Worksheets18A What is the Atmosphere?
Total questions: 24
Worksheet time: 48mins
Which process below absorbs carbon dioxide?
Combustion
Respiration
Photosynthesis
Decomposition
Marine life is a part of the carbon cycle because carbon compounds (a) in surface water and ground water. (Hint: Check 18.5)
What gas makes up 78% of Earth's atmosphere?
Oxygen
Nitrogen
Carbon Dioxide
Hydrogen
Oxygen makes up what percentage of Earth's atmosphere?
34%
78%
21%
45%
Most portions of gases stay constant except for which gas?
Carbon dioxide
Argon
Helium
Hydrogen
The portion of the atmosphere in which gases occur everywhere in the same proportions is the _________.
troposphere
heterosphere
homosphere
None of the above.
At what height would you need to start breathing pressurized oxygen?
10 km
7 km
5 km
3 km
The part of the atmosphere in which the proportions of the gases change with altitude is the ________.
Homosphere
Mesosphere
Heterosphere
Tetrosphere
Gases settle out by their atomic weights. Which gas is the heaviest in the list below?
oxygen
hydrogen
helium
nitrogen
Which layer of the atmosphere is closest to the surface of the earth?
troposphere
stratosphere
mesosphere
exosphere
This layer of the atmosphere is between 80 and 500 km. Within this layer there are meteors and the International Space Station.
Thermosphere
Exosphere
Mesosphere
Stratosphere
Air is mostly (a) , which serves to dilute the oxygen. (Hint: 18.3)
What is the main reason that gases within the heterosphere settle by their atomic weights?
There is little wind within the heterosphere
The gases have no place to escape
They are constantly combusting
The entire atmospheric layer is made up of gas
Which gas within the heterosphere has the highest altitude?
Molecular Hydrogen
Oxygen
Helium
Atomic Oxygen
Atmospheric scientists call the steady change in temperature within the troposphere a (a) rate. (Hint: Look in 18.4)
The upper boundary of the troposphere is call the ___________________________.
tropopause
upper ceiling
tromosophere
thermal insulation
This gas makes up more than three-fourths or 78% of the earth's atmosphere. (Hint: Look on page 431)
(a)
What is a major, life providing reason for the importance of nitrogen in the earth's atmosphere?
It helps to dilute oxygen to the concentration that is best for life
It helps to concentrate oxygen to the concentration that is best for life
It combines with other gases to cause combustion
The earth began forming more than 4.5 billion years ago.
Old-earth scientists
New-earth scientists
(a) is the basic building block for many useful chemicals, such as those found in artificial fertilizers and cleansers. (Hint: Look on page 438)
A transitional layer - not a true layer - between the atmosphere and interplanetary space.
What is the exosphere?
What is the thermosphere?
What is the mesophere?
What is the jet stream?
Use by pilots to save fuel and increase speed, this force can reach speeds as fast as 400 kph.
What is the jet stream?
What is wind velocity?
What is jet combustion?
What is the troposphere?
True or False: The troposphere, stratosphere, and mesosphere all lie within the homosphere composition layer.
True
False
Mesos means...
Middle
Beneath
Upper
Messy
