Why do arctic plants make the most energy storage molecules (sugar molecules) during the summer? Pls answer quick

What are the major types of a chemical compound

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Asubstance is held in an open container. its particles move past one another at random speeds but do not leave the container. heat is removed from the system, and the particles slow down. when enough heat is removed, the particles no longer have enough speed to overcome the weak attractive forces between them. when this happens, the substance enters its solid state. the process described above is known as .