unit: weathering, erosion, rocks and rock cycle lesson 1 ......2016/01/14 · unit: weathering,...
TRANSCRIPT
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
Teacher’s Answer:
• Weathering is the breaking
down of rocks into smaller
pieces, eventually becoming
sediment.
• Erosion is when rocks or
sediment get moved from
one place to another.
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.
▪ Beaches are formed from weathering and erosion.
Examples of Floodplains
Examples of Sandbars
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.
Examples of Canyon Formations
Notes from Brainpop: Weathering
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.
• Weathering, Erosion and Deposition Song
https://www.youtube.com/watch?feature=player_embedded&v=_znL9mi06wk
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.
What is this an example of? Why?
4. A glacier is a big piece of ice that slowly moves. As it moves it digs up pieces of rocks and dirt and moves them down mountains.
What is this an example of? Why?
**If your answer was weathering then explain if the
example was chemical or mechanical weathering.
Name ________ Date ______ Period ___
Lesson 1 – Exit Question
Explain the reasoning for the answer you
chose.
Homework: BRAINPOP Login:
Adamerritt, Password: Brainpop
Complete both quizzes on BrainPop “Weathering” and BrainPop “Erosion”. Questions and correct answers.