Astudent fills a paper cup with water and puts in a freezer overnight. when she takes the cup out the next day, she notices that the sides of the cup are pushed out. why did this happen?

Because when water freezes it is less dense so it expands.

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