The History of Life

What Physical Evidence helps us understand the Past species on Earth?

• Volcano

• Fossils

• Soil

• Whales

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What do scientists use to date fossils?

• The Geological Time Scale

• A compass

• The looking at the stars

• Soil Scale

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Why might there not have been any water during the Hadean eon?

• Their was plenty of water

• The desert took over

• All water would have boiled away due to the Earth's heat.

• The water was cold

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What do scientist theorize caused the growth of eukaryotic organism?

• They believed more RNA will help eukaryotic

• They believed additional DNA correct help support eukaryotic.

• They believed that additional what will help eukaryotic

• They believed that the addition to oxygen to the atmosphere contributed to the growth of eukaryotic organism.

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In which era did organism begin to transition from oceans to land?

• The Mesozoic era

• The Paleozoic era

• The Quaternary period

• The Earth Climate

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What period marked the end of the age of reptiles?

• The Cretaceous period

• The Quaternary period

• The Paleozoic era

• The Geological Time

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When did Earth's Ice age begin?

• The Cretaceous period

• The Fossil era

• The Paleozoic era

• The Quaternary period

Why is there no evidence of mammals during the Mesozoic era?

• The mammals are warm blooded and did'nt survive in heat.

• It was the time of dinosaurs. The mammals wound not have been able to survive against such predators.

• It was a water drought and no animals survived.

• The fossil was blown aware and no evidence to collect data of existence.

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Why did the dinosaurs eventually die?

• When earth's climate changed, most of their food died. The dinosaurs starved.

• The earth changes and water was short.

• The climate change and other animals took over increased them.

• The dinosaurs attacked one another until they all died!

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What inspired Miller and Urey to use the substance that they did in their experiment?

• The origins of life

• The substance took over mammals and creation.

• The directions of circulation.

• The substances that they used were based on the substance that might have been present in the Earth's early atmosphere.