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The Water Cycle

The Water Cycle. Processes in the Water Cycle. The water cycle is made up of 5 processes Evaporation/transpiration- water vapor entering the atmosphere (from large bodies or water or plants Condensation- when air cools down, it can’t hold all the moisture so it forms liquid drops on surfaces

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The Water Cycle

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  1. The Water Cycle

  2. Processes in the Water Cycle • The water cycle is made up of 5 processes • Evaporation/transpiration- water vapor entering the atmosphere (from large bodies or water or plants • Condensation- when air cools down, it can’t hold all the moisture so it forms liquid drops on surfaces • Precipitation- when water droplets get too large and fall out of clouds back to the Earth • Runoff- water that flows back to the oceans over the land

  3. The Water Cycle

  4. Where Freshwater is Found • Atmosphere (water vapor) • Streams/rivers • Ponds/lakes • Groundwater • Glaciers and icebergs

  5. Groundwater • Makes up 25% of freshwater • Found underground • If water fills all the spaces in the rock-saturated zone • Permeable-water can pass easily through spaces in rocks • Impermeable-water cannot pass through the rocks spaces • Acquifer- a permeable layer of rock that is saturated with water

  6. Weathering and Erosion • Erosion-the process that wears down and carries away rock and soil • Weathering-process where rocks are chemically altered or physically broken down into fragments

  7. Erosion • Ways that erosion can take place • Gravity • Movement of streams • Groundwater • Glaciers • Wind • Waves Cliff eroded Glacier erosion feature

  8. Gravity’s effect Groundwater eroding land Wind erosion Waves eroding base Of cliff

  9. Types of Weathering-Mechanical • Mechanical weathering- physically breaking down rocks through • Frost wedging- ice expands and cracks rocks • Abrasion- when rocks scrape or grind against each other • Growth of plant roots- gets in between rocks and cracks them

  10. Water gets into the spaces in a rock, expands while it freezes and cuts through a rock Wind eroding a hole through a structure

  11. Types of Weathering-Chemical • Chemical weathering-chemical reactions dissolve the minerals in a rock or change them into new minerals • Water is the main agent of chemical weathering

  12. Chemical eroding of ancient buildings

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