A student wants to model the physical weathering of rock. which activity could the student perform?
The student could perform the following activity to model the physical weathering of rock:
1. Obtain a small piece of rock, preferably a sample that is prone to physical weathering (e.g., a sedimentary rock like sandstone or shale).
2. Fill a container with water and immerse the rock in it. Make sure the container is large enough to fully submerge the rock.
3. Place the container with the rock in a freezer. Leave it there for several hours, or overnight, to simulate freeze-thaw weathering.
4. Once the rock is frozen, remove the container from the freezer and allow it to thaw at room temperature. Repeat the freeze-thaw cycle several times to simulate the repeated freezing and thawing that occurs naturally in weathering.
5. Observe and record any changes or cracks that appear on the surface of the rock after each freeze-thaw cycle. These cracks are indicative of physical weathering caused by the expansion and contraction of water within the rock.
By performing this activity, the student can observe and understand how freezing and thawing can cause physical weathering of rocks in nature.
A student wants to model the physical weathering of rock. Which activity could the student perform?(1 point)
Responses
Place a paper boat in a ditch, and then use water from a hose to make it sail away.
Place a paper boat in a ditch, and then use water from a hose to make it sail away.
Place ice cream in a bowl, and then watch it melt.
Place ice cream in a bowl, and then watch it melt.
Place drops of acid on chalk, and then observe the chemical reaction.
Place drops of acid on chalk, and then observe the chemical reaction.
Place several cookies in a box, and then shake the box.
Place several cookies in a box, and then shake the box.
How can moving water contribute to physical weathering?(1 point)
Moving water can contribute to physical weathering through processes such as:
1. Abrasion: When flowing water carries sediments and rocks, these materials can act as abrasives, wearing down and physically breaking apart other rocks they come into contact with. This can occur in riverbeds, where rocks and sediment are continuously transported and collide with one another, causing them to break apart.
2. Hydraulic action: The force of moving water against rock surfaces, especially in areas with high pressure or turbulence, can cause the rock to crack, chip, or fragment. This occurs when the pressure of the water gets trapped in cracks or joints and forces them to expand.
3. Cavitation: Under certain conditions, moving water can create low-pressure areas that cause small bubbles or voids to form. These bubbles can then implode with significant force upon contact with solid surfaces, such as rocks, leading to the physical breakdown of the rock.
Overall, the constant motion and force exerted by moving water can mechanically weaken and disintegrate rocks, contributing to physical weathering.
How can moving water contribute to physical weathering?(1 point)
Responses
It can cause the formation of new minerals in rocks.
It can cause the formation of new minerals in rocks.
It can make rocks expand and contract.
It can make rocks expand and contract.
It can transport rocks to different locations.
It can transport rocks to different locations.
It can cause rocks to bump against each other.