Water droplets are pulled towards earth by .

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. a car travels 6 miles north, 3 miles east, and then 2 miles south. what is the distance traveled? a.7 b.11

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt