Geologic Time

What is the largest time frame on geologic time line

• eon
• era
• epoch
• period

Geothermal Gradient effects the layers ...

• Hotter as you go to core and softer the rocks became
• Hotter as you go to core and harder the rocks became
• Colder as you go to core and softer the rocks became
• Colder as you go to core and harder the rocks became

Which is the most recent time frame?

• Mesozoic 
• Precambrian
• Holocene
• Cretaceous

Known as the age of the mammals?

• Mesozoic Era
• Holocene Epoch
• Cenozoic Era
• Cambrian

Put this in order of smallest to largest time frame.

• Eon, Era, Periods, Epoch
• Periods, Epoch, Eon, Era,
• Epochs, Periods, Eras, Eons
• Eras, Periods, Epochs, Eons

Early atmosphere appeared 

• Periman
• Cenozoic
• Precambrain
• Phanerozic

Dinosaurs went extinct?

• Cenozoic Era
• Jurassic Period
• Triassic Period
• Carboniferous Period

Formation of Pangea

• 260 mya
• 200 mya
• 65 mya
• 4.5 bya

Heat source for the Core?

• Sun
• Mantle
• Radioactive Decay
• burning of coal

Why is the outer core liquid when it is the same make up as the inner core?

• Pressure on outer core is less so melting temp is higher
• Pressure on outer core is less so melting temp is lower
• Its not liquid its solid too.
• Pressure on outer core is less so melting temp is lower