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100
What is it called when rocks are broken into smaller pieces?
weathering
100
What type of weathering occurs when water and oxygen rezct with the iron in the rocks?
chemical weathering - rust (oxidation)
100
What type of erosion changes the coastline?
Erosion by water
100
How many layers does fully developed soil contain?
4
200
What cycle does weathering play a large part in?
rock cycle
200
How does water break rocks?
by seeping into the cracks and then freezing
200
How does burning fuels create weathering?
Burning fuels creates pollution which adds to acid precipitation
200
What type of erosion causes jagged mountains and valleys?
Erosion by ice (glaciers)
200
What do you call the process of farming that removes too many minerals from the soil?
nutrient depletion
300
What blows sand across the rocks and rubs off small pieces?
Wind
300
What causes rocks to fall and break off pieces of rocks?
gravity
300
Does wathering occur faster or slower with acid precipitation?
faster
300
What helps to keep land from being eroded by wind?
plants
300
What do you call the process of fertile land being changed into barren land?
desertification
400
This type of weathering involves breaking of rocks into smaller pieces by living things and natural forces?
Mechanical
400
How do animals cause rocks to break down?
Animals move the rocks and casue them to be exposed to elements that war them down
400
What occurs when water, ice, wind, and gravity move particles of rock and soil from one place to another?
Erosion
400
Erosion by gravity is usually________________?
slow
400
Name the soil layers?
topsoil, subsoil, weathered rock fragments, soild rock
500
What type of weathering involves changing rocks minerals into new substances?
chemical
500
How do plants break down rocks?
Plants roots grow into the cracks in rocks and break them apart
500
What do rivers pick up and then deposit when it is moving?
sediment
500
Name two components of soil?
rock particles, minerals, plant remains, and animal remains
500
What does topsoil contain?
nutrients and minerals from decaying plants and animal remains
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