1. Weathering, Erosion, and Deposition in Texas lesson 2
unit 4
TEKS 8B: The student will analyze the effects of weathering, erosion, and deposition on the environment in ecoregions of Texas.

2. Vocabulary
1) Environment: the area in which something exists or lives.
Polar Bear
Bactrian Camel
Cold
Hot
contrast
Ecoregion: Ice
Ecoregion: Dessert

3.
Vocabulary
2) Ecoregion: an area of land with identifiable climate patterns,
vegetation, physical features, and other factors that affect the
environment and habitat diversity.
Edwards Plateau
Blackland Prairie

4. 3) Weathering: is the breaking down of rock into smaller
pieces that remain next to each other. Weathering forms sediment. There are two types: chemical and mechanical.
Mechanical weathering: is the physical breaking of rock without any change in the
chemical composition of the rock. Examples are ice wedging, exfoliation, thermal, and biotic force.
Chemical weathering: is the breaking down of rock into smaller pieces because
of chemical changes within the rock. Examples are oxidation and carbonation.

5. 4) Erosion: is the movement of sediments from one place to another
4) Erosion: is the movement of sediments from one place to another. Causes are wind, water, wave, glacial, and gravitational. Uplifting
5) Deposition: is the laying down of sediment that was carried in from another place. Causes are wind, water, and ice. Unloading
Videos
w.e.d.
song
Bill nye, erosion
Understand -
6) Processes: Weathering, Erosion and Deposition are each a process that reshapes our environment.

6. Looking at a Texas Map, what IS our ecoregion for Comfort??
Explore your handout:
keep in your binder.
Use hand lens and locate the county of Kendall.
Looking at a Texas Map, what IS our ecoregion for Comfort??
Now, each group find one city and locate it on your map for an ecoregion (x2). Place a piece of clay on the point. Then, using the Ipad, research a description of each ecoregion. Write on your copy of your Ecoregions of Texas. (Geography, rain fall, elevation, and vegitation) tpwd or pwrpt

7. WED Activity
For the next couple of days, you will be placed in groups to explore and write on the effects of weathering, erosion, and deposition on the shape of the Earth in a 4-station activity.
SAFETY: Review station procedures and safety precautions including the safe handling of vinegar and blowing sand gently, as not to scatter it around the room and possibly get it into someone’s eyes. Remember you will also need to wear safety goggles throughout the stations.
Discuss the following clean-up procedures for each station. Include information on the disposal and cleanup of each station before rotation to a new station:
Station 1 – Rinse and dry the dish and limestone rock. Place the
used rock aside. The next group uses an unused rock.
Station 2 – Leave rock and ground sediments at the station. Each
group can add to the pile of sediment. Instruct each group to grind a
portion of the rock that hasn’t been ground together yet.

8. WED continued
Station 3 – Pile sand and gravel back to the beginning end of the
pan. Remove the large rocks so each group may place their own.
Discard straw after use.
Station 4 – Dump sand, gravel, and water into the discard container.
Do not pour down the sink because sand and gravel left behind in
the water may clog the drain.
You will have about 10–15 minutes at each station to conduct the investigation and write descriptive observations. That means; describe what happened. Make sure you label each station 1, 2, 3, or 4. Give each a Title. THEN, answer the questions (a, b, c, and d) at each station in your Notebook.
GRADED NOTEBOOK: I will be looking for organization, station numbers and a title, complete description or diagram with labels of what happened or what you did, AND that you have answered the questions for that station.
PLEASE record your information accurately in the science notebook.

9. WED station questions continued
Possible descriptive words to use:
Bubbles appeared
Vinegar acts like acid rain
Pollution
Rocks rubbed together are like being weathered
Weathered
Eroded
Deposited (dropped)
Precipitation (rain)
Physical weathering

10. In your notebook, check your definitions:
Through your exploration of weathering, erosion, and deposition, you found that water and wind contribute to the weathering of rock and the movement of water and wind cause erosion. You also found that the force of gravity and temperature play a role in reshaping the landscape around us.
In your notebook, check your definitions:
What is the difference between weathering, erosion, and Deposition?
Weathering is the breaking down of rock into smaller pieces that remain next to each other. Weathering forms sediment. There are two types: chemical and mechanical. Erosion is the movement of sediments from one place to another through the action of wind, water, ice (such as glaciers), and gravity. Deposition is the laying down of sediments that were carried in from another location.

11. Some Test Questions to Review:
1) A volcanic eruption adds, among
other things, a large amount of lava
to the environment. This balances
which of the following forces?
A gravity
B weathering
C erosion
D fossilization H
2) A student gathered four trays and four different kinds of rock samples — granite,
limestone, marble, and sandstone. She tilted the trays, put a rock sample on the top
end of each tray, and used a pump to force water continuously through a tube over
the rocks for four days (96 hours). She collected data and recorded observations of
each rock sample at the end of each day.
The results of the student’s investigation will be useful for —
F a farmer choosing between contour farming or terracing to prevent erosion
G a shorefront property owner wanting to protect his property from chemical
weathering
H a sculptor deciding which type of rock to use in a monument
J a golf course grounds keeper deciding what kind of turf to plant on the fairways
and greens B

12. 3) Which of the following events is most likely to cause an environmental
disturbance in a grassland biome?
A earthquake
B volcanic eruption
C hurricane
D fire caused by lightning H
4) In 2011, fires in Bastrop County, Texas were the most damaging wildfires in Texas history. The fire spread through the pine trees and scorched nearly 5,700 acres of
Bastrop State Park. The majority of the Houston toad’s habitat was lost, and the Lost Pines Forest was greatly affected.
As ecological succession began, which of these most likely appeared in the Bastrop forest area first?
F Shrubs and trees
G Newly developed topsoil
H Weeds and grasses
J Lichens on fallen trees D

13. Post Test Review Remember:
Notes:
How is an ecoregion different from an environment or ecosystem?
An ecoregion is an area defined by its environmental conditions, especially climate, landforms, and soil characteristics. An environment is the air, water, minerals, organisms, and all other external factors surrounding and affecting a specific organism at any time. An ecosystem is a biological environment consisting of all of the organisms living in a particular area, as well as all the nonliving, physical components (air, soil, water, and sunlight) with which the
organisms interact (food chain).
How can weathering, erosion, and deposition affect an ecoregion?
Due to differing precipitation rates, soil and rock types, wind, and weather conditions, each ecoregion can be affected by weathering, erosion, and deposition in different ways.
The End (Review W. E & D. power points)