The lines in an element's atomic spectrum result from electron spins going in opposite directions.

energy that is spread out among an atom's electrons.

electrons moving from a lower to a higher energy level.

electrons moving from a higher to a lower energy level.

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.