Semester Test Study

Fossils are commonly preserved in what type of rock?

• Igneous

• Metamorphic

• Sedimentary

• Punk

What parts of organisms are typically fossilized?

• the skin

• the expression on their face

• hard parts--like bones and shells

Everything that has ever lived has been fossilized

• True

• False

Which of these choices is a trace fossil?

• Animal tracks

• Shells

• bones

• insect in amber

How do most changes on Earth occur?

• Gradually

• Suddenly

Which of these describes a species that has become extinct?

• fewer members of the species are dying than being born
• more members of the species are dying than being born
• very few members of a species are alive
• all members of a species have died

What is a mass extinction?

• When life is not affected by an event

• When multiple species from all over the earth suddenly go extinct

• When one species goes extinct due to habitat changes

• When all life on earth is wiped out

What is the Geologic Time Scale?

• old geologists

• sweet geology music

• Earth's history divided by major events and changes on Earth

• a list of every living thing ever

Paleozoic, Mesozoic & Cenozoic are all

• Epochs
• Eras
• Periods
• Eons

What type of event usually marks the end of an Era

• A Mass Extinction

• High School graduation

• An earthquake

• A Volcanic Eruption