WED Review

Earth’s Changing Surface

ESS 2-2

Weathering…

Definition: the break down of rock on Earth’s surface.

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Weathering…

What could cause rock to break down?

Is the weathering of rock a fast or slow
process?

Water, wind, glaciers, gravity These are called “agents” of
weathering. How could each of these agents cause
weathering?

Usually it’s a slow process.

Erosion…

Definition: the removal/movement of sediment

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Erosion…

What could cause sediment to move?

Is the erosion of sediment a fast or
slow process?

Water, wind, glaciers, gravity These are called “agents” of
erosion. How could each of these agents cause erosion?

Usually it’s a slow process.
There are some exceptions.

Deposition…

Definition: the laying down of

eroded sediment

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Deposition…

What could cause sediment to be dropped off/put down?

Is the deposition of sediment a fast or slow process?

Water, wind, glaciers, gravity These are called “agents” of
deposition. How could each of these agents cause deposition?

Usually it’s a slow process.
There are some exceptions.

Which of the following landforms are created from
weathering and erosion or from deposition?

Canyon

The river (water)
breaks down
(weathers) the rock
and then carries it
away (erosion).
(Slow Process)

Which of the following landforms are created from
weathering and erosion or from deposition?

Sand Dunes

The wind carries
(erosion) sediment
into the area and
drops it off in piles.
(Slow Process)

Which of the following landforms are created from
weathering and erosion or from deposition?

Landslide

Gravity pulls down
the rock (erosion).
(Fast Process)

Which of the following landforms are created from
weathering and erosion or from deposition?

Delta

The river (water) upstream
breaks down (weathers)
the rockand then carries it
downstream (erosion)
where it deposits the
sediment in a pile at the
mouth of the river.
(Slow Process)

Which of the following landforms are created from
weathering and erosion or from deposition?

Hoodoos

The water breaks
down (weathers) the
rockand then carries
it away (erosion).
(Slow Process)

Which of the following landforms are created from
weathering and erosion or from deposition?

Arches

The water or wind
breaks down
(weathers) the rock
and then carries it
away (erosion).
(Slow Process)

Which of the following landforms are created from
weathering and erosion or from deposition?

Valley *V-shaped

*U-shaped

The water or glacier
breaks down
(weathers) the rock
and then carries it
away (erosion).
(Slow Process)

Earth’s surface can change due to events

Landform: Crater

Agent: Asteroid

The Earth’s gravity will pull the asteroid into the Earth and
cause a crater to be created. Is this a fast or slow process?

Fast Process

Earth’s surface can change due to events

Landform: Volcanic Eruptions

Agent: Magma

The magma within the Earth builds up enough pressure to push
upward through the volcano. This adds layers of rock to the cone.
Is this a fast or slow process?

Fast Process

Spatial Scales

Each of these landforms cover different amounts of spaces.
We categorize these into “Spatial Scales”.

Examples: Microscopic Human Regional Continental

Let’s look at some examples of events and decide what
spatial scale they would form in.