Earth's History - Regents Earth Science

In what type of rock are most fossils found?

• Igneous

• Metamorphic

• Sedimentary

What is the name of the contact metamorphic rock found at A?

• Slate

• Sandstone

• Quartzite

• Marble

What is the oldest rock in the image?

• Shale

• Igneous rock

• Quartzite

• Sandstone

What is the youngest rock in the image?

• Shale

• Igneous rock

• Quartzite

• Sandstone

If a fossil has 25% of its C-14 left, how many half lives have passed?

• 1

• 2

• 3

• 4

If a fossil has 25% of its C-14 left, how old is it?

• 16 years old

• 5,700 years old

• 11,400 years old

• 17,100 years old

Which radioactive isotope is used to date formally living, young samples?

• Carbon-14

• Potassium-40

• Uranium-238

• Rubidium-87

The mass extinction of dinosaurs took place at the END of which period?

• Quaternary

• Silurian

• Cretaceous

• Paleogene

Salt and gypsum were deposited in evaporite basins during this time period.

• Silurian

• Permian

• Paleogene

• Cambrian

The index fossil, Cooksonia, could be found in this landscape region.

• Adirondack Mountains

• Erie-Ontario Lowlands

• Atlantic Coastal Plain

• Taconic Mountains