Question

One student did an experiment with sand, gravel, food coloring and water. The steps of the experiment are shown below.

Answer 1

Answer: Movement of pollutants through the groundwater.

Explanation:

Groundwater is the water that accumulates below the surface of earth crust. This water forms the part of geosphere. The water from river, lakes, ponds and rain seep below the surface of ground through small pores present between the soil aggregates and rocks.

According to the given situation, sand and gravel forms the part of earth crust. The water here is the part of groundwater. The food coloring here is the example of pollutants which seep inside the pores present between the sand and gravel. Hence, polluting groundwater.

Answer 2

The experiments demonstrate the movement of pollutants through the ground water.

The sand and gravel make up the ground the water represents the ground water. The food coloring represents the pollutants.