Earths Spheres
What is the prefix for Earth?
geo
True or false. Can animals cause physical weathering?
True
True or false. Chemical weathering does not change the composition and appearance of rocks.
False
What is erosion?
Erosion is when sediments or other materials get moved from one place to another.
What is deposition?
Deposition is the process by which eroded material is dropped.
How many spheres are there?
5
What happens during ice wedging?
Rock cracks
What are the agents of chemical weathering?
Oxygen, air and acids.
True or false. Can erosion make streams widen or deepen?
True
What is groundwater?
Groundwater is the water located within the Earth’s surface.
True or false. The biosphere is frozen water on Earth.
False
What causes physical weathering?
Temperature, pressure, plants and animals
What is oxidation?
Oxidation is the process when chemicals mix with oxygen.
What is the most common way erosion takes place?
Flowing water.
When does deposition occur?
When gravity pulls downward on sediments and is greater than the push of flowing water or wind.
How much percent does the ocean cover?
71%
What is the breaking down and wearing away of rock by a mechanical action of other rock?
Abrasion
What are acids produced naturally by?
Certain living organisms.
What landforms can streams create?
Canyons and valleys.
What forces shape a shoreline?
Waves and currents.
What are the percentages of the gases in the atmosphere of the Earth?
78% nitrogen, 21% oxygen, 1% other gases
Does the amount of surface area exposed to the agents of physical weathering, increase or decrease?
Increase
How can you tell when a chemical reaction takes place?
When the object changes in someway. Example: rust
What four things can help erode sediments?
Water, wind, ice and gravity.
Where do streams deposit materials?
Bed, banks and mouth.