How can water be scarce when almost three-fourths of the Earth is covered by water?

A town is debating what type of power plant to build. To make the best possible decision,

Using land to grow food crops is an example of

Many uses of land, including logging, mining, and farming, expose the soil, which can lead to

The ozone layer protects people from which of the following?

What is the hardest known mineral?

Minerals can form deep inside Earth’s crust by

Although brick, steel, and glass all come from substances found in Earth’s crust, they are NOT classified as minerals because

The heat that changes a rock into metamorphic rock comes from

Which group contains the most elements?

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