Exploring Prehistoric Plants and Extinctions

What is a fossil?

• A type of rock that forms from lava

• The remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock

• A type of plant that grows in deserts

• A type of mineral found in caves

Which of the following is a type of prehistoric plant?

• Fern

• Cactus

• Pine tree

• Rose bush

What is the geologic time scale?

• A tool used to measure the weight of rocks

• A system of chronological dating that relates geological strata to time

• A scale used to measure the height of mountains

• A calendar used by ancient civilizations

Which of the following is a division of the geologic time scale?

• Century

• Era

• Decade

• Year

What type of prehistoric plant?

• Ginko

• Palm

• Fern

• Umbrella leaf

What is one cause of mass extinction?

• Increase in plant growth

• Volcanic eruptions

• More rainfall

• Decrease in sunlight

How are fossils typically formed?

• By animals eating plants

• By organisms being buried quickly by sediment

• By plants growing over rocks

• By water washing away soil

What type of fossil plant?

• Conifer

• Horsetail

• Ginko

• Fern

Which of the following is NOT a type of prehistoric plant?

• Cycad

• Ginkgo

• Oak tree

• Horsetail

Name the fossilized plant?

• lycopods

• fern

• ginko

• limstone