8U4L4a Atmospheric Composition

8U4L4a Atmospheric Composition

8.MS-ESS2-5. Interpret basic weather data to identify patterns in air mass interactions and the relationship of those patterns to local weather.

Multiple Choice

What is the atmosphere?

• The air around the planet

• The water around the planet

• The soil and rocks around the planet

• The living things on the planet

Multiple Choice

What do you think composition means?

• the different parts that make up something

• the parts that compete with each other

• to mix things up

• how things are adjusted or changed

Composition means the different parts that makeup something...

Atmospheric composition means the different parts of the atmosphere!

Open Ended

What different things do you think are in the atmosphere or the air around us?

Note Page...

The Atmosphere is

the layer of gases that surround the earth.

The purpose of the atmosphere is to:

• Support life on earth by protecting it from dangerous electromagnetic radiation

• Create and controls weather and climate

• Provide gases that plants and animals need to breathe

Multiple Choice

What is NOT a purpose of the atmosphere:

• Support life on earth by protecting it from dangerous electromagnetic radiation

• Create and control weather and climate

• Provide the gases that plants and animals need to breathe

• Keep the stars and moon away from the earth

Open Ended

This is the composition of the atmosphere. Make at least one observation about this image:

Multiple Choice

An ______ is a mixture of gases that surround a planet.

• ionosphere

• ozonosphere

• atmosphere

• sea scape

The atmosphere is mostly Nitrogen and Oxygen

• Nitrogen - 78%

• Oxygen - 20.9%

The atmosphere also contains:

• 0.90% Argon

• 0.03% Carbon Dioxide (CO₂)

• 0.17% Other trace gases

• (trace means very small amount)

• These are Neon, Methane, Krypton, and Hydrogen

Multiple Select

Most of the atmosphere are these two gases

• Oxygen

• Hydrogen

• Krypton

• Methane

• Nitrogen

Gases That are Important to

Life on Earth

Nitrogen

• Removed from the atmosphere by bacteria and lightning

• N compounds used by plants in growth and development

Oxygen

• Released into the atmosphere by plants as they photosynthesize

• Used by animals to breathe

Water Vapor (H₂O)

• Amount varies in the atmosphere

• Cycles through the Hydralogic (Water) Cycle

Carbon Dioxide (CO₂)

• Removed by the atmosphere by green plants

• Breathed out by animals

Multiple Choice

Removed from the atmosphere by plants when they photosynthesize

• Nitrogen

• Oxygen

• Water Vapor

• Carbon Dioxide

Multiple Choice

Released into the atmosphere by plants when they photosynthesize

• Nitrogen

• Oxygen

• Water Vapor

• Carbon Dioxide

Multiple Choice

This gas cycles through the atmosphere by the Hydralogic Cycle

• Nitrogen

• Oxygen

• Water Vapor

• Carbon Dioxide

Multiple Choice

Gets removed from the atmosphere by lightning!

• Nitrogen

• Oxygen

• Water Vapor

• Carbon Dioxide

Atmospheric Pressure

• The pressure exerted on the earth by the atmosphere

• Decreases with increased altitude (there is less pressure the higher up you go!)

• 14.7 pounds per square inch at sea level

Atmospheric Density

• At greater altitudes, the same volume contains fewer molecules of gas.

• Measured with a barometer

Multiple Choice

This decreases the higher up you go!

• Atmospheric Pressure

• Atmospheric Density

• Both Atmospheric Pressure and Density

• Neither Atmospheric Pressure nor density

Atmosphere Part 1 Vocabulary

• altitude - the height of an object or point in relation to ground level (or sea level)

• atmosphere - the layer of gas surrounding the earth (often called air)

• atmosphere composition - the different gasses that make up the atmosphere

• exosphere - the outermost level of the atmosphere

• hydrosphere - all of the water on the earth's surface

Atmosphere Part 1 Vocabulary

• mesosphere - the middle level of the atmosphere

• lithosphere - the outer part of the earth that includes the earth's crust

• stratosphere - the level of the atmosphere above the troposphere where planes fly

• thermosphere - the last layer of atmosphere before the exosphere where the international space station is

• troposphere - the lowest level of the atmosphere where weather occurs