Section 4-7: Igneous Rocks Igneous rocks form when molten rock cools and forms crystals. Magma is rock.

What an igneous rock looks like is determined by two things.

One is the of the magma.

The other is how the magma cools.

3. Different igneous rocks contain minerals with different compositions.

Mafic igneous rocks are and in color.
I. typically contain and .

II. Low in silica

Felsic igneous rocks contain and .
I. They are high in .

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

Which of the following is not a reason why shenzhen, china, is considered an emerging global city

Which is an accurate description of the physical characteristics of poland? its fertile soil is found only along riverbanks, and its mountainous region in the northwest has few mineral resources. it is mostly flat with fertile soil except in the east and northeast, and the mountainous region in the south has large deposits of coal and copper. it is covered with thick forests, and it has large reserves of coal, petroleum, and natural gas. its landscape is dominated by plateaus, mountains, and high ridges, and it has large deposits of sulfur and copper in the northeast.