2. By Gabriel Anurum

3. Earth Earth 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

4. 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.

5. 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

6. 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

7. 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.

8. 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.

9. Trivia time! Good luck

10. #1 Where can living things be found? Air Water Soil

11. #2 Which layer in the atmosphere protects earth from the harmful rays of the sun? Stratosphere

12. #3 Which system contains all earth’s water? Hydrosphere

13. #4 What type of water do living things that live on land need ? Freshwater

14. #5 What is the brittle outer layer of the geosphere? Crust

15. #6 (critical thinking) What would happen to the biosphere if the atmosphere and hydrosphere did not exist

16. #7 What causes weather in the troposphere? The flow and swirling of gases

17. #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

18. #9 Fill in the blanks Exosphere Stratosphere Thermosphere Troposphere Mesosphere

19. #10 Fill in the graph Oxygen Nitrogen Other