What is a shorter, easier way to show chemical reactions, using symbols instead of words?

a coefficient

a chemical equation

a chemical formula

a symbol

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

For 50 pointsfredrika's science teacher asked her to bring in three abiotic items from her backyard ecosystem. which of the following groups of items should she bring? a. a lightning bug, a plug of grass, and a wormb. a smooth rock, some red dirt, and an empty bird's nestc. a ladybug, a spider, and some water from a mud puddled. a caterpillar, a pine cone, and a piece of a robin's egg

Earlier studies were more slanted toward a. the upper class. c. caucasian males. b. teenagers in school. d. caucasian females. select the best answer from the choices provided a b c d