LIFE SCIENCES

What the definition of geological time scale

Calendar for the events in Earth's History

Its a study of fossils

It is where by a large number of species die out.

Remains of organisms that has been preserved in rocks.

Other

Please Specify:

Geological times

Period, Era, Eons

Era, Mesozoic, Pre-Cambrian

Cambrian, ordovician, period

Eon, Era, Period, Archaen

What are the remains of living organisms called?

Strata

Fossil

Evolution

Mineral

According to the fossil record, 99% of organisms that lived on Earth are......

Extinct

Surviving

Mutating

Endangered

Evidence for past events that have occurred during Earth’s ancient history is recorded in:

History books

Clothes people wore.

Written timelines

Fossils within rocks

5 The fossil record supports Darwin’s theory of evolution by demonstrating that plants and animals:

Are the same in various environments

Remain unchanged until extinction.

Existed for only a few thousands of years

Have changed over time

Scientists have discovered fossils of whale ancestors that have well developed hip and thigh bones, which are typically used for walking by mammals. Modern whales most likely evolved from ancestors who:

Evolved on land and remained on land.

lived in the sea, then became better adapted for land

lived on land, then became better adapted for the sea

Evolved in the sea and remained in the sea

In order to determine the relative age of fossils, scientists may use a type of fossil known as a(n):

index fossil

radioactive fossil

relative fossil

absolute fossil

Radiometric dating occurs by calculating the ratio between the original amount of radioactive isotopes present and the amount now remaining.

True

False

The shortest time interval on the geological timescale is called an epoch.

True

False

Palaentologist is a scientist that studies ancient life forms through fossils.

True

False

When a large number of organisms die out on a large scale it is called extinction

True

False

Rocks made of layers of sand deposited over time as a sediment

Sedimentary rock

Igneous rock

� evidence of the activity of an organism preserved in rock, but not the organism itself

Fossil fuel

Fossil traced

Trace fossil

LIFE SCIENCES

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