Hannah’s job involves researching the complex interactions that occur between living organisms and Earth’s nonliving systems. Which discipline of Earth and space science does Hannah work in?

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.

Arow of elements on the periodic table is called an

Which statements explain how ponds and lakes differ? check all that ponds are shallower than lakes. ponds are larger than lakes. pond water moves more than lake water. lakes have more plants at the bottom than ponds. lakes are colder and darker at the bottom than ponds.