How can temperature lead to weathering of rocks? (1 point)How can temperature lead to weathering of rocks? (1 point)
a. Rocks become ice when they get cold, which can later melt and wash away.
b. Rocks can melt when they become hot, which can lead to pieces breaking off.
c. Rocks expand and contract when they are heated and cooled which cause them to break.
d. Rocks move faster when they are heated, which can cause the pieces to eventually
Which part of Earth experiences physical weathering? (1 point)
a crust
b inner core
c mantle
d outer core
Which is the last stage of physical weathering in rocks? (1 point)
a boulder
b pebble
c sand
d rock
What must be present on a rock that undergoes frost wedging?(1 point)
a sharp edges
b round shape
c holes around it
d crack
1. Rocks expand and contract when they are heated and cooled which cause them to break.
2. Crust
3. Sand
4. A crack
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The answer to the first question, "How can temperature lead to weathering of rocks?" is c. Rocks expand and contract when they are heated and cooled, which causes them to break.
Explanation: Temperature changes play a significant role in the process of physical weathering. When rocks are exposed to extreme heat or cold, they expand and contract. This expansion and contraction put stress on the rocks, leading to cracks and fractures. Over time, repeated heating and cooling cycles cause the rocks to break into smaller pieces. This process is known as thermal stress weathering or exfoliation.
Moving on to the second question, "Which part of Earth experiences physical weathering?" The correct answer is a. crust.
Explanation: Physical weathering occurs at the Earth's surface, mainly in the outermost layer called the crust. This layer is composed of solid rocks that are exposed to various weathering agents like temperature changes, wind, water, ice, and biological activity.
Now onto the third question, "Which is the last stage of physical weathering in rocks?" The correct answer is d. rock.
Explanation: In the process of physical weathering, rocks gradually break down into smaller fragments due to mechanical forces. The last stage in this process is when the rock is broken into even smaller particles, which can still be recognized as rock material. Eventually, these particles may undergo further weathering and erosion to become sand, pebbles, or boulders.
Lastly, to answer the question "What must be present on a rock that undergoes frost wedging?" The correct answer is d. crack.
Explanation: Frost wedging is a type of physical weathering that occurs in cold regions where water repeatedly freezes and thaws. When water infiltrates a crack or crevice in a rock and then freezes, it expands. This expansion puts pressure on the surrounding rock and causes the crack to widen, ultimately leading to the rock's fragmentation. So, for frost wedging to occur, there must be pre-existing cracks or fractures in the rock.