Chapter 13 Lesson 3: Layers of Atmosphere

Tropo means

"turning" or "changing". Conditions in the troposphere are more variable than in the other layers.

True or False: Half of the gas in the atmosphere is found in the bottom 5.5 kilometers of the Earth's atmosphere.

True

True or false: The troposphere is the shallowest layer but the most dense.

True

Why would you feel cold in the thermosphere?

Even though the air is very hot in the thermosphere, the molecules are spaced far apart in the thin air, so there are not enough to collide with us to warm us up.

True or false? We live in the lowest layer of Earth's atmosphere called the stratosphere.

FALSE: We do live in the lowest layer but it is called the troposphere.

True or False: the ionosphere contains almost all the mass of the atmosphere

FALSE: the troposphere contains almost all the mass of the atmosphere.

True or false? Scientist divide Earth's atmosphere into layers according to distance from earth?

FALSE: they classify the atmosphere according to changes in temperature.

True or False: the blanket of gases that makes up Earth's atmosphere is thick?

False: it is so thin that it would be hard to tell it apart from the vacuum of space.

True or false: the outermost layer of the Earth's atmosphere is the mesophere

False: the thermosphere is the outer most layer of the atmosphere.

Meteoroids

chunks of stone and metal from space.

Where is most of the gas in the atmosphere found?

close to the earth

layers of the thermosphere

lower layer = ionosphere begins 80 kilometers above the surface and extends to about 400 kilometers exosphere = the outer layer that extends from 400 kilometers outward for thousands of kilometers

ionosphere

lower layer of the thermosphere, begins 80 kilometers above the surface and extends to about 400 kilometers

meso means

middle, so the mesosphere is the middle layer of the atmosphere.

Ozone

protects living things from ultraviolet radiation from the sun

troposphere

the layer of the atmosphere in which earth's weather occurs

mesosphere

the layer of the atmosphere that protects earth's surface from being hit by most meteoroids

exosphere

the outer layer of the thermosphere that extends from 400 kilometers outward for thousands of kilometers

thermosphere

the outermost layer of the atmosphere that extends from 80 kilometers from earth into outer space.

stratosphere

the second layer of the atmosphere and contains the ozone layer

What are the four layers main layers of the atmosphere?

troposphere stratosphere mesosphere thermospere