D. Underline the Modals in the sentence. 1. I can speak a little Russian.
2. You should stop smoking.
3. I may be home late.
4. I must go now
5. If I were you, I would say sorry.

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

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.