What is Computer Science? Can someone please explain to me?

Can someone explain these Earth Science questions please?

• In what order do materials settle in water? Design and carry out an experiment to determine the order in which different sized materials (e.g., sand, gravel, topsoil) settle out in water after they have been mixed up. What is the effect of soil type on how fast water flows through the soil? Design and carry out an experiment to compare at least three types of soil (e.g., sand, potting soil, clay soil) to see how fast a given amount of water will drain through each one. I know I have to do an experiment on these two questions, but can someone explain them a little bit better? Thanks!

• Answer:

  basically what happens is the more dense materials will settle on the bottom first. an example is oil and water. the oil will float on water because the water is more dense than the oil. take a large plastic soda bottle with the label off so you can see whats happening and fill it half way with water. pour your larger sediments in first like your gravel and time how fast they settle from when the hit the surface of the water until they hit the bottom. then do the same with your clay soil, potting soil and sand. once you have your data you can make a graph to show your results. if you really want to play. cap off your bottle and shake the sediments up and then watch to see how they settle.