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The remains or trace of an organism that lived long ago is called...

• fossil

• species

• extinct

• endangered

Which of these is NOT a fossil?

• footprints left by an animal thousands of years ago.
• a leaf print from thousands of years ago.
• a picture of an animal from long ago.
• the remains of a dinosaur that have turned to stone.

A fossil animal has a mouth full of sharp, pointed teeth.  What can you infer about the animal?

• The animal ate fruits and vegetables.
• The animal is closely related to a shark.
• The animal did not live on land.
• The animal ate meat.

How are an elephant and mammoth alike?

• both are extinct
• both have tusks
• both have thick, shaggy fur
• both live in warm climate

Which of the following is NOT something you could learn from a fossil?

• The size of the animal
• What the animal ate
• The color of the animal
• Where the animal lived

What would cause an ecosystem to change quickly?

• a gradual climate change
• a lake becoming a marsh
• a lake drying up
• an earthquake

Which layer of rock are the oldest fossils usually found?

• bottom layer

• top layer

• middle layer

Which can help scientists learn about animals from the past?

• fossils

• photographs

• rocks

• lakes

Most saber-toothed cats lived

• with the dinosaurs

• during the Ice Age

• before dinosaurs

• in the 18th century

Which of the following best describes why the saber-toothed tiger became extinct?

• The cat shrunk in size until there was nothing left.

• The cat was unable to find food.

• The cat moved to another continent

• The cat is still alive today.