According to the theory plate tectonics, the earth's crust is broken into about 12 plates that float on hotter, softer rocks in the underlying mantle. these plates move about the earth, just inches each year. these slight movements are responsible, in great part, for the earthquakes and volcanoes that happen on earth. what is the source of energy that drives this plate movement?

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)