is represented by the letter "B"?
a)
amplitude
b)
crest
c)
trough
d)
wavelength
39.
The number of wavelengths that pass a point each per second is:
a)
frequency
b)
period
c)
longitudinal
d)
transverse wave
40.
The type of waves that require medium to pass:
a)
Mechanical Waves
b)
Electromagnetic Waves
41.
When the frequency of a wave increases, what happens to the wavelength?
a)
The wavelength is not directly affected by the frequency of a wave.
b)
The wavelength increases.
c)
The wavelength decreases.
d)
More specific information is needed to form a conclusion about the wavelength.
42.
A mechanical wave cannot travel through...
a)
a vacuum(empty space).
b)
water.
c)
air.
d)
glass.
43.
Which wave in the diagram has the greatest frequency?
a)
1
b)
2
c)
3
d)
4
44.
Which wave in the diagram has the greatest wavelength?
a)
1
b)
2
c)
3
d)
4
45.
Which of the following can sound travel through?
a)
solid
b)
liquid
c)
gas
d)
all of the above
46.
which material does sound travel the fastest?
a)
solid
b)
liquid
c)
gases
47.
A wave carries...?
a)
energy only
b)
matter only
c)
energy and matter
d)
neither
48.
What kind of waves can travel through space?
a)
electromagnetic waves
b)
compressional waves
c)
longitudinal waves
d)
sound waves
49.
Waves can travel through empty space or they can travel through a medium. Which statement best describes a medium?
a)
The solid matter that waves travel through
b)
The gas matter that waves travel through
c)
The liquid matter that waves travel through
d)
The solid, liquid, or gas matter that waves travel through
50.
What kind of wave is pictured below?
a)
compressional wave
b)
transverse wave
c)
sound wave
d)
mechanical wave
51.
How many colors are there in visible light
a)
8
b)
6
c)
5
d)
7
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