Lead your students on a fact-finding mission across the Web with Instructor's online rocks, gems, and minerals CyberHunt. Suitable for middle and upper graders, the CyberHunt is a great individual or group activity. Before you begin, distribute the CyberHunt Kids' Reproducible found at www.scholastic.com/cyberhuntkids

CYBERHUNT REPRODUCIBLE ANSWER GUIDE
1. Three layers of rock: the crust, the mantle, and the core.
2. Igneous rocks, sedimentary rocks, and metamorphic rocks.
3. Magma (hot liquid made of minerals) cools and makes crystals.
4. Three of the following: luster, hardness, color, streak, cleavage, crystal shape, and magnetism.
5. Mineral calcite, which comes from the beds of evaporated seas and lakes, and sea-animal shells.
6. Diamond, used 20% of the time for jewelry and 80% of the time for industry, such as phonograph needles and polishing and cutting tools.
7. Sphere-shaped rock containing a hollow cavity lined with crystals.
8. Minerals.
9. Air bubbles get trapped in the rock, working like air in a balloon. Floating rock can form by pebbles becoming cemented together, by being heated deep in the earth, or by getting expelled from a volcano.

Go to Kids' page

CYBERHUNT SAFETY: All of the Web sites contained in the CyberHunt and these extension activities have been reviewed by Instructor staff. At press time, all links are safe and consist of educational material. However, we are unable to control transfers or purchases of URLs after publication. We strongly urge teachers to review all Web sites before sharing them with students.

These activities will work best with Microsoft Internet Explorer 4.0, Netscape 4.0, or newer versions. Older browsers may experience difficulties with some links.

Instructor magazine. © 2002 Scholastic Inc.