Carl knows that water moves through different kinds of soil at different rates. How easily water moves through a soil is known as permeability. Carl decides to compare the permeabilities of different soil types. To do this, Carl takes five identical flower pots with holes in the bottom and fills each one with different soil: rocky, gravely dirt from the side of the road potting soil from the store clay soil from a nearby creek sand from a store dirt from his own backyard Carl pours one liter of water into each pot and measures how much water flows out of the bottom in one minute. Which of the following variables should be kept constant during this experiment? (1 point) Responses the amount of water that goes into each pot the amount of water that goes into each pot the permeability of the soil in each pot the permeability of the soil in each pot the amount of water that comes out of each pot the amount of water that comes out of each pot the kind of soil in each pot the kind of soil in each pot Skip to navigation

Answer 1

In this experiment, the variable that should be kept constant is the amount of water that goes into each pot. This ensures that the comparison of permeability is fair because any differences in water flow can be attributed solely to the type of soil rather than variations in the amount of water applied. The other options, such as permeability of the soil in each pot and the kind of soil, are intentionally varied for the experiment.