Which type of change best describes folded mountain belts that sometimes form at plate boundaries? A. A slow small-scale change.
B. A slow large-scale change.
C. A fast large-scale change.

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.