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7th Grade Science Common Exam
Test Description: Part II
Instructions: Answer all questions to get your test result.
1) Which layer of the atmosphere is an airplane in when it his cursing at 40,000 feet in the air
A
troposphere
B
ozonosphere
C
stratosphere
D
chemosphere
2) What weather conditions will most likely occur when there is a drop in barometric pressure?
A
calm weather
B
sunny weather
C
hot weather
D
stormy weather
3) Why does the troposphere experience the greatest amount of atmospheric pressure compared to the other layers?
A
it has the highest temperatures
B
it is the region in which weather occurs
C
it contains a high concentration of gas particles
D
it produces the ozone layer
4) The air around a high pressure area circulates
A
clockwise in the Southern Hemisphere
B
clockwise in the Northern Hemisphere
C
In either direction regardless of hemisphere
D
counterclockwise in the Northern Hemisphere
5) In which part of the atmosphere do satellites orbit making it possible for us to watch live television?
A
troposphere
B
mesosphere
C
exosphere
D
ionosphere
6) In which layer of the atmosphere does weather occur?
A
thermosphere
B
troposphere
C
stratosphere
D
mesosphere
7) Which best explains why photochemical smog is a bigger problem in large cities?
A
most large cities have airports
B
there are more motor vehicles that travel through large cities
C
the climate in large cities is constantly changing
D
people in large cities care less about the environment
8) How much of the world’s current levels of acid rain originates in human actions such as the burning of fossil fuels?
A
10 percent
B
acid rain is a purely natural phenomenon
C
more than 95 percent
D
almost half
9) The ozone layer in the stratosphere protects our planets and its inhabitants from:
A
radon
B
chlorofluorocarbons
C
ultraviolet B radiation
D
temperature inversion
10) Which of the following contribute to global warming by trapping heat near the Earth’s surface?
A
CFCs
B
greenhouse gases
C
point source pollutants
D
nonpoint source pollutants
*select an answer for all questions
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