Biology Chapter 17 History of Life

In it’s young age, scientists believe that Earth was a made of what?

• Water & Sand

• Aliens

• Mangoes & Papayas

• Molten body with volcanic

  features.

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What was Earth's early atmosphere like?

• Greenhouse Gasses

• Rainbows & Lollipops

• The same way it is now.

• Nobody is certain.

Where can we find clues about what Earth was like in the beginning and what species lived during that time?

• Rocks

• Blood

• Water

• Air

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To find out when the first organisms formed, scientists study what?

• AP Human Notes

• Fossils

• Chickens

• Chemicals

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Do Most Organisms Leave Fossils?

• Yes

• No

• Maybe

A scientist who studies fossils is called what?

• Archaeologist

• Biochemist

• Paleontologist

• Physical Therapist

What is relative dating?

• Determines age of rocks by comparing

  them to rocks in other sediment layers.

• Dating your Ex twice in a row.

• Determines the age of bones by comparing them to bones in other continents.

• No clue...gotta study!

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What is radiometric dating?

• Radiating your partner till they give you answers.

• Determines the age of rocks by using the decay of radioactive isotopes in the rocks.

• You know what...I'm gonna take a nap.

• Determines the age of bones by using the decay of radioactive isotopes in the bones.

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What is the Theory of Biogenesis?

• Biodegradable products are good for the environment!

• I'm gonna get a 100% on this Test

• ONLY living organisms produce living organisms (Pasteur’s Experiment)

• (Jeopardy Theme Song)

Scientists do not know the early steps that led to life on Earth. They must continue to ask questions, test theories and evaluate new evidence as they seek to understand answers about the origin of life.

• True

• False