Atmosphere Study Guide

Answer Key

Atmosphere is the envelope of gases that surround the planet

Weather is the condition of the Earth’s atmosphere at a particular time and place

What is the instruments that

measures air pressure?

Barometer

What is Altitude?

distance above sea level

What is the most abundant gas in the

atmosphere?

Nitrogen 78%

Which gas is the 2nd most abundant in

the Earth’s atmosphere?

Oxygen 21%

What percent of our atmosphere is

made up of nitrogen and oxygen?

78% + 21% =

99%

What percent of our atmosphere is

made up of gases other than nitrogen?

100 – 78 =

22%

What percent of our atmosphere is

made up of gases other than oxygen?

100 – 21 =

79%

What percent of our atmosphere is

made up of gases other than nitrogen

and oxygen?

78 + 21 = 99

100 – 99=

1%

What are the two most abundant

gases, and what percentage are they

in the atmosphere?

Nitrogen 78%

Oxygen 21%

Scientists use this as a way of dividing

the different layers of the atmosphere

Changes in the temperature

How is carbon dioxide produced?

Breathing

Burning Fossil Fuels Cars

Factories

The function or purpose of the ozone

layer is:

Protects earth from UV Rays

Layer of

Atmosphere

What happens How Temp.

Changes

Troposphere WeatherWe live here

Stratosphere Planes Fly HereOzone Layer

MesosphereProtects earth from meteoroids

Thermosphere Heat LayerDivided into 2

It gets hotter as you go up

It gets colder as you go up

It gets hotter as you go up

It gets colder as you go up

Layer of

Thermosphere

What happens

Ionosphere

•Has Ions•Auroras Occur Here

Exosphere

Edge of AtmosphereSatellites Fly Here

What is the relationship between air

pressure and density?

Air Pressure Increases: Density Increase,

Air pressure decreases: Density Decreases

What happens to density when you

change altitude?

High (increase) Altitude:

LOW DENSITY (Density decreases)

What happens to density when you

change altitude?

Low (Decrease) Altitude:

HIGH DENSITY (Density increases)

What happens to pressure when you

change altitude?

High (increase) Altitude:

LOW AIR PRESSURE (air pressure decreases)

What happens to pressure when you

change altitude?

Low (decrease) Altitude:

INCREASE AIR PRESSURE (GETS HIGHER)

What makes conditions right for life

on earth?

THE ATMOSPHERE

We couldn’t live without it

What are things we can do to help

improve air quality

Carpool

ride bikes

Walk

public transportation

filters on factories