45 Questions
What percentage of the atmosphere is composed of oxygen?
20.95%
What is the primary factor affecting the distribution of gas molecules in the atmosphere?
Gravity
Which layer of the atmosphere is responsible for weather?
Troposphere
What is the approximate altitude of the troposphere?
Up to about 12 km
What is the characteristic of the temperature in the troposphere?
Decreases with altitude
How do the number of gas molecules change with an increase in altitude?
Decrease
What is the layer above the thermosphere?
Exosphere
What is the primary function of the ozone layer in the stratosphere?
To absorb and scatter ultraviolet radiation
In which layer of the atmosphere do meteors typically burn up?
Mesosphere
What is the characteristic of the temperature gradient in the stratosphere?
It increases with altitude
What is the primary feature of the exosphere?
It is a transition zone between Earth's atmosphere and outer space
What is the main reason the atmosphere is crucial for sustaining life on Earth?
It provides essential gases for respiration and photosynthesis
What is the relationship between altitude and density?
Higher altitude means lower density
In which layer of the atmosphere do space shuttles typically orbit?
Thermosphere
What is the characteristic of the temperature gradient in the mesosphere?
It decreases with altitude
What is the main feature of the thermosphere?
It is where space shuttles orbit
What is the primary function of the atmosphere?
All of the above
Which layer of the atmosphere has a temperature gradient that increases with altitude?
Stratosphere
What is the result of the ozone layer absorbing UV radiation in the stratosphere?
The temperature increases with altitude
What is the characteristic of the atmosphere in terms of altitude and density?
Higher altitude means lower density
Which of the following is NOT a characteristic of the atmosphere?
It is a solid layer
What is the primary reason the atmosphere is crucial for sustaining life?
It provides oxygen for respiration
What is the transition zone between the Earth's atmosphere and outer space?
Exosphere
What is the primary component of the atmosphere?
Nitrogen
What is the effect of gravity on the atmosphere?
It attracts gas molecules towards the Earth
What is the order of the layers of the atmosphere, from the Earth's surface to space?
Troposphere, stratosphere, mesosphere, thermosphere
What characteristic does the troposphere share with the atmosphere as a whole?
It contains the majority of the atmosphere's mass
What is a feature of the atmosphere's composition?
It is primarily composed of nitrogen
What is true about the atmosphere's layers?
Each layer has distinct characteristics
What is the result of the atmosphere's gas molecules being more concentrated near the Earth's surface?
The atmosphere becomes less dense with altitude
What is the primary reason why the atmosphere is able to maintain its composition?
The Earth's gravity
Which of the following layers of the atmosphere has the highest concentration of gas molecules?
Troposphere
What is the characteristic of the gas molecules in the atmosphere as altitude increases?
They become less concentrated
Which of the following gases is NOT a major component of the atmosphere?
Helium
What is the characteristic of the atmosphere's layers in terms of their structure?
They are distinct and concentric
What is the result of the atmosphere's gases being more concentrated near the Earth's surface?
The atmosphere is more prone to weather disturbances
What is the characteristic of the atmosphere's transition into outer space?
It is gradual and smooth
What is the primary reason for the temperature increase with altitude in the stratosphere?
Absorption of ultraviolet radiation by the ozone layer
Which of the following is a characteristic of the thermosphere?
It contains ionized gases and is where auroras occur
What is the primary factor that differentiates the exosphere from the other atmospheric layers?
Very few particles that can escape into space
What is the significance of the atmosphere's temperature maintenance function?
It traps heat and keeps the planet warm
Which of the following is a consequence of the atmosphere's density gradient?
The number of gas molecules decreases with altitude
What is the primary reason for the atmosphere's importance in sustaining life?
It provides essential gases for respiration and photosynthesis
What is the characteristic of the temperature gradient in the mesosphere?
It decreases with altitude
What is the primary function of the atmosphere's ozone layer?
It absorbs and scatters ultraviolet radiation
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