False, igneous rocks may classified by chemical composition but may not be crystallized together in the same rock. SO there are always different minerals in igneous rocks.
An increase in human population leads to environmental issues such as pollution. This is because when there is an increase in population there would be an increase food resources therefore would have more pollution as well as higher gas emissions.
Astronomical unit is that the average distance from the planet to the Sun, just about a hundred and fifty million klick. At its nighest purpose, Saturn is nine AU, then at its most distant purpose, it's 10.1 AU. Saturn's average distance from the Sun is 9.6 AU.
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Courts of law is the answer ....