Seafloor Age and Igneous Rocks

Where are igneous rocks mostly created?

• At spreading centers in the oceans.

• In volcanoes.

• At cracks in the crust.

• At the poles.

What is the most common igneous rock?

• Pumice

• Obsidian

• Basalt

• Granite

What kind of plate boundary produces a mid-ocean ridge or spreading center?

• Convergent

• Transform

• Divergent

Tags

NGSS.MS-ESS2-2

How old is the oldest seafloor?

• 3 Billion Years Old

• 180 Million Years Old

• 100,000 Years Old

• 1.1 Billion Years Old

What does a half life represent?

• Half of the time something is alive.

• The amount of time an element is underground.

• The time it takes an element to decay to half its mass.

• The time it takes a tectonic plate to move 100 km.

Tags

NGSS.HS-PS1-8

What is the half life of Carbon-14?

• 150,000 Years

• 1,250 Years

• 2 Million Years

• 5,730 Years

Tags

NGSS.HS-PS1-8

What is the half life of Uranium-238

• 4.5 Billion Years

• 2.1 Billion Years

• 400 Million Years

• 250 Million Years

Tags

NGSS.HS-PS1-8

What is Carbon-14 useful for dating?

• Trees

• Some Fossils

• Bones

• All three options

What types of dating could you use to date dinosaur fossils?

• Uranium-235

• Uranium-238

• Carbon-14

• None of the above

How old is the oldest continental crust?

• 2.7 Billion Years

• 1.5 Billion Years

• 4.4 Billion Years

• 2.8 Billion Years