Sci Chapter 5 Lesson 9: Paleomagnetism

Paleomagnetism is the study of ancient geomagnetic records preserved by rocks and minerals.

• True

• False

Certain rocks and minerals are susceptible to the magnetic field and will align with it during their formation. This signal remains in the rocks after formation and is called what?

• Transient magnetization
• Remanent magnetization
• Ephemeral magnetization
• Fleeting magnetization

What are hot spots?

• areas on the surface of the Earth that are located over mantle plumes

• Spots for cooling down
• Places with no temperature or activity
• Areas of low temperature or activity

Throughout geologic time, the Earth's magnetic field will occasionally switch or reverse polarity, meaning that the magnetic north pole will become the magnetic south pole, and vice versa.

• True

• False

Upon studying oceanic ridges, they discovered they were actually _____.

• 1. boundaries where tectonic plates were pulling apart

• 1. floating underwater islands

• 1. boundaries where continents meet the oceans

• glacial deposits