Age of Earth Review

Evidence about ancient climates indicates that _______.

• glacial ice once covered todays warm tropical regions
• continents in the Northern Hemisphere today were once centered over the South Pole
• continents in the Southern Hemisphere today were once centered over the North Pole
• no continents occupied the Southern Hemisphere

New ocean crust is formed at __________.

• transform fault boundaries
• convergent boundaries
• continental volcanic arcs
• divergent boundaries

The thermal convection that drives plate motion is caused by ________.

• seafloor spreading
• an unequal heating in the mantle
• gravity
• subduction

T/F: Geologist use radioactive dating to find the absolute age of rocks

• True
• False

T/F: Carbon- 14 can only be used to date organic materials less than 70,000 years old.

• True
• False

What happens to pressure as we move from the crust to the inner core?

• Pressure Decreases
• Pressure Increases
• Nothing

What happens to temperature as we move from the crust to the inner core?

• Decreases
• Increases

Identify layer  #20.

• mantle
• asthenosphere
• inner core
• outer core

What is the correct order (starting from the surface) of Earth's layers?

• crust, outer core, inner core, mantle
• mantle, outer core, inner core, crust
• crust, mantle, outer core, inner core
• outer core, inner core, crust, mantle

Name the three types of heat transfer.

• conduction, convection, radiation
• lithosphere, conduction, x-rays
• ROY G BIV
• waves, sunlight, heat