3. Use the list below to write the correct term for each definition below.
a. chemicals emitted into the atmosphere at add to the overall increase in earth's temperatures
b. when roads cross a habitat; they expose animals within the habitat to death due to encounters with vehicles
c. substances which lower the amount of life within a system
d. the knowledge and tools we use to do difficult tasks
e. a research model that studies objects similar in function or design
f. water that travels over the surface of the land during and after rain
g. a miniaturized but proportional version of an object mimic or predict the behavior of real objects or systems
h. a program that allows a computer to quickly and with detail