Question

One student did an experiment with sand, rocks, pebbles, and water. The steps of the experiment are shown below.

Answer 1

The intended observation in this experiment is to check the flow of water through the cotton cloth when pouring the water through different material (sand, rocks and pebbles).
We will observe that the rate of water flow changes depending on which material it is flowing through.
The used materials in this experiment (sand, rocks and pebbles) are the same as those forming different layers of the earth.

Therefore, based on the above explanation, we can infer that the best answer is:
D. groundwater moves at different rates through different layers of the Earth