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MIDTERM Review - Semester 1 - Physical Science - Part 1
Test Description: MIDTERM Review
Instructions: Answer all questions to get your test result.
1) What is an atom?
A
Narrow bands of high-speed winds that circle the earth, blowing from west to east
B
two or more atoms linked together to make a substance with unique properties
C
the smallest chemical unit of matter
D
The number of molecules of a substance in a mixture for every 1 million molecules in that mixture.
2) What is a molecule?
A
the smallest chemical unit of matter
B
The moisture content of air
C
Energy that is transferred as a consequence of temperature differences.
D
two or more atoms linked together to make a substance with unique properties
3) What is concentration?
A
The lower layer of the atmosphere, where the concentration of the air is the same as the air at sea-level
B
A measure of the energy of random motion in a substance’s molecule.
C
The quantity of a substance within a certain volume.
D
The number of molecules of a substance in a mixture for every 1 million molecules in that mixture.
4) What is humidity?
A
An instrument used to measure atmospheric pressure
B
The process by which certain gases trap heat that radiates from the earth.
C
The moisture content of air
D
Energy that is transferred as a consequence of temperature differences
5) What is greenhouse effect?
A
The lower layer of the atmosphere, where the concentration of the air is the same as the air at sea-level
B
The process by which certain gases trap heat that radiates from the earth.
C
Energy that is transferred as a consequence of temperature differences.
D
An instrument used to measure atmospheric pressure
6) What is Part Per Million?
A
The number of molecules of a substance in a mixture for every 1 million molecules in that mixture.
B
the smallest chemical unit of matter
C
The quantity of a substance within a certain volume.
D
two or more atoms linked together to make a substance with unique properties
7) What are Jet Streams?
A
Energy that is transferred as a consequence of temperature differences. _____ 3. Concentration C. A measure of the energy of
B
the smallest chemical unit of matter
C
The upper level of the atmosphere where the concentration of the air is very different from the air at sea-level
D
Narrow bands of high-speed winds that circle the earth, blowing from west to east
8) What is heat?
A
Energy that is transferred as a consequence of temperature differences.
B
A measure of the energy of random motion in a substance’s molecule.
C
The moisture content of air
D
An instrument used to measure atmospheric pressure
9) What is a barometer?
A
An instrument used to measure atmospheric pressure
B
An instrument used to measure volume
C
A measure of the energy of random motion in a substance’s molecule.
D
An instrument used to measure temperature
10) What is the homosphere?
A
The lower layer of the atmosphere, where the concentration of the air is the same as the air at sea-level
B
The upper level of the atmosphere where the concentration of the air is very different from the air at sea-level
11) What is the heterosphere?
A
The lower layer of the atmosphere, where the concentration of the air is the same as the air at sea-level
B
The upper level of the atmosphere where the concentration of the air is very different from the air at sea-level
12) What is temperature?
A
Energy that is transferred as a consequence of temperature differences.
B
The quantity of a substance within a certain volume.
C
The moisture content of air
D
A measure of the energy of random motion in a substance’s molecule.
13) What would measure an objects volume?
A
meter
B
slug
C
liter
D
gram
14) If an object has a mass of 75 g, what is its mass in kg?
A
0.075
B
0.75
C
750
D
75,000
15) How many centimeters are in 1.6 meters?
A
.16
B
160
C
1.6
D
1600
16) A metal plaque turns blue/green. What is the plaque made of?
A
silver
B
gold
C
copper
D
platinum
17) Two different cleaning products have exactly the same active ingredient. One is “industrial strength” and cleans much more effectively than the other, which is “regular strength”. If they each have the same active ingredient, what is the difference?
A
the regular strength is more concentrated
B
the industrial strength is more concentrated
C
There is more of one than the other
18) Why is the greenhouse effect important?
A
We would freeze without it
B
It would be too hot to survive without it
19) Will water evaporate in 100% humidity?
A
Yes
B
No
20) Is the air cleaner today or was it cleaner 30 years ago?
A
30 years ago
B
Today
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