Unit 3: History of the Earth (Geology)

Front

What are the layers of the Earth in order from oldest to youngest?

Back

E, B, C, D, A

Front

What is a fossilized piece of evidence of an organism's activity, such as a footprint?

Back

Trace Fossil

Front

Which era is known as the 'age of reptiles (dinosaurs)'?

Back

Mesozoic Era

Front

What is the current geological era we are in?

Back

Cenozoic Era

Front

What is the half-life of iodine-131?

Back

8 days

Front

If 10 mg of iodine-131 is given to a patient, how much is left after 24 days?

Back

1.25 mg

Front

What is a mold fossil?

Back

A fossil that forms when an organism leaves an impression in sediment.

Front

What is a cast fossil?

Back

A fossil that forms when a mold is filled with minerals or other materials.

Front

What is a preserved fossil?

Back

A fossil that is preserved in its original form, such as amber or ice.

Front

What is the significance of the Paleozoic Era?

Back

It is known for the development of early life forms, including fish and amphibians.