Volcanoes and Eathquakes: Sudden Changes: Literacy and Language Through Content

By Gen Phelan

The crust, mantle, and core are layers of Earth. The crust is broken into sections called plates. Plates move slowly and change Earth's surface. Volcanoes form when melted rock reaches the surface. Most volcanoes form at plateboundaries. Earthquakes happen when rocks suddenly move along fault lines. This causes the ground to shake.

• Format: Unknown Binding
• Language: English
• ISBN: 1433400855
• ISBN13: 9781433400858
• Release Date: January 2008
• Publisher: Millmark Education
• Length: 24 Pages