Sci Chp 7 # 5 : Locating Igneous Rocks

Which of the following statements concerning igneous rocks is NOT true?

• They can form at the ocean floor.

• They can form when magma fails to cool and solidify.

• They can form where tectonic plates converge.

• They can form where tectonic plates diverge.

What is the name of the theory that states that the earth's crust is broken up into plates?

• 1. Igneous metamorphosis

• 1. Plate tectonics

• 1. Lithospheric convergence

• 1. Subduction

Which of the following terms is used to describe an area where one tectonic plate is pushed under another plate?

• rift zone
• collision zone
• convergent zone
• subduction zone

What can happen in areas where tectonic plates diverge?

• 1. One plate sinks into the deeper layers of earth and melts.

• 1. Magma from below the crust can squeeze up through the gap.

• 1. Volcanoes form.

• 1. One plate subducts below the other.

Which of the following statements concerning tectonic plates is FALSE?

• 1. They can be made up of continental crust or oceanic crust.

• 1. They are always stationary.

• 1. The Ring of Fire is an area where tectonic plates converge.

• 1. One plate can be pushed below another plate.