Landforms, natural features on Earth’s surface can change due to wind, water, and ice. Wind, water, and ice are agents of change.
Wind
Wind changes Earth’s surface. Wind can weather rock, erode sediments, and deposit sediments in a new place. Wind forms sand dunes and desert rock formations.
Sand dunes are formed when wind erodes sand particles and deposits them to form a hill of sand. This usually occurs on beaches and in deserts.
When fierce winds and rain hit rock formations like mesas and aeolian arches in a desert over time, the rock weathers and sediments erode away.
Water
Waves and moving water in rivers cause weathering, erosion, and deposition. Moving water forms canyons, deltas, sea arches, and cliffs.
A canyon forms over millions of years as a river weathers sediments from the rocks on its side.
Rivers often deposit sediments at the mouth (end) of the river. Deltas, triangular-shaped collections of sediments are formed at the mouth of a river due to deposition.
Ice
Glaciers slowly change Earth’s surface. Glaciers are huge rivers of ice that usually move only a few inches each year. Glaciers form wide valleys and moraines.
Glaciers create wide, U-shaped valleys as they slowly scrape sediments in between mountains.
When glaciers deposit sediments and rocks in a new place, they form moraines. Moraines are piles of soil and rock left behind by glaciers.
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VIDEO: WEATHERING & EROSION
Watch the video from the link above. Then answer the questions.
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What are three agents of change responsible for changing landforms?
Glaciers
Sand dunes
Ice
Water
Wind
According to the text, what are 3 landforms created by wind?
aeolian arches
deltas
U-shaped valleys
mesas
Moraines
canyons
Sand dunes
According to the text, what 2 landforms are created by glaciers?
Moraines
canyons
U-shaped valleys
Sand dunes
aeolian arches
mesas
deltas
According to the text, what landform is formed by deposition at the mouth of a river?
deltas
aeolian arches
Sand dunes
mesas
U-shaped valleys
Moraines
canyons
U-shaped valleys and canyons are both formed by weathering and erosion.
What are other landforms that is created due to weathering and erosion?
Sand dunes
U-shaped valleys
aeolian arches
cliffs
mesas
deltas
Moraines
canyons
What change to Earth’s surface is represented by the superhero, Breaker?
Erosion
Deposition
Climate
Weathering
What change to Earth’s surface is represented by the superhero, Whoosh?
Weathering
Erosion
Deposition
Volcanos
What process breaks down rock into sediment?
Weathering
Erosion
Deposition
Volcanoes
What process moves sediment to a new place?
Weathering
Erosion
Deposition
Volcanoes
What are the 3 causes of physical weathering listed in the video?
Temperature
Water
Time
Wind
What process drops sediments and rocks in a new place?
