What does a sand shark look like?

They are found in shallow waters, usually near the bottom or along tropical and temperate coastlines of all oceans. They range from 3 to 6 meters in length and are brown or gray above, paler below. Voracious, but generally sluggish, they have long, slim, pointed teeth and prey on fishes and invertebrates.

Explanation:

measuring light intensity

light meters can be used to measure light intensity. the meter is held at the soil surface and pointed in the direction of the maximum light intensity, and then the meter is read.

errors can be made when measuring light intensity by accidentally shading the light meter. the reliability of the results can be checked by taking many samples.