2.  Earth is 3 rd planet from the sun  Part of the inner planets because it is made of rock

3.  Supports life because many organisms depend on water for survival and it regulates temperature  (holds heat)

4. 1. Temperature regulation 2. Blocks harmful UV rays 3. Contains the air we breathe

5.  Organism: any living thing  Lithosphere: the layer of land that forms Earth’s surface (made of various rock types)  Hydrosphere: the parts of the Earth that are made of water  Atmosphere: the layer of gases that surrounds the Earth  Ecology: the study of interactions among living and nonliving things

6. 1. Igneous: liquid rock that has cooled ◦ Example: basalt, granite, obsidian 2. Sedimentary: rocks that have been compressed over time ◦ Example: stalagmites, limestone, sandstone, shale 3. Metamorphic: rocks formed by heat and pressure ◦ Example: marble, slate, schist

7.  Salt water = 97%  Fresh water = 3%

8.  Most living things depend on fresh water for survival  It determines how many organisms can live in one area

9.  Water in the artesian well comes from an aquifer

10. 1. Igneous Rock: rock that is formed when liquid rock solidifies and cools 2. Sedimentary Rock: rock that forms when layers of sediment compress & cement together 3. Metamorphic Rock: rock that have been transformed by heat & pressure 4. Aquifer: an underground layer of porous rock that contains water 5. Artesian well: a well in which water flows to the surface due to high pressure underground

11.  The air is thinner which means there is less oxygen to breathe

12.  Nitrogen = 78%  Oxygen = 21%  Carbon =.04%  *plants need carbon dioxide for photosynthesis in order to produce oxygen

13. 1. Troposphere: touches the Earth, weather occurs here, water vapor, most gasses 2. Stratosphere: contains the ozone layer 3. Mesosphere: coldest layer (-100 o C) 4. Thermosphere: hottest layer, very low air pressure

14. 1. Troposphere, Stratosphere, Mesosphere, and Thermosphere  see your notes! 2. Ozone: an oxygen gas containing three oxygen atoms per molecule

15.  Biosphere contains all the land, water, air, and living organisms. 1.Lithosphere = land 2.Hydrosphere = water 3.Atmosphere = air

16. 1. Lithosphere: walk, drive, ride bike 2. Hydrosphere: drink, swim, shower 3. Atmosphere: breathe, travel (plane)

17.  Organisms take what they need (food, water) from the biosphere

18. 1. Biosphere: the combined parts of the lithosphere, hydrosphere, and atmosphere in which life exists