QUESTION 4
Examples of renewable resources
Sun, plants, water
Why is soil one of Earth's most valuable resources?
Because everything that lives on land, including humans depend directly or indirectly on soil
How do glaciers cause erosion
Glaciers cause erosion by crushing and scraping along the soil and rock they sit on
What is a drought?
Long periods of very little rain
Mechanical weathering and chemical weathering. Define. How are they the same? How are they different? Give an example of each.
Mechanical weathering is weathering in which rock is physically broken into smaller pieces. Chemical weathering is weathering in which rock is broken down through chemical changes. They both are the same because they both cause rock to be destroyed causing the creation of sediments. They are different because mechanical weathering does not change the type of rock or sediment that is created. While the sediments created by chemical weathering are not the same as the original rock. An example of mechanical weathering is weathering through abrasion, when one rock rubs against another rock creating smaller sediments. An example of chemical weathering is rock begin broken down by acid rain, or carbonic acid.
How can people help sand dunes maintain their size and shape without eroding?
People should not step on the sand dunes because they will break down the delicate roots of the sand grass. The sand grass collects the sand that is eroded by deflation and prevents the sand dunes from being destroyed.
What is the major agent (strongest) of erosion that has shaped Earth's land surface?
Running water
How do glaciers effect surrounding rocks
They move them far away from where they started
How do glaciers change the surface of the Earth?
They pick up sediments as they go downhill (plucking) and as those sediments rub against other sediments (abrasion) the land and bedrock can be gouged and scratched.
What is the weakest agent of erosion?
Wind is the weakest agent of erosion
When waves deposit sediments along a coast, what does it make?
a beach
List three ways that we protect our shore from erosion:
build sand dunes, build jetties/groins, beach nourishment, build seawalls, create barrier beaches
Nonrenewable resources
cannot be replaced once it is used up
When water flows down and becomes groundwater, it can dissolve rock and form caves due to ____________ weathering
chemical
Examples of nonrenewable resources
coal, gas, fossil fuels
Wind causes erosion through _________ & _________.
deflation; abrasion
The removal of rock particles by gravity, wind, water or ice is called
erosion
Water cuts through and erodes Earth's surface after it falls due to the force of __________ pulling it toward low lying oceans.
gravity
Natural resource
material found on earth that can be used by people
Methods or matter that prevents wind erosion
plant plants
Weathering
process where rock is broken into smaller pieces
Erosion
process where rock material is broken down and carried from one place to another by moving water, wind or moving ice
What feature is formed from wind erosion?
sand dunes
Weathering rate is affected by _______________ and rock type
temperature
Conservation
the act of saving, protecting or using resources wisely
Dunes reduce beach erosion because
the roots on the dune grass holds sand in place.
Recycling
to read something so it can be used again
3 ways humans can use natural resources wisely
turn off lights, plant new plants, recycle
How can we use our resources wisely
turn off lights, turn off water, turn off gas
Causes of erosion
water (rain, rivers, waves) , living things (animals) , gravity, wind and glaciers
Sediments are weathered and pushed onto the beach mostly by the action of
water erosion