Download Activity 29 “Weathering, Erosion, and Deposition” Lab

Activity 29 “Weathering, Erosion, and Deposition” Lab
Pg.’s C-23 to C-28
Name_________________________
1.) Dynamic actions that occur both on the Earth’s surface and inside Earth are called
___________________________.
2.) Any process that breaks down earth material is called a _______________________ process.
a. An example of this is __________________________________________.
3.) Processes that __________________________ earth material are called ______________________ processes.
a. An example of this is _________________________________________________________.
4.) Destructive forces are ______________________ harmful.
5.) Constructive forces are not always _______________________.
6.) What are hoodoos? ________________________________________
a. Where can they be found? ______________________________________________
7.) What landform does a constructive force create when a river meets a lake? _______________________
The Process of Weathering:
8.) One earth process that breaks down rocks into smaller pieces is called ______________________________.
9.) Over time, rocks crack, crumble, and are broken apart by ______________________ and ________________.
10.)
Drops of water on a rock may repeatedly ___________________ and __________________, causing the
rock to crack.
11.)
Water may react with some of the ________________________ in the rock and cause part of the rock to
break down.
12.)
Rocks sometimes fall from higher places causing them to _______________ when they land.
13.)
Small ______________________ and roots of ______________________ also contribute to weathering
of rock when they burrow into the ground.
14.)
Weathering forms ____________________________ that can be moved by wind and water.
The Process of Erosion:
15.)
The movement of sediments from one place to another by water, wind or ice is called ________________.
16.)
When water erodes the earth’s surface, it cuts into the ground, forming ____________________________.
17.)
These channels can range from tiny depressions in the earth to huge canyons, such as the
__________________________________.
Slow and steady water erosion over long periods of time has created valuable features of the Earth’s
18.)
landscape such as:
a. ___________________________
b. ___________________________
c. ___________________________
d. ___________________________
e. ___________________________
19.)
Erosion can also be _____________________________.
20.)
For example, when land quickly _______________________ or __________________ near buildings or
roads.
21.)
Slower erosion can also cause damage to ________________________ and ______________________.
22.)
A hillside that erodes over many years can cause ______________________ on it to _______________
or be in danger of toppling over.
23.)
Erosion near a road can cause ______________________ and _________________________ to suddenly
______________________ on the road.
The Process of Deposition:
24.)
When erosion carries sediments from one place to another, the sediments are left or _________________
somewhere else.
25.)
This process (#24) is called ______________________________.
26.)
Deposition occurs when pieces of rock or soil settle out of _________________________ or __________
as they slow down.
27.)
Erosion __________________ the sediments that are eventually _________________________.
28.)
A ________________________ at the ____________________ of a river is an example of a landform
formed by deposition.
29.)
Sediments add important _____________________ to the ______________________.
30.)
The Mississippi and Nile River valleys have large fertile ______________________________ that are
excellent for growing crops.
31.)
These plains have been formed by the deposition of sediments that occur when the rivers _____________.
32.)
After long periods of time, deposited sediments can even form ___________________ such as
________________________.
33.)
There is a large amount of ___________________________ where the Mississippi River empties into the
__________________________________________.
34.)
Deposited sediments can be ___________________________ when they build up and _______________
rivers, lakes, wetlands, bays, and even parts of the ocean.
35.)
Sediments can cover the __________________________ areas needed by fish and other animals.
36.)
Deposition in the wrong place can make the water too _________________________ for boats and clog
the _____________________ that provide water to towns and cities.
People and Earth Processes
37.)
The processes of weathering, erosion, and deposition have been occurring for ___________________ of
years.
38.)
Many natural factors affect the __________________ of these processes.
39.)
Human activities can ________________________ these processes.
40.)
Clearing _____________________ from the land can result in erosion or deposition.
41.)
Construction or farming are the two human activities that cause the __________________ erosion.
a. These activities break apart the rocks, soil, and plant roots that __________________ the land in place.
b. This makes it easier for water or wind to erode the ________________________ land.
42.)
In time, effect of erosion can make areas less suitable for ____________________ or ________________.
43.)
Once sediments have been ___________________ as a result of human actions, they can cause serious
problems when they are ______________________________.
44.)
Many _________________, __________________, and __________________ areas have been filled in
by heavy deposition.
45.)
Sediments can cause ________________________ when they are deposited.
a. These sediment can carry ______________________ chemicals, such as pesticides used in farming or
chemicals that are already in the ________________________.
Final Questions:
46.)
Why is weathering important to the process of erosion? _______________________________________
___________________________________________________________________________________________
47.)
Whey does erosion always lead to deposition? _______________________________________________
___________________________________________________________________________________________
48.)
Prepare a concept map for weathering, erosion and deposition. (Use the blank sheets on the back) Be sure
to use the following terms:
earth processes
weathering
erosion
delta
deposition
sediments
wind
negative effects
water
ice
floodplains
construction
lakes
toxic materials
environment
farming
49.)
positive effects
Which of the three building sites- Delta Marsh, Green Hill, and Seaside Cliff would you expect:
a. Erosion to have the most effect on land? __________________________________________________
b. Deposition to have the most effect on the land. _____________________________________________