1. Lesson on Earth’s Landforms
Change Over Time
Lesson on Earth’s Landforms
llhammon

2. The Forces Natural Forces from inside the Earth
Process: Tectonic Activity
Natural Forces on the surface of the Earth
Process: Weathering
Process: Erosion
Process: Ice
(and gravity)
Process: Wind (deposition)
Process: Water (deposition)

3. Weathering is the chemical and physical processes that change the characteristics of rocks on the Earth’s surface. It is also known (AKA) as the preparation for erosion. In order for weathering to occur, the environment of a rock sample must change and the rock needs to be exposed to some form of water and the air. Human processes such as pollution, which can be a large factor in acid rain, along with the acts of other living organisms, can cause chemical weathering to occur at faster rates.

4. Weathering - the various mechanical and chemical processes that cause exposed rock to decompose; or the erosion or breakdown of rock into smaller fragments by natural physical agents with no chemicals involved; also called Desintigration.

5. Soil Horizons
It is C horizon (parent material and rock) where the weathering can occur.
USGS

6. In your geographic dictionary write the definition and sketch for each landform.
For the sentence section use the example provided.
The definition is in BLACK.
The cause is in RED.
The example is in YELLOW.

7. Strait – where 2 landmasses almost meet-
tectonic activity
(not Atlas!)
Strait of Gibraltar
Between the continents of Europe and Africa
Photo - NASA

8. Peninsula - a landmass surrounded by water on 3 sides– Florida at night - USA
Photo - NASA

9. Volcano-Erosion – wind – Devil’s Tower, Wyoming - USA
NGS

10. Volcanic mountain – tectonic activity – Mt. Fuji – Japan

11. Folded mountains – tectonic activity – Appalachians – East coast United States
NGS

12. Rift –a section of the Earth that has opened– tectonic activity – Great Rift Valley – Eastern coast of African continent
NGS

13. Canyon – a deep narrow depression in the Earth’s surface, aka, gorge-Erosion – water – Grand Canyon - USA
Lava fall video 3 minutes

14. NGS
Dome mountain - wind /originally tectonic activity – Uluru (Ayers Rock) Outback of Australia

15. Dome Mountain (tectonic activity) – Enchanted Rock – near Fredericksburg, Texas

16. Sand Dunes- Erosion – wind – – Sahara – North Africa
NGS

17. Large Island of Hawaii – KONA USA
Island a landmass surrounded by water on all sides– Volcanic –Tectonic Activity –
Large Island of Hawaii – KONA USA
Kilauea eruption
3 minutes
NASA

18. Glacier -body of ice that forms where the accumulation of snow exceeds its a(melting capacity) over many years– ice/gravity-Patagonia
NASA

19. Fault-where 2 tectonic plates (tectonic activity)
Andes Mountains South America
Andes
NASA

20. Butte –isolated hill with steep sides aka (mesa) Erosion – wind -
Monument Valley – Utah, USA
NGS

21. Delta – where a river empties into the ocean-Deposition – water – Mississippi River Delta – Louisiana - USA
NASA

22. NASA

23. Delta - Deposition – water – Nile River Delta – Egypt - Africa
NASA

24. River- a natural water source that flows towards the ocean - Water – Amazon River, Brazil – South America
NASA

25. Gulf -a deep inlet of the sea almost surrounded by land, with a narrow mouth. – Gulf of Mexico – Western Hemisphere
Rand McNally

26. Atafu Atoll-Tokelau Islands S. Pacific
Atoll – A ring-shaped reef, island, or chain of islands formed of coral-originally tectonic –volcanic island that sinks.
Atafu Atoll-Tokelau Islands S. Pacific
NASA
Aerial shot of the Blue hole in Belize, show only 2 minutes

27. Isthmus -a narrow strip of land with sea on either side, forming a link between two larger areas of land – Gulf of Tehuantepec - Mexico
NASA

28. Peninsula -piece of land almost surrounded by water or projecting out into a body of water.– Iberian - Europe
NASA

29. Fjord - a long, narrow, deep inlet of the sea between high cliffs- Erosion - Glacial movement (ice)-Norway fjords
NGS
Live fjord flying

30. Fault-block Mountains – Tectonic Activity Sierra Nevada - California

31. (V shaped valley ) Erosion –water- Formed by river
Cirque, Oregon

32. Chesapeake Bay – East coast United States
Bay –a broad inlet of the sea where the land curves inward
Chesapeake Bay – East coast United States
NASA

33. Glacier -Erosion – ice Tierra del Fuego, Chile
NGS

34. Glacial movement – Ice - Great Lakes - USA
NASA
Glacial movement – Ice - Great Lakes - USA

35. Plateau-An area of fairly level high ground- Erosion (wind) - Colorado Plateau - USA

36. Barrier Island -a long narrow sandy island (wider than a reef) running parallel to the shore Deposition – water- South Padre Island
NASA

37. U-shaped valley- carved by a glacial erosion,
Little Cottonwood Canyon, Wasatch Mountains, Utah.