1. DO NOW MONDAY
1. DRAW THE FOLLOWING SCENE:
Draw three houses on the right in the middle of the page. Each house has four windows and a door. On the roof of one of the houses there are two people and a dog. Draw two trees on the left in the middle. At the top of the picture draw some clouds. The clouds look grey and it’s raining a lot. In the sky there is a helicopter. Around the houses there is water. The water touches the top windows of the houses....”
2. TELL WHAT YOU THINK IS GOING ON IN THE SCENE.

2. Classroom Expectations
ENTERING THE CLASSROOM
Enter the classroom quietly, Level 1 voice, through the door labeled ENTER
Sharpen pencil if necessary
Sit in assigned/designated seat
Begin working in your journal on the DO NOW that is posted on the board.

3. Classroom Expectations
TEACHER-LED INSTRUCTION
Look at and listen to the teacher
Take notes, if applicable
Raise your hand if you would like to contribute to the discussion or have a question

4. Classroom Expectations
GROUP/LAB WORK
Be respectful to all group/lab members
All members are expected to do their job and contribute to the activity

5. Classroom Expectations
INDEPENDENT WORK
Work diligently on assignment, Voice Level 0, unless instructed otherwise
Sharpen pencil/throw something away ONLY when given permission

6. Classroom Expectations
EXITING THE CLASSROOM
Complete and hand in the Exit Slip to the teacher (if applicable)
Clean up your assigned area before leaving the room
Leave quietly when dismissed by the teacher through the door labeled EXIT

7. TODAY’S PLAN
Compare and contrast constructive and destructive forces.
Identify and define different types of natural disasters and their causes.
TODAYS DO
Briefly discuss constructive and destructive forces.
Video about natural disasters and answer questions.

8. Constructive & Destructive Forces

9. Two Types of Forces
Destructive
Constructive

10. Destructive Forces
Destructive Forces: processes that destroy landforms.
2 types: Slow (weathering) and Fast (Erosion)
Ex. landslides, volcanic eruptions, earthquakes, floods

11. Weathering
Weathering: a slow, destructive force that breaks rocks into smaller pieces called sediments. Can by physical (mechanical) or chemical.
Keywords:
wear down, break
apart

12. Mechanical weathering: the breaking of rock into smaller pieces by forces due to gravity, ice, plant roots, or other physical forces.

13. Rock split apart by Mechanical weathering (freeze and thaw)

14. Chemical Weathering: the changing of materials in a rock by chemical processes.

15. Erosion
Erosion: the destructive movement (quick) of materials away from one place by wind, water, ice and gravity.
Wave Erosion- caused by water
Wind Erosion (Dust Storm)

16. Landslides
Landslides: occur when gravity quickly pulls rock and dirt downhill.

17. Floods
Floods: a great flow of water over an area that is usually dry land.

18. Earthquakes
Earthquakes: the shaking of Earth’s surface caused by the release of energy along a fault.
San Andreas Fault, California

19. Volcanic Eruptions
Volcano: an opening in the Earth’s crust through which steam, lava and ashes erupt.
Cause both destructive and constructive changes to landforms.

20. Mount St. Helens
Saint Helen’s Before
Saint Helen’s After

21. volcanic mountain itself
Volcanoes can be destructive, but also constructive…
Constructive:
island
Destructive:
destruction of
vegetation, the
volcanic mountain itself

22. Constructive Forces
Constructive forces: forces that build up an existing landform or create a new one.
Caused by: water, gravity, wind and glaciers.
Ex: deposition, volcanic eruptions, convergent boundaries (mountain building)

23. Deposition
Deposition: the placing of materials in a new place (constructive force).
Ex. Sandbars

24. Water Deposition
River Delta- Deposits of sediment at the mouth of the Mississippi River creating new land called a delta.

25. Wind Deposition Sand Dunes- created when sand is moved by wind
Desert Sand Dunes
Ocean Sand Dunes

26. Convergent Boundary: creates mountains

27. Natural Disasters Video