Scientists use observations and data to form and test a. theories. b. constants. c. hypotheses. d. conclusions.

Animals such as pronghorn antelope, bison ans badgers dot to the landscape. where are these animals located?

Sea stars, sea urchins, sand dollars, and brittle stars are all memeber of a group, what is the common name of the group they are all in

The “ecological footprint” left by a citizen of a developed nation is about four times larger than that left by a citizen of a developing nation. why is this the case?