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

7. 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

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

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

10. 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

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

12. 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

13. Chemical eroding of ancient buildings