1. Which is an example of physical weathering?(1 point)

Question

Responses

acid rain breaking down compounds in rock statues
acid rain breaking down compounds in rock statues

oxygen interacting with minerals in rock
oxygen interacting with minerals in rock

rock breaking apart when it falls from a cliff
rock breaking apart when it falls from a cliff

bits of iron in rock rusting when exposed to oxygen and water

2. Which is an example of chemical weathering?(1 point)
Responses

rock breaking apart during a rock slide
rock breaking apart during a rock slide

burrowing animals digging a home in rock
burrowing animals digging a home in rock

a crack in rock growing larger as water freezes in it
a crack in rock growing larger as water freezes in it

decomposition of rock when exposed to acidic plants

3. In frost wedging, a crack expands when water
. When the water
it can seep into new fissures in the rock.

4. Which of the following indicates that different rocks in the same area might weather differently? Select the two correct answers. (1 point)
Responses

rock deep in a cavern
rock deep in a cavern

cliffs with ridges
cliffs with ridges

a smooth plain
a smooth plain

rock pillars in the middle of grassy plains

5.How does time affect the physical weathering of a rock?(1 point)
Responses

Time does not affect physical weathering, only chemical weathering.
Time does not affect physical weathering, only chemical weathering.

Over time, the rock will become flat, slowing the rate of physical weathering.
Over time, the rock will become flat, slowing the rate of physical weathering.

Rock weathers the most when first exposed, then more slowly.
Rock weathers the most when first exposed, then more slowly.

The longer the rock has been exposed, the more it has weathered.

Answer 1

Here are the answers to your questions:

1. Which is an example of physical weathering?

   • rock breaking apart when it falls from a cliff

2. Which is an example of chemical weathering?

   • decomposition of rock when exposed to acidic plants

3. In frost wedging, a crack expands when water freezes. When the water thaws, it can seep into new fissures in the rock.

4. Which of the following indicates that different rocks in the same area might weather differently? Select the two correct answers.

   • cliffs with ridges
   • rock pillars in the middle of grassy plains

5. How does time affect the physical weathering of a rock?

   • Rock weathers the most when first exposed, then more slowly.

Feel free to ask if you have more questions!