landforms

Question 1

what is a landform?

Answer 1

A landform is a feature of the surface of the Earth

Question 2

what is a terrain?

Answer 2

The collection of landforms in an area

Question 3

what are the degrees of relief?

Answer 3

high
moderate
low

Question 4

how can slopes be described

Answer 4

high
moderate
shallow

Question 5

how are the details of a terrain shown?

Answer 5

by topographic maps

Question 6

how do landforms form?

Answer 6

Geologic processes cause portions of the land surface to move up or down relative to adjacent areas.

Question 7

what is uplift?

Answer 7

upward movement

Question 8

what is subsidence?

Answer 8

downward movement

Question 9

what is the cause for uplift and subsidence?

Answer 9

plate tectonics

Question 10

what is volcanic uplift a result of?

Answer 10

Material being added to the surface
* Hot rocks (at and below the surface) take up more space

Question 11

what is uplift at divergent boundaries a result of?

Answer 11

New material added to the surface
* Hot rocks take up more space
* Newly added material moves away from ridge, cools and contracts
Cooling = Decrease in elevation

Question 12

when does subsidence occur?

Answer 12

stretching the crust
when load is added
materials are removed from the crust

Question 13

what is load?

Answer 13

downward force

Question 14

what does lift and subsidence produce?

Answer 14

relief

Question 15

what is relief?

Answer 15

differences in elevation

Question 16

what happens when relief develops?

Answer 16

rocks arre subjected to weathering and erosion

Question 17

what happens to weathered and eroded rocks

Answer 17

they get deposited in low spots

Question 18

how are the shapes of landforms changed?

Answer 18

by weathering, erosion, deposition

Question 19

why isn’t the earth flat?

Answer 19

Ongoing uplift and subsidence continue to move rocks up and down, changing the shape of the land.

Question 20

what are tectonic landforms?

Answer 20

landforms produced from plate tectonics

Question 21

what are volcanic landforms?

Answer 21

landforms produced through volcanism

Question 22

what are erosional landforms?

Answer 22

landforms produced from erosion

Question 23

what are depositional landforms?

Answer 23

landforms produced from sediment deposition

Question 24

how are the specific landforms in an area developped?

Answer 24

eroding agent
relief
climate
substrate composition
life activity
time

Question 25

how do eroding agents develop landforms?

Answer 25

moving water, air, ice carve into the land and carry debris differently

Question 26

how does relief develop landforms?

Answer 26

The height and steepness of slopes determines whether rocks or soil will stay in
place or tumble downslope, and how fast. (Controls velocity of water and ice.)

Question 27

how does climate develop landforms?

Answer 27

limate factors (wind, rain, snow, temperature, etc.) determine whether flowing
ice, wind or water is the main agent of erosion and deposition.
affects the rate of weathering.

Question 28

how does substrate composition develop landforms?

Answer 28

Some earth materials are more
resistant to erosion than others and
can form steep cliffs.
Weak materials
collapse and form gentle slopes.

Question 29

how does life activity develop landforms?

Answer 29

Some organisms weaken earth materials by burrowing through or digesting them; others help bind loose materials together (tree roots).
-The landforms that form in an area may be influenced by biological activity.

Question 30

how does time develop landforms?

Answer 30

Landscapes evolve over time in response to continued erosion or deposition.