History of Life on Earth

True or False: Most fossils on earth will never be found

• True

• False

Click to enlarge. Study this carefully. Which fossil in the oldest?

• Fossil 1

• Fossil 2

• fossil 3

Most fossils are formed within which kind of rock?

• sedimentary

• metamorphic

• igneous

• they form equally in all types of rock

Describes a group of living things that are no longer living.

• fossil

• extinct

• endangered

• dinosaur

If a scientist found a fish fossil in the desert, what can they infer?

• An animal ate the fish.

• The water covered the area long ago.

• Today's fish looks the same

• The fish is endangered.

Scientist study the ____________________ to learn about the history of life, past environments on Earth, and how different groups of organisms have changed over time.

• fossil record

• animal record

• historical record

• Earth record

What does the Law of Superposition tell us?

• The most superior rock is the top layer of rock

• The oldest rock is the most top layer of rock

• The youngest rock is the most top layer of rock

• The strongest rock is the most top layer of rock

Place the following in order starting with the OLDEST
1  Paleozoic
2  Cenozoic
3  Precambrian
4  Mesozoic

• 1 3 2 4 
• 3 1 4 2
• 4 3 2 1 
• 2 3 1 4

What are fossils that are abundant, easily recognizable, short lived, and widespread called?

• Preserved fossils

• Index fossils

• Imprints

• Radioactive dating

Which era was the longest, taking up 88% of geologic time?

• Precambrian

• Paleozoic

• Mesozoic

• Cenozoic