2. At this very moment, although you may not see it, Earth’s land features are changing. Wind and water are working together to wear down the land in some places and build it up in other places.

3. Learn how the effects of weathering, erosion, & deposition have altered the surface of the Earth.

4. Click the picture to watch a weathering and erosion video. (20:00)

5. Before & After Picture 1.Fold your paper in half (hamburger style). 2.Choose an example from the video of weathering, erosion, and/or deposition. 3.Draw a picture on one side of the paper showing what the landform may have looked like before the change occurred, and draw a picture on the other side of the paper showing what the landform looks like after the change. 4.Write a sentence or two explaining how weathering, erosion, and/or deposition changed the landform.

6. Compare and contrast weathering and erosion.

7. Name the different ways that weathering can shape the Earth’s surface.

9. Identify the causes of weathering on the Earth’s surface.

10. Weathering

11. Earth’s land surface is made mostly of rock. Mountains and other surface features of the land are called landforms. Landforms are made of rock.

14. Rock is hard, but wind and water can slowly break rock apart. The process of breaking down rock into smaller pieces is called weathering.

15. Wind & Sand Water & Sand Rain Plants

16. Wind can carry sand and other small pieces of rock in the air as it blows. Think about sandpaper. What does it do to wood? You can smooth a piece of wood by rubbing it with sandpaper. Blowing sand acts like sandpaper on rock. It weathers the rock, which means it scrapes and wears away the surface of the rock.

18. Wind can shape rock into columns, flat tables, and arches.

19. If wind continues to blow sand across this arch, what do you think will eventually happen to it?

20. Water can also carry sand and other small pieces of rock, such as pebbles, as it flows through an area. This can weather the rock.

21. Rocks located in rivers or underwater are smoothed by currents that flow through the water running over them.

22. The flowing river carved this canyon.

23. Rainwater seeps into cracks in rock. If the temperature gets cold enough, the water freezes. When the water freezes, it expands, or takes up more space. The ice in the cracks pushes against the rock. After this continues to happen over a long period of time, the repeated freezing and thawing of the water may split the rock apart.

27. Plants also cause weathering. The roots of plants can grow into cracks in rock. As the roots become larger, they break the rock into smaller pieces.

31. Weathering does not happen quickly. Each type that we have learned about happens gradually over a long period of time. Weathering is a process that takes thousands of years.

36. Complete the weathering sorting activity.

37. Click the picture to sing a song about weathering, erosion, & deposition!

38. Earth’s surface is made mostly of ___. What is weathering? Name the 4 causes of weathering. Explain how wind and sand can cause weathering. Explain how water and sand can cause weathering. Explain how rain can cause weathering. Explain how plants can cause weathering.

39. Write a paragraph defining weathering and discussing each of its causes.

40. Describe weathering and name 4 causes of it.

42. Identify the causes of erosion on the Earth’s surface.

43. Click on the picture to watch the Weathering & Erosion Study Jam!

44. Weathering over long periods of time breaks rock into smaller and smaller pieces. Some of the pieces stay in place, but many get moved away. Erosion occurs when weathered rock is picked up and moved to a different location. Wind and moving water both cause erosion.

45. Wind Moving Water Frozen Water

46. Blowing wind picks up sand and carries it. Think about it: Have you ever been outside when the wind was blowing bits of debris like sand and dirt? Can you feel the debris hit your body and get into your eyes? Strong winds can bounce and roll larger pieces of rock along the ground.

49. Flowing rivers pick up sand and pebbles. Rivers may carry this material long distances. Ocean waves also move sand and other pieces of weathered rock.

51. Notice the bank edge of this river inlet. You can tell that the soil has been weathered and eroded away.

52. Frozen water also causes erosion. Glaciers are huge sheets of ice that move slowly over land. As they move, they pick up pieces of rock. Glacier

53. In this picture, you can see a glacier move across Antarctica's dry valleys region. It is called the dry valleys region because not much snow is found here. Earth's fifth-largest continent contains more than two-thirds of the world's freshwater in the form of ice, yet some areas receive less than two inches (five centimeters) of precipitation a year.

55. Glacial trough caused by a glacier.

56. Click the picture to sing a song about weathering, erosion, & deposition!

61. Create a weathering and erosion anchor chart.

62. Write a paragraph comparing and contrasting weathering and erosion and their causes.

63. Describe erosion and name 3 causes of it.

65. Review weathering and erosion using the anchor chart we created yesterday.

66. What does the word weathering mean? What are 4 causes of weathering? Let’s make the motion for weathering. What does the word erosion mean? What are 3 causes of erosion? Let’s make the motion for erosion.

67. The following pictures show how wind and water have changed different landscapes. The 1st picture on each slide shows the landscape before weathering and erosion. The 2 nd picture on each slide shows the landscape after weathering and erosion. What do you notice?

73. Learn about deposition and how it affects the surface of the Earth.

74. Click the picture to sing a song about weathering, erosion, & deposition!

75. Deposition is the process of dropping eroded rock in a new place. When wind and water slow down or stop, they drop the materials they are carrying. A glacier can carry pieces of rock as big as a car. When the glacier melts, it leaves the rock pieces behind. The material that is deposited is called sediment.

76. Over time, weathering, erosion, and deposition shape new landforms. Example: A river delta

77. A delta is a flat piece of land made of sand and mud that a river deposits near its mouth. The moving water in the river slows down near the place where the river flows into the ocean. As the river slows, sand and soil carried by the water settle to the bottom. This material builds up and forms a delta. A delta is usually shaped like a triangle or a fan.

78. Nile River Delta

79. Mississippi River Delta

81. This picture shows how the Louisiana coastline changed over a period of about 6,000 years. A delta was formed at the mouth of the river from weathering, erosion, and deposition.

82. What is deposition? What do we call the material that is dropped when the wind or water stops? What is a glacier? What is a river delta?

83. Write a paragraph defining weathering and discussing each of its causes.

84. Explain what deposition is and how it changes Earth’s surface.

85. Click the picture to read about Weathering, Erosion, and Deposition from the online textbook (pages 156-159 and 162-167).

86. Complete What Are Weathering and Erosion?

88. Weathering, Erosion, & Deposition Game