Share changes in landform over time
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What is physical weathering?
Rocks melting into lava
Soil being carried by wind
Rocks breaking into smaller pieces without changing material
Rocks disappearing into water
Which example shows physical weathering?
Sand blowing across a desert
A river carrying rocks downstream
Soil settling at the bottom of a river
Water freezing in rock cracks and breaking the rock apart
What happens during erosion?
Rocks melt underground
Materials like sand and soil move to a new place
Rocks break into smaller pieces
Rocks change color
Which force can cause erosion?
heat
light
wind
sound
Which example shows erosion?
Soil forming from rock
Water freezing in cracks
A rock cracking apart
Wind blowing sand across land
What happens during deposition?
Rocks turn into soil
Materials are dropped in a new location
Materials break apart
Materials move quickly
When does deposition usually happen in water?
When water speeds up
When water freezes
When water disappears
When water slows down
What is the best evidence that a flood happened?
Warm weather
Dry soil
Clear skies
Rocks and soil left on sidewalks and roads
What happens when rainfall increases?
Less erosion happens
Weathering stops
Nothing changes
More erosion and more deposition occur
What usually happens first?
Flooding
Deposition
Weathering
Erosion
Which shows the correct order of processes?
Erosion → Weathering → Deposition
Weathering → Erosion → Deposition
Erosion → Deposition → Weathering
Deposition → Weathering → Erosion
Ocean waves breaking rocks into smaller pieces is an example of:
Flooding
Deposition
Weathering
Erosion
Water gets into a small crack in a rock. Overnight the temperature drops and the water freezes. What will most likely happen to the rock?
The rock will turn into soil
the rock will melt
Nothing will happen
The rock will crack because the ice expands
A scientist pours water into a crack in a rock. The water freezes overnight. The next day the crack is larger. What caused the change?
The water evaporated
The rock moved downhill
The water expanded when it froze
The rock melted
What is sediment?
Ice inside rocks
Melted rock
Air trapped underground
Soil, sand, and small rocks that can be moved by water or wi
What force pulls water downhill and helps cause erosion?
gravity
heat
light
sound
