What are the two heat sources within the earth that causes plate movements ?

Put these ecosystems in order of least biodiversity to most biodiversity 1. mediterranean forest 2. indonesian rain forest 3. arctic ocean

Project: analyze it! data collected over the past century shows the earth currently in a slight warming trend, with an increase over that period of a little more than 1.0°f in average global temperature. the question of what is causing the trend has sparked controversy in both scientific and political circles. some argue that while temperature fluctuations are a normal part of the earth's climate cycles historically, an increase in co2 produced by industrial pollution and other forms of human activity is contributing to and even accelerating the increase, potentially leading to significant environmental problems. others argue that pollution-caused co2 is not a factor and that the increase is caused by natural cycles alone. objectivesresearch credible positions for and against the existence of global warming. write a short essay briefly outlining each perspective. directions locate two well-researched, credible articles, one for and one against global warming. after reading the articles, write a 300-word essay addressing the following: what is global warming, as described in the articles? what arguments are given for and against the idea. what actions are recommended by each position? in your opinion, what can be learned from the debate? what would you like to do next?

Which of the following does not determine the type of magma to erupt from a volcano? a. temperature b. gas content c. viscosity d. silica content what kind of volcano forms from basaltic magma with low-viscosity and low-gas content? a. shield volcano b. stratovolcano c. composite-cone volcano d. cinder-cone volcano what is viscosity? a. a rising mass of mantle abnormally hot and / or wet b. a pool of magma beneath the overlying crust c. what causes a bend to occur in the rock layer d. a measure of a fluid's resistance to flow