2007-01-14 01:13:12 · 2 answers · asked by raeita_teymouri 1 in Science & Mathematics ➔ Earth Sciences & Geology
Earth's crust contains large deposits of fossil fuels: (coal, petroleum, natural gas, methane clathrate). These deposits are used by humans both for energy production and as feedstock for chemical production.
Mineral ore bodies have been formed in Earth's crust by the action of erosion and plate tectonics. These bodies form concentrated sources for many metals and other useful elements.
Earth's biosphere produces many useful biological products for humans, including (but far from limited to) food, wood, pharmaceuticals, oxygen, and the recycling of many organic wastes. The land-based ecosystem depends upon topsoil and fresh water, and the oceanic ecosystem depends upon dissolved nutrients washed down from the land.
Read more: http://en.wikipedia.org/wiki/Earth
2007-01-14 01:24:50 · answer #1 · answered by sheepishbiribiri 2 · 0⤊ 0⤋
It is basically round, its rocky and it can be studied, try a geology or physical science course.
2007-01-17 13:13:18 · answer #2 · answered by Laura Marie B 3 · 0⤊ 0⤋