The contour lines on a map show an area's

The shape of the land is called

On a topographic map, a contour line that forms a closed circuit may indicate

The cooling of hot water is one way in which

An ore is a rock that contains enough of a valuable mineral to be

Minerals are grouped according to their

Which if the following are the most common group of rock-forming minerals

All minerals are

To identify a mineral, scientist may scratch a mineral against a surface. The color of the powder left behind is the mineral's

The two major types of mineral luster are

A quartz sample breaks into many irregular pieces. This is an example of

Determining the manner in which a mineral breaks is helpful when

Earth is considered a closed system because

The type of mining used when ore is removed from an open pit is called

Earth's inner core and outer core are both

How do earth's crust and mantle differ

What are earth's layers from the center to the surface

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