Rock On!
A Trip To The Zoo
Time
Fossils!
Geologic Dating
100

This type of rock forms from swamp environments

What is coal?

100

Most fossils come from this type of environment

What is marine

100

This is the number of years have past after 2 half lives, if each half life is ten years.

What is 20 years

100
What is a fossil?
Fossils are the preserved remains or traces of ancient organisms.
100
The type of dating that categorizes events based upon chronological order.

What is relative dating?

200

This sediment is the smallest and needs a calm environment to settle

What is clay?

200
__________ is the disappearance of a species form all parts of its geological range.
What is extinction
200

This is the ratio of parent to daughter isotopes after 2 half lives

What is 1:3?

200

Ture or false: All fossils are composed of original material

What is False!

200
_______ means to be compared to something else.
What is relative
300
This type of rock is formed by sediment being pressed together.
What is Sedimentary Rock
300

This is the age of the earth.

What is 4.5 Billion years old?

300

This word means the length of time required for half of the radioactive atoms in a sample to decay.

What is half-life

300
This word means a principle that states that the oldest rocks and the fossils in those rocks are at the bottom and the youngest rocks and the fossils they contain are at the top.
What is Superposition
300

The type of dating that categorizes events based upon a numeric age.

What is absolute age dating?

400
This type of rock is formed by heat and pressure inside the earth.
What is Metamorphic Rock
400

This type of fossil may be found in tar, amber or frozen

What is original remains?

400

This geologic Eon comprises most of Earth's history

What is Precambrian?

400

These are 2 of the 4 criteria for an index fossil?

What is 

 1) abundant

2) Geographically widespread

3) Easy to ID

4) Relatively short lived

400

This law explains why the rock layer was deposited before the fold

What is original horizontality?

500
This type of rock is formed by the cooling of magma or lava.
What is Igneous rock
500
An _______ _______ is the remains of a species that existed on earth for relatively short periods of time, were abundant, and widespread geographically.
What is Index Fossil
500

This characteristic is resposible for earths layers.

What is density?

500

This type of fossil is used to date the rock layer and other fossils around it?

What is an index fossil?

500

How old is the earth?

What is 4.5 billion years

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