Earth’s Atmosphere and Water What is Air? __________ is the ______________________ of many ________________ that surround Earth The ________________ of air _______________________ Earth makes up Earth’s ____________________________ Air can be compressed (____________________ into a ___________________ space) Air has ____________ and takes up ___________________ Air is made of _________________________ too ______________________ to see What Gasses are in Air? Permanent Gases of the Atmosphere __________________ (N) ___________ __________________ (O) ____________ __________________ (Ar) 0.93% Neon (Ne) 0.002% Helium (He) 0.0005% Krypton (Kr) 0.0001% Hydrogen (H) 0.00005% Xenon (Xe) 0.000009% Variable Gases of the Atmosphere ________________________(H₂O) 0-4% ________________________(CO₂) 0.039% ________________________ (CH₄) 0.00017% Ozone (O₃) 0.000004%

How Deep is Earth’s Atmosphere? 560-600 Km Least Dense Most Dense 85-560 Km 50-85 Km 15-50 Km 0-20 Km

The Troposphere The layer we live in is called the troposphere The depth of the troposphere depends on the_________________________________of the air, but it is the shallowest layer Air in the troposphere is_____________________________________near the _______________________________ __________________________________ happens in the troposphere This is the layer with the ______________________ air _______________________________ and air ____________________ The Stratosphere A fast flowing stream of air, called the ______________________________ travels (west to east) ____________________ the ____________________________ and ____________________________________ The ______________________________________ has a layer of ozone (O₃) that protects us from UV radiation from the sun Air in the stratosphere is _________________________________ near the _______________ The Mesosphere The _______________________________ is ___________________________ than the Stratosphere (-90°C) This is the layer where _________________________ called _________________________ burn up while entering Earth’s atmosphere. The Thermosphere The ______________________________ has very little air The temperature in the thermosphere can ____________ dramatically, but it is considered the _________________ layer (1,500°C or higher!) The International Space Station is in the thermosphere

The Exosphere The ______________________________ is the layer that fades into space The _____________________________ in the exosphere is ______________________________ (-270°C) What is Weather? ___________________________ is the __________________________ of the ___________________ in an area Conditions can _____________________________ so they are called weather ________________________ ________________________ who study weather are called _______________________________ Meteorologists use _____________________________ to ___________________ the variables that changes in weather Tools of Meteorology * Changes in pressure mean changes in weather. Falling pressure means rain is coming. Rising pressure means dry weather is coming. Variable Tool Used Temperature Air Pressure (density) Humidity (water vapor) Wind Speed Wind Direction