revision 2 - the earth

Question 1

what are the earth’s 4 spheres

Answer 1

hydrosphere
atmosphere
biosphere
geosphere

Question 2

what does the biosphere contain

Answer 2

plants, animals, ecosystems and microorganisms
helps maintain balance of the earth’s system

Question 3

what does the lithosphere contain

Answer 3

rocky outer surface of the crust
upper portion of the mantle
has life here

Question 4

what does the hydrosphere contain

Answer 4

lakes, rivers, ocean, water vapour, underground water
total amount of water on the earth

Question 5

what does the atmosphere contain

Answer 5

mixture of gases and vapours
makes the earth habitable
forms a bubble around the earth

Question 6

what are the atmospheric layers

Answer 6

troposphere, stratosphere, mesosphere, thermosphere, exosphere

Question 7

what is the troposphere

Answer 7

8-15km above sea level
contains weather and clouds

Question 8

what is the stratosphere

Answer 8

15-50km
ozone layer
absorbs UV light

Question 9

what is the mesosphere

Answer 9

50-85km
meteors burn up

Question 10

what is the thermosphere

Answer 10

85-600km
high temperatures from absorbing solar radiation

Question 11

what is the exosphere

Answer 11

600km-space
transitions into vacuum of space
sparse molecules + particles