Earth Science - 7C : Section Review Study Guide with Answers
(True or False) Some fossilized sand dunes seen in sandstone formations may have actually formed
underwater. - ansTrue
Assume that sediments collect on the deep ocean floor at a rate of 3 cm
per 1000 years. How old might the ocean floor be if sediments are 90 cm thick? Is this a reasonable answer? -
ans30,000 cm
young-earth: time too much
old-earth: time is not enough
Describe and compare mesas and buttes. - ansBoth original mountains from a dissected plateau. The difference
is the size, butte are smaller.
How are monadnocks different from most other erosional mountains? - ansFormed from magma standing out
from flat plains, lone mt
How are sediments moved about? - ansWater, wind, ice, and gravity
What is glacial till? Give two ways that glaciers can move till. - ans- is sediment left behind from a glacier, which
is made up of pebbles, gravel, sand, and fine silt
- glaciers can move till by pushing, and pulling or dragging it
What kind of depositional mountains or hills is formed by wind? - ansFormed from the wind
What process affects all rocks after they have formed? What kind of earth materials does this process create? -
ansErosion is the process that affects all rock once they are formed. Sediment is the result of erosion.
Why are volcanoes considered depositional mountains? - ansthe lava that is deposited and piles up
(True or False) Some fossilized sand dunes seen in sandstone formations may have actually formed
underwater. - ansTrue
Assume that sediments collect on the deep ocean floor at a rate of 3 cm
per 1000 years. How old might the ocean floor be if sediments are 90 cm thick? Is this a reasonable answer? -
ans30,000 cm
young-earth: time too much
old-earth: time is not enough
Describe and compare mesas and buttes. - ansBoth original mountains from a dissected plateau. The difference
is the size, butte are smaller.
How are monadnocks different from most other erosional mountains? - ansFormed from magma standing out
from flat plains, lone mt
How are sediments moved about? - ansWater, wind, ice, and gravity
What is glacial till? Give two ways that glaciers can move till. - ans- is sediment left behind from a glacier, which
is made up of pebbles, gravel, sand, and fine silt
- glaciers can move till by pushing, and pulling or dragging it
What kind of depositional mountains or hills is formed by wind? - ansFormed from the wind
What process affects all rocks after they have formed? What kind of earth materials does this process create? -
ansErosion is the process that affects all rock once they are formed. Sediment is the result of erosion.
Why are volcanoes considered depositional mountains? - ansthe lava that is deposited and piles up
