Unit: Weathering, Erosion, Rocks and Rock Cycle Lesson 1 Bell Ringer: Listen to the song and then explain what you remember from 6 th grade about weathering and erosion. • It’s a Hard Rock Life: Weathering and Erosion https://www.youtube.com/watch?v=qGZa1n- 9e6o&feature=player_embedded
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Unit: Weathering, Erosion, Rocks and Rock Cycle Lesson 1 ......2016/01/14 · Unit: Weathering, Erosion, Rocks and Rock Cycle Lesson 1 Bell Ringer: Listen to the song and then explain
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Unit: Weathering, Erosion,
Rocks and Rock Cycle
Lesson 1
Bell Ringer:
Listen to the song and then
explain what you remember
from 6th grade about
weathering and erosion.
• It’s a Hard Rock Life: Weathering and Erosion https://www.youtube.com/watch?v=qGZa1n-9e6o&feature=player_embedded
View BrainPop – “Erosion” and “Weathering” take notes
after each video
Notes from Brainpop: Erosion
• Weathering occurs when rocks are broken down into fragments and eventually sediments.
• Erosion occurs when fragments or sediments from rocks are moved from one place to another place by wind, rain, or running water like rivers and oceans. ▪ Erosion can create floodplains,
sandbars, river deltas and canyons and can change shapes of mountains.
River Deltas – areas where a river meets a large body of water like the ocean or a lake. Deposition of sediments occur at where the river meets the body of water.
1. Mechanical and Chemical Weathering a. Mechanical Weathering – breaks
down rocks without breaking down its chemical composition. Forces like growing plants, expanding ice, mineral crystal growth are all examples of mechanical weathering
b. Chemical Weathering – happens when water, air, and other substances react with the minerals in rocks, soil and/or building materials to change their chemical composition
• An example of chemical weathering is a cave because carbonic acid reacts with the calcite in limestone and over thousands of years can create caves.
Formative Assessment: Critical Thinking: Erosion or Weathering?
1. A man is driving by a cotton field during a very strong rainstorm. As he is driving he notices a lot of dirt draining off the field and onto the road.
What is this an example of? Why?
2. Niagara Falls is a big waterfall on the border of
Canada and the United States. Each year the edge of
the waterfall moves back a couple of centimeters
because the water is breaking apart the rocks on the
edge.
What is this an example of? Why?
3. A tree growing on a cliff is slowly growing its roots into the rocks and causing it to crack.