Research an interaction among Earth’s systems. Make a flow chart that shows how the interaction causes feedback effects that can increase or decrease the original changes.

Which two nations are doing the most to combat their environmental issues?

Select the best hypothesis explaining why countries may have preferred communism. communism promised jobs after the insecurities of war. communists forced the people to do what they said. communism was fueled by a dislike for democracy. communism provided economic freedom for businesses and workers.

In which layer of the atmosphere are the particles so far apart that they can travel hundreds of kilometers without colliding with each other? a.exosphere b.troposphere c.mesosphere d.thermosphere