Geologic Time Scale

These specialized fossils indicate to geologists the boundaries in geological time and determine the age of rocks.

• Index fossils

• Limestone fossils

• Amber fossils

• Cast fossils

Tags

NGSS.MS-ESS1-4

This chronological time chart is broken into different time chunks, the largest being the Eon, then Era, Period, and Epoch.

• Timeline

• Calendar

• Geological time scale

• Time chart

Tags

NGSS.MS-ESS1-4

In which time period are we currently living?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Tags

NGSS.MS-ESS1-4

Jellyfish are one of the oldest species on Earth. In what time period did they first appear?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

In what time period did Pangaea, the super continent, appear?

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Tags

NGSS.MS-ESS2-3

Dinosaurs, small mammals, and birds are found in this time period.

• Precambrian Time

• Paleozoic Era

• Mesozoic Era

• Cenozoic Era

Which fossil is the youngest?

• fossil A

• fossil B

• fossil C

• fossils A and B are the same age

Tags

NGSS.MS-ESS1-4

Determines the “relative” order of past events but not the absolute age.

• Absolute age

• Relative age

• Real age

• New age

Tags

NGSS.MS-ESS1-4

Approximately how old is the Earth?

• 4.6 billion years old

• 4.6 million years old

• 5 billion years old

• 5 million years old

Tags

NGSS.MS-ESS1-4

Uses the decay of radioactive elements to find the ___________________________ of a rock or fossil.

• Relative age

• Absolute age

• New age

• Real Age

Tags

NGSS.HS-PS1-8