The Four Earth SystemBy Gabriel Anurum

EarthEarth is a complex

place , usually to understand complex things people break them down to understand it. Scientist divide earth into 4 systems to help them understand the planet better

Biosphere The earth system containing

all living is the biosphere. Living things can be found in

the air, soil, and water. The biosphere has no distant

boundaries so in is found in the other Earth systems.

Atmosphere The atmosphere is a mixture of

gases the form layers around earth.

The atmosphere is more dense closer to earths surface than when away from it.

This is meant to keep in thermal energy from the sun that bounces back from earths surface.

The atmosphere is made up of a mixture of oxygen, nitrogen and other smaller amounts of gases.

water vapor, carbon dioxide, and methane

78

21

1

nitrogenoxygenother gases

Gases

Atmosphere layers

The structure of the atmosphere does not change over a period of time but the temperature does change.

Different parts of the atmosphere absorb or bounce back thermal energy from the sun.

There are 5 layers of the atmosphere Troposphere-This is the layer we live

in, gases here flow or swirl around in this layer causing weather.

Stratosphere- Unlike the troposphere the gases here do not move around, but are stable. Within the stratosphere is a layer of ozone, form of oxygen. It as like a shield that protects earths surface from the harmful rays of the sun.

Mesosphere- temperature decreases here also protects earth from meteor showers.

Thermosphere-temperature rises here Exosphere- the air molecules are

have the lowest density beyond this layer is outer space

Hydrosphere This is the system that

contains all earths water. Water is usually stored on

earths surface or below but can also be in the atmosphere and biosphere.

Scientists call natural places where water is stores reservoirs.

The largest reservoirs is the ocean 97% of earths water comes from here.

Most plants and animals that live on land, including humans can not use salt water but freshwater to survive

79% of earth’s fresh water is frozen .

The are in the form of ice found in glaciers and ice caps.

Ice, lakes, and rivers hold about 80% of earth’s fresh water.

The reaming 20% is under ground also known as ground water, water that is in the cracks and pores of beneath earths surface.

Geosphere

Also known as the solid part of earth. This system is made up of

rocks,mentals, and soil. There are 3 types of major types of rocks Igneous- a rock that is formed by the

cooling of magma. This type of rock is found mostly below earth surface.

Sedimentary- a rock that is formed by weathering or when other small particles of rocks or parts of the remains of an animal are cemented together, and are found in valleys and streams.

Metamorphic- a rock formed by extreme temperature and pressure.

Structure of Geosphere-

Crust- brittle outer layer of the geosphere. It is found under the continents and ocean crust.

Mantle-the middle and largest layer in the geosphere the rock here are denser and hotter than the ones in earths crust.

Outer and inner core- the center of the geoshphere, unlike the other parts of the geoshphere the core is not made out of rock but mental and small amounts of nickel.

Trivia time!

Good luck

#1Where can living things be

found?

Air WaterSoil

#2Which layer in the atmosphere protects

earth from the harmful rays of the sun?

Stratosphere

#3Which system contains all earth’s

water?

Hydrosphere

#4 What type of water do living things that live on land need ?

Freshwater

#5 What is the brittle outer layer of the geosphere?

Crust

#6 (critical thinking) What would happen to the biosphere if the atmosphere

and hydrosphere did not exist

#7 What causes weather in the

troposphere?

The flow and swirling of gases

#8 Why is the atmosphere more dense closer to

earths surface than when away from it.

This is meant to keep in thermal energy from the sun that bounces back from earths surface

#9Fill in the

blanks

Exosphere

Stratosphere

Thermosphere

Troposphere

Mesosphere

#10Fill in the graph

78

21

1

Gases

Oxygen

Nitrogen

Other