Weathering
____ is the breaking down of rock material by physical and chemical processes
Weathering
_____ is the loose mixture of small rock fragments, organic matter, water and air.
Soil
What percent of the Earth's water is fresh water?
3%
High Ground between two watersheds
Divide
____% of US fresh water is used for crops.
40
_____ weathering is the process of rock breaking down into smaller and smaller pieces.
Physical
_____ is created when bacteria and fungi break down living matter.
Humus
The release of water into the air by plants and animals.
Transpiration
Smaller stream that feeds a river.
Tributary
_____% of US fresh water is used in our homes.
10
Occurs when water seeps into the cracks of a rock and expands when it freeze.
Ice Wedging
Soil begins with the weathering of the _____.
Parent Rock
When a solid turns directly into a gas.
Sublimation
The path a river flows in.
Channel
_____% of US fresh water is used for industry.
50
_____ is the breaking down and wearing a way of rock by mechanical weathering
Abrasion
The most nutrient rich soil horizon found ....
the top layer of soil
Gas turns into a liquid
Condensation
The area of land drained by a river system.
Watershed
Most of the drinking water comes from _____ in the US.
Groundwater
_____ occurs when other chemicals combine with oxygen in the air.
Oxidation
Describes how well the soil can support plant growth.
Fertility
The rate at which condensation = evaporation is calledq
Dew Point
Fresh water is found in these places.
Lakes, Rivers and Streams
A farming technique that saves 95% of the water typically used on a farm.
Hydroponics