Big Ideas
When moving water leaves soil behind, it is called________.
deposition
Hera is walking along and notices that these rocks are very smooth and polished. What most likely happened to the rocks?
(display picture)
They were worn down by a flowing river.
Look at the photo of the river. How was the circled area of the river formed?
(picture)
It was formed by deposition by the river.
Weathering is the natural process of
breaking down rock
Hurricanes are powerful storms that can cause Earth's surface to change. This tree's roots pulled up soil when Hurricane Irma struck the Florida coast in 2017. What most likely caused the tree to pull up the soil?
(show picture)
Strong wind gusts caused the tree to pull up the soil
Scientists measured an increase in rainfall in one year. What was the most likely effect on the circled area?
(picture)
More sediment entered the river.
An example of erosion is...
-tree roots split apart a rock
-soil builds up at the mouth of a river
-water carries soil from a garden to a sidewalk
-moving water makes river rocks smooth
water carries soil from a garden to a sidewalk.
Salia walks along the beach and sees some rocks offshore. She observes a large rock formation and some smaller rocks offshore. She looks for evidence that the circled rock was weathered from the larger rock formation by wave action. How can she find evidence?
(picture)
compare the material that makes up the rocks.
The region where the river is located is currently experiencing a serious drought. Scientists want to communicate to people who live near the river to let them know what effects they should expect. What can most likely be the effect of the drought?
(picture)
The amount of deposition will decrease.
How can tree roots slow down weathering, erosion, and deposition?
Tree roots can hold soil in place near a river.
A scientist is studying a rock that he found about a kilometer away from the beach. He sees there is a seashell caught in the rock. What most likely caused the seashell to become stuck in this rock?
(picture)
The seashell was deposited into the rock by water erosion.
Define deposition, erosion, weathering
erosion: sediment being carried and transported
weathering: wind, water, living things wearing down sediment
Which is an example of how wind changes Earth's surface in the desert?
-sand ripples in the desert
-desert plants clustered together
-a pond forming after a storm
-fog forming in the desert
sand ripples in the desert
Observe the structure of the mangrove trees. Their roots grow above the water. Their roots also form a very strong arrangement. How will they likely change the environment as they grow?
(picture)
The will provide a place for soil to deposit and build up.
BONUS:
Draw a rock being weathered, eroded, and deposited.
Draw sand going through the same processes.
Draw a tree going through these same processes.
answers will vary.
Write a caption to explain which rock weathered faster. Make a claim to explain the evidence that the scientist has recorded. Explain!!
(display chart)
answers will vary.