What is a fossil?

• Evidence of life from long ago that is at least 10,000 years old

• A type of rock

• A living dinosaur

• A type of plant

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How do scientists learn about dinosaurs today?

• By studying fossils

• By observing living dinosaurs

• By reading ancient texts

• By using computer simulations

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What process turns dinosaur bones into fossils?

• Fossilization

• Erosion

• Photosynthesis

• Metamorphosis

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What can paleontologists learn from studying dinosaur teeth?

• The kinds of food dinosaurs most likely ate

• The color of the dinosaur's skin

• The dinosaur's lifespan

• The dinosaur's habitat

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What event caused the extinction of dinosaurs?

• A huge event that destroyed much of life on Earth

• A volcanic eruption

• A massive flood

• A disease outbreak

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Dinosaurs are a group of reptiles that lived long ago. When did they first walk the earth?

• 66 million years ago

• 100 million years ago

• 245 million years ago

• 45 million years ago

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Based on the text, what can be concluded about the area in which a fossil is found?

• It has stayed the same throughout the years.

• It has harmed animals that get close to the area.

• It has erased all signs of living things from long ago.

• It has changed throughout the years.

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