Atmosphere Composition
This gas makes up about 78% of Earth's atmosphere and is essential for building proteins in living things.
What is Nitrogen
Name the layer of the atmosphere where we live and where most weather occurs.
Troposphere
The ozone molecule is made of how many oxygen atoms?
What is Three oxygen (O3)
On a weather map, this symbol (blue line with triangles) marks the boundary where cooler air is advancing under warmer air. What is it called?
What is Cold front
Name the instrument meteorologists use to measure air pressure.
What is a Barometer?
This gas makes up about 21% of the atmosphere and is needed for animal respiration and combustion.
What is oxygen.
Which layer is directly above the troposphere and contains the ozone layer?
Stratosphere
Where (which atmospheric layer) is the ozone layer mainly located?
What is the Stratosphere
This front forms when a warm air mass slides over a retreating cold air mass. Name it.
What is Warm front
Humidity is a measure of how much water vapor is in the air. Name one tool used to measure humidity.
What is a Hygrometer (or sling psychrometer for relative humidity)
Name two greenhouse gases that help trap heat in Earth's atmosphere.
What is Carbon dioxide, Water Vapor or methane.
In which layer would you find the International Space Station (roughly — choose the best layer)?
What is the Thermosphere.
Give one reason the ozone layer is important for life on Earth.
It absorbs most of the Sun's harmful ultraviolet (UV) radiation, protecting living things from DNA damage
Describe one typical weather change you might see when a cold front passes through (temperature, wind, precipitation — choose one).
Temperature drops and heavy rain or thunderstorms may occur as a cold front passes.
What tool measures wind speed? Give the common name.
Anemometer
The atmosphere also contains tiny solid and liquid particles like dust and pollen. What is the general term for these suspended particles?
What is Aerosols or particulates.
Give one general characteristic that changes as altitude increases (choose one: pressure, temperature trend, or density) and describe how it changes
Pressure and density decrease; temperature trend depends on layer — e.g., pressure decreases as altitude increases.
Describe in one sentence how human-made chemicals like CFCs harmed the ozone layer.
What is CFCs released into the atmosphere rose to the stratosphere, where they broke down and released chlorine atoms that destroyed ozone molecules
What does an area of low pressure usually indicate about the chance of cloudy or stormy weather? Answer in one sentence.
Low pressure usually indicates a higher chance of cloudy and stormy weather.
A rising barometer (increasing air pressure) usually signals what kind of weather is coming?
It usually signals fair, clearer, and calmer weather.
Explain why the exact percentages of atmospheric gases can vary locally (give one specific example).
What is Percentages can change near pollution sources (higher CO2 or particulates in cities) or after large volcanic eruptions (more ash and aerosols).
Compare the mesosphere and thermosphere in one clear sentence focusing on a major difference in characteristics (not exact temperatures).
The mesosphere is colder and is where meteors burn up, while the thermosphere is much hotter and has very thin air where auroras occur.
Explain the difference between "good" stratospheric ozone and "bad" ground-level ozone (one or two sentences).
Stratospheric ozone protects life by blocking UV radiation ("good" ozone). Ground-level ozone forms from pollutants and is harmful to lungs and plants ("bad" ozone).
Given a simple weather map showing a warm front approaching a region of cold air and an approaching low pressure center, predict in one sentence how weather might change in that region over the next day.
As the warm front and low pressure approach, expect increasing clouds, possible precipitation, warmer temperatures ahead of the low, and unsettled weather.
Explain how adding thermal energy to air affects its movement and pressure.
When thermal energy is added, air warms, becomes less dense, and rises; rising air lowers pressure at the surface and can lead to clouds and storms if moisture is present.