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