Jeopardy Fossils Relative Aging Absolute Dating Geologic Time Earth’s History 100 100 100 100 100 100 200 200 200 200 200 200 300 300 300 300 300 300 400 400 400 400 400 400 500 500 500 500 500

This is a hollow area in sediment in the shape of an organism

Mold A 100

This provides evidence of the activities of ancient organisms

Trace Fossils A 200

This type of fossil is created when minerals replace all or part of an organism

Petrified A 300

This is the change or advancement of life over long periods of time

Evolution A 400

Scientist that studies fossils

Paleontologist A 500

This is the age of a rock compared to other rocks around it B 100

Relative Age B 100

This is created when magma cools and hardens within the Earth’s surface B 200

Intrusion B 200

This is created when lava cools and hardens on the surface of the Earth B 300

Extrusion B 300

This law states that the oldest rock layer is found at the bottom and each higher layer is younger than the layer below it B 400

Law of Superposition B 400

These fossils help geologists match the ages of rock layers. The fossils were created by organisms that were only one Earth for a relatively short period of time Trilobites existed for 6% of Earth’s history B 500

Index Fossil B 500

When the amount of radioactive element decreases during radioactive decay, what happens to the amount of the stable element? C 100

Increases C 100

This is the time it takes for half of the radioactive atoms to decay in a radioactive element

Half-Life C 200

This occurs when the elements of a radioactive element break down into a stable element.

Radioactive Decay C 300

DAILY DOUBLE DAILY DOUBLE C 400

What is the age of a rock that has 1/8 of the Potassium-40 that it started with. The half-life of Potassium-40 is 1.3 billion years. C 400

3.9 billion years C 400

What radioactive element is used to find the age of once-living organisms?

Carbon-14 C 500

How many billions of years old is the Earth according to scientists?

4.6 billion years D 100

What era name means “ancient” or “old”

Paleozoic D 200

What era name means “recent” or “new” D 300

Cenozoic D 300

What are eras subdivided into?

Periods D 400

This is a record of geologic events and the evolution of life forms of Earth’s History

Geologic Time Scale D 500

What kind of life was present during the Precambrian time?

Unicellular Life E 100

What is the significance of the boundary between Precambrian Time and the Paleozoic Era?

Explosion of Life E 200

Which era is considered the Age of Reptiles

Mesozoic E 300

Time span that lasted for 88% of Earth’s history

Precambrian Time E 400

Why were mammals and birds able to evolve in size (become larger) at the start of the Cenozoic Era?

Dinosaurs went extinct reducing the competition for resources

This is a break in the Earth’s crust F 100

Fault F 100

What do you call organisms that do not have a backbone F 200

Invertebrate F 200

The age of a rock represented in number of years that have passed since a rock formed

Absolute Age F 300

These are gaps in the geologic record caused by erosion F 400

Unconformity F 400

F 500

F 500