m2 POROSITY LAB

Which term is used to describe the breaking down of rock into smaller pieces - eventaully producing sediments the size of sand or silt?

Which term is a measure of how much empty space there is in a rock or soil sample?

What term is a measure of how easily a fluid can move through a rock or soil sample?

A student has 200 ml of a soil sample. He adds water until it too reaches the 200 ml mark. He notes that he was able to add 25 ml of water. What is the porosity of the sample?

• 6.25%

• 12.5%

• 25%

• 50%

A student is given a soil sample with a porosity of 30%. He places 250 ml of the sample into a beaker. How much water will he be able to add?

• 66.66 ml

• 75 ml

• 100 ml

• 125 ml

A student pours water through a sample of sand 12 cm deep. It takes 6 seconds for the water to permeate the sample. What is the rate of permeability?

• 0.5 cm/sec

• 0.5 sec/cm

• 2 sec/cm

• 2 cm/sec

Put the following rock sediments in order of size, largest (1) to smallest (5).

• silt

• clay

• gravel

• pebble

• sand