Please answer!!
Why do molecules move? Explain concentration gradient.

An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. A concentration gradient is the difference in the concentration of a substance between two areas. It occurs when the concentration of particles is higher in one area than another.

Explanation:

the most common type of reef is the fringing reef. this type of reef grows seaward directly from the shore. they form borders along the shoreline and surrounding islands.

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.