History of Life on Earth

Fossil are the remains of an organism that is preserved in the Earth

• True

• False

The way to determine which of two fossils is older is

• Absolute Dating

• Elemental Dating

• Relative Dating

The way to determine the actual age of fossils is

• Absolute Dating

• Elemental Dating

• Relative Dating

A type of rock made of hardened sediment

• Igneous

• Metamorphic

• Sedimentary

A species that has no living members today is called

• Threatened

• Extinct

• Endangered

Fossils do not consist of bones, bone fragments, imprints, and preserved remains

• True

• False

How can scientists determine the relative age of a fossil

• Radioactive Dating

• Compare it with fossils found in other rock layers

• Chemical Dating

How can scientists determine the absolute age of a fossil

• Radioactive Dating

• Compare it with fossils found in other rock layers

• Chemical Dating

Organisms began living on Earth about 3.8 billion years ago.  Then 1.2 billion years ago, ______ evolved

• multicellular organisms

• single celled organisms

• humans

Unicellular organisms are those organisms that are made up of a single cell

• True

• False