1. What is the definition of abrasion? The wearing down of rocks by wind, water, and other rocks.

2.  When natural forces move weathered rock from one location to another

3.  The laying down of sediment in a new location.

4. As the river slows down, larger particles of rock will deposit first.

5.  It becomes smaller and smoother around the edges.

6.  After a disruption to an ecosystem, one species of plants of animals replaces another species until a climax community is reached.  2 types- primary starts with no soil: volcano eruption, landslide  Secondary starts with soil: farmland, vacant lot.

7.  The first species that grow back in primary succession because they don’t need soil. Lichen and Moss

8.  A stable community that no longer goes through major ecological change

9.  Liquid water and carbon

10.  It is built by humans and orbits another object.

11.  Not enough tech to shield our spacecraft from radiation, can’t carry enough water to drink and produce oxygen for long deep space trips.

12.  A CE is something that happens that affects a large number of people and does a great deal of damage to the environment and manmade structures  A disaster is a state of extreme ruin and misfortune

13.  By the movement of tectonic plates

14.  Magma rises through cracks or weaknesses in the Earth's crust. When this pressure is released, eg as a result of plate movement, magma explodes to the surface causing a volcanic eruption.

15.  A tsunami is a series of enormous waves created by an underwater disturbance usually associated with earthquakes occurring below or near the ocean

16.  Tiny air spaces in between particles of rock that allow water to pass through. The bigger the spaces = the more permeability

17.  Groundwater- rain that soaks into the soil, pores of rocks and cracks in the earths surface  Surface water- the water that fills lakes and rivers

18.  Watershed- an area of the land where all runoff drains to the same body of water (stream, river, ocean, etc.)  Divide- A ridge or other topographic feature that separates two adjacent drainage basins. It is an imaginary line that separates two different directions of surface water flow.  Riffle- a shallow part of a stream that flows over uneven ground- oxygenates the water

21.  Glaciers

22.  Pollution, large amounts of fertilizer, drilling for water wells

23.  Flyby, lander, orbiter  Flyby Orbiter Lander