Rocks and Fossils
How Old?
What Category Is This?
100

A type of rock that most fossils are found in.

What is sedimentary rock?

100

A form of this dating technique could include looking at a stack of pancakes to determine hold old they are.

What is relative dating?

100

The plane along which rocks can slide or shift up, down, sideways, or at an angle in the Earth's crust.

What is a fault?

200

This type of rock is the easiest to use absolute dating techniques on.

What is igneous rock?

200

Radioactive dating techniques are used on these to help scientists determine the age of the Earth.

What are meteorites?

OR

What are moon rocks?

200

The name of the UNESCO World Heritage site where the bones of more than 55 dinosaur species have been found.

What is Dinosaur Provincial Park?

300

A type of fossil that helps geologists to determine the age of other fossils and rocks in a given area.

What is an index fossil?

300

Comparing the positions of igneous intrusions and faults in rocks helps to determine this kind of age.

What is relative age?

300

The upper-limit of the existence timespan of a good index fossil.

What is 1 million years?

400

This happens when an animal or plant is buried quickly and decays, leaving a cast in the ground which is filled in by sediments.

What is fossilization?

400

4.6 billion years is the number related to this important concept in geology.

What is the age of the Earth?

OR 

What is the age of the Solar System?

400

A kind of boundary that can form when top layers of rock are weathered and eroded away, and newer layers form on top of the weathered area.

What is an uncomformity?

500

The mineral name of oldest crystal ever found on Earth.

What is zircon?

500

4.5 billion years is the number related to this important concept in geology.

What is the half-life of uranium?

500

This is the name of a marine index fossil used to date other fossils found in the same rock layer.

What is an ammonite?


OR 

What is a trilobite?

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