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

Question

• oxygen interacting with minerals in rock
• acid rain breaking down compounds in rock statues
• rock breaking apart when it falls from a cliff
• bits of iron in rock rusting when exposed to oxygen and water
Which is an example of chemical weathering? (1 point)
• burrowing animals digging a home in rock
• rock breaking apart during a rock slide
• a crack in rock growing larger as water freezes in it
• decomposition of rock when exposed to acidic plants
Which of the following indicates that different rocks in the same area might weather differently? Select the two correct answers. (1 point)
cliffs with ridges
• rock pillars in the middle of grassy plains
• a smooth plain
• rock deep in a cavern
How does time affect the physical weathering of a rock? (1 point)
• The longer the rock has been exposed, the more it has weathered.
• Time does not affect physical weathering, only chemical weathering.
• Rock weathers the most when first exposed, then more slowly.
• Over time, the rock will become flat, slowing the rate of physical weathering.

Answer 1

Here are the answers to your questions:

1. Example of physical weathering:

   • Rock breaking apart when it falls from a cliff.

2. Example of chemical weathering:

   • Decomposition of rock when exposed to acidic plants.

3. Indicates that different rocks in the same area might weather differently:

   • Cliffs with ridges
   • Rock pillars in the middle of grassy plains

4. How time affects the physical weathering of a rock:

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