1. Ozone in Earth’s atmosphere is important because it A)absorbs harmful pollution.

B)absorbs harmful radiation.

C)helps clouds form.

D)causes rain to fall.

2.

A. a
B. b
C. c
D. d

Who determined the nature of chemical bonds?

Elizabeth has two separate samples of the same substance. sample is in the liquid state, and the other is in the solid state. the two samples most likely differ in which property?

Certain types of organisms such as fireflies and anglerfish can produce light through chemical reactions in a process called bioluminescence. what kind of chemical reactions occur during bioluminescence? o a) exothermic ob) endothermic oc) recomposition od) decomposition