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Weathering & Erosion
Weathering & Erosion
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Weathering and Erosion Review 8th grade Earth Science
Flashcards
39 cards
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Practice quiz
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Questions
39
Answers
1
How does the width of a river change as it erodes?
Deeper
Shallower
Narrower
Wider
2
How does the depth of a river change as it erodes away?
Deeper
Narrower
Wider
Shallower
3
What type of weathering is occurring when rocks are rained on, and dissolve?
Physical
Chemical
4
Why does the outside of a meander get eroded faster than the inside?
Water moves faster on the inside
Water moves faster on the outside
Water moves slower on the bottom
Water moves slower on the outside
5
When rock fragments freeze to the bottom of a glacier and get carried away is called
Deposition
Moraine
Plucking
Abrasion
6
What type of weathering is occurring when rocks are traveling down a river?
Physical
Chemical
7
Where does water deposit sediment faster in the curve (meander) of a river?
Top
Outside
Inside
Bottom
8
What type of weathering and erosion forms an oxbow lake?
Wind
Ice
River
Glaciers
9
A nail rusting is caused by what?
plant acid
oxidation
animal waste
acid rain
10
Geologists infer from the rounded, eroded rocks of the Rocky Mountains that:
The mountains are made from old rock
The mountains are made form young rock
The mountains have been eroding away from millions of years
The mtns formed more recently, and have not eroded much yet
11
The sediments deposited by a glacier are called what?
Moraine
Kettle
Drumlin
Till
12
What type of weathering is occurring when rocks go through a rock tumbler?
Chemical
Physical
13
Where the river ends, and lets out to the ocean is called what?
Mouth
Rapid
Delta
Source
14
What type of weathering is occurring when rocks dissolve due to plants releasing acid on them?
Physical
Chemical
15
The most important factor in determining the rate of weathering in rocks is?
How the rock was made
Where the rock was made
What the rock is made of (hardness of minerals)
What kind of weathering is taking place
16
What is a smaller river flowing into a larger river called?
Rapids
Tributary
Delta
Source
17
When a glacier carries rocks on its bottom where it gouges and scratches the rocks beneath it
Abrasion
Plucking
Moraine
Deposition
18
What is weathering?
When rocks are formed through lithification
When sediments are carried away
When rocks are melted and become magma
When rocks are broken down to sediments
19
What kind of weathering causes the mineral composition of rocks to change?
General
Chemical
Physical
Mechanical
20
What evidence do geologists look at to determine where a glacier came from?
shape and color of sediments
size and shape of sediments
size and type of sediments
color and type of sediments
21
What kind of weathering causes rocks to break down to sediments by water, wind, ice, etc.?
Chemical
Physical
Carbonic Acid
General
22
At the end of the river, sediments are deposited and create a shallow area known as a ________.
Waterfall
Mouth
Delta
Rapid
23
Geologists infer from the sharp, jagged rocks of the Himalayan Mountains that:
The mountains formed recently, and have not eroded much yet
the mountains are made of old rock
the mountains have been eroding for millions of years
The mountains are made of young rock
24
When sediments settle to the bottom of water, this process is called:
Deposition
Lithification
Erosion
Weathering
25
The rolling hills of Minnesota are made of ____________.
Mounds of grass
Mounds of till
Mounds of dirt
Mounds of fossils
26
What type of weathering is it when rocks are being pushed along the ground under a glacier?
Physical
Chemical
27
Water goes from higher elevation w/harder rock, and drops suddenly to lower elev. w/softer rock
Waterfall
Rapids
Tributary
Delta
28
Where does water pick up sediment faster in the curve (meander) of a river?
Outside
Inside
Bottom
Top
29
A ridge of till located at the farthest point reached be a glacier is called what?
terminal moraine
terminal till
terminal kettle
terminal drumline
30
In the lab we did in class, why did Halite lose more weight than the other two types of rocks?
It is a harder mineral
They were bigger rocks
They were a lightweight mineral
It is a softer mineral
31
What is Erosion?
When rocks are melted to magma
When sediments turn to rock through lithification
When sediments are carried away
When rocks are broken down to sediments
32
Which of the following is evidence that an area was once covered by a glacier?
Oxbow Lake
Tributary
U shaped Valley
V shaped Valley
33
What causes the greatest amount of erosion?
Gravity
Ice
Wind
Water
34
What physical characteristics do weathered rocks have?
They are irregular shaped
They are bigger
They are easy to break
They are smoother
35
When large boulders are in the middle of rivers causing waves, what are the waves called?
Source
Waterfall
Delta
Rapids
36
What formed the deep river valleys in Minnesota?
Glacial Lake Drainage
All of the above
Rainwater flooding the valley
Glaciers moving across Minnesota
37
What is the beginning of the river called?
Delta
Source
Mouth
Rapids
38
What is a curve or bend in the river called?
Source
Meander
Rapid
Delta
39
What is the name of the acid in acid rain that weathers rocks?
Nitric Acid
Carbonic Acid
Sulfuric Acid
All of the above
