A system of communication that uses symbols in a regular way to create meaning is?

________ are composed of one or more ________.

The Ring of Fire, a well-defined zone and belt of volcanic activity, is also known as __________. 

Crater Lake National Park is not actually a crater, but rather, is an example of a caldera.

During ____ stage children use symbols to represent words, images and ideas.

Of all plate boundaries, igneous rocks are least likely to be found at:

Nonmetallic minerals are denser than metallic minerals.

Igneous rocks can only be formed from sedimentary rocks in the rock cycle.

According to Bowen’s reaction series, which type of igneous material should form last, when magma temperatures are lowest?

Quartz (hardness value = 7) can scratch or cause abrasion to diamonds (hardness value = 10).