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Activity 2.1This Place Called Earth
review
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Do You Remember The 7 Activities?
1. What is Earth made of?2. How much water is there?3. What forms does water come in?4. What is the heat capacity of water?5. What is special about surface
tension?6. Where is earth in the “Big
Picture”?7. How is Earth like a space station?
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WHAT IS THE EARTH MADE OF?
Key words:•Core, mantle, crust•Lithosphere•Atmosphere•Hydrosphere•Ecosphere (biosphere)•Earthquake waves
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How Much Water Is There?
• Our Earth is 70% water, 30% land.
• Water is the most abundant compound in all living organisms!
• The “blue planet”• Water is found in lakes,
rivers, streams, soils, aquifers, glaciers, ice caps and in the atmosphere.
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What Forms Does Water Come In?
• At normal climatic temperatures, water occurs in all 3 states!
• It is the molecular speed that determines the state of matter.
• Heat is needed to change water’s physical state.
• What happens when liquid water freezes?
• Why is this important to life on Earth?
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What Is The Heat Capacity Of Water?
Heat capacity- the ability of a substance to absorb and retain heat. •Which substance took the longest to heat up? Cool down?•Why is this important for life on Earth?•Oceans moderate the Earth’s climate!!•Why do deserts have more extreme daily temperatures than places by the ocean?
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What Is Special About Surface Tension?
• Surface tension - the ability of water molecules to stick together.
• Why is surface tension important to life on Earth?
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Where Is Earth In The Big Picture?
• How is the placement of Earth within our solar system important to life?
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Why Is Earth Like A Spaceship?
Think:CyclesLaw of conservation of matter
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What Word Comes To Mind???
• Ability of water molecules to stick together• Surface tension• Ability of water to absorb and retain heat• Heat capacity• Determines the state of water• Molecular speed (heat)• Thinnest layer of our earth• Crust• Explains the parts of the Earth (core, crust,
mantle)• Earthquake waves
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• Enables water to travel through roots, and up tree trunks
• Surface tension• Where all life can be found• Biosphere• The solid portion of Earth’s crust• Lithosphere• What percent of our planet is water?• 70%• Ice is ____ dense than liquid water• less
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• Name 3 inputs for both humans and animals• Oxygen, food, water• Name 3 outputs of both humans and animals.• CO2, feces, urine, water vapor
• Name 3 outputs of plants• Water, food, oxygen, non-food plant
material
• Be able to give specific examples of how outputs/inputs are related.