What is the primary reason moist air is less dense than dry air?

Understanding Gases and Meteorology Concepts

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Physics
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9th - 12th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Moist air molecules are lighter.
Moist air is under higher pressure.
Moist air has a higher temperature.
Moist air contains more molecules.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
According to Avogadro's Law, what remains constant for gases at the same temperature and pressure?
The color of molecules
The number of molecules
The type of molecules
The weight of molecules
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In the thought experiment, what happens when heavier molecules are replaced with lighter ones in a jar?
The jar's overall weight decreases.
The jar becomes more dense.
The jar's pressure increases.
The jar's temperature rises.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molecular weight of water (H2O) compared to nitrogen (N2) and oxygen (O2)?
Equal to nitrogen
Equal to oxygen
Higher than both
Lower than both
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a dry line in meteorological terms?
A boundary between two air masses of different pressures.
A boundary between dry and moist air masses.
A boundary between two air masses of different altitudes.
A boundary between two air masses of different temperatures.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Where in the United States are dry lines most commonly found?
Southeast
Northwest
South-central
Northeast
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the effect of a dry air mass being heavier than a moist air mass?
The dry air mass stays at the same level as the moist air mass.
The dry air mass wedges under the moist air mass.
The dry air mass rises above the moist air mass.
The dry air mass evaporates the moist air mass.
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