Fossils and Dinosaurs Quiz

Grade 3 · Science · Quiz

Test your knowledge of how fossils form, what dinosaurs were like, and what caused their extinction.

Questions

1. How do most fossils form?

   1. An animal is frozen in ice overnight
   2. An organism is buried in sediment that hardens into rock over millions of years
   3. Bones are collected and stored in a museum
   4. Animals leave tracks in concrete
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   Answer: An organism is buried in sediment that hardens into rock over millions of years

   Most fossils form through a slow process where organisms are buried in sediment (sand or mud) that compresses and hardens into rock over millions of years, preserving the remains.

2. Which of the following could become a fossil?

   1. A plastic toy
   2. A leaf impression in mud that later becomes rock
   3. A metal coin buried in the ground
   4. A wood carving made by humans
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   Answer: A leaf impression in mud that later becomes rock

   Fossils form from once-living organisms. A leaf impression trapped in mud that becomes rock is a natural trace fossil. Plastic, metal, and carved wood are not from living organisms.

3. What do paleontologists do?

   1. Study living animals in the wild
   2. Predict the weather using fossils
   3. Study ancient fossils to learn about past life on Earth
   4. Grow plants in a science lab
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   Answer: Study ancient fossils to learn about past life on Earth

   Paleontologists excavate and study fossils to reconstruct what ancient organisms looked like, how they lived, and how life has changed over Earth's history.

4. Approximately when did non-bird dinosaurs go extinct?

   1. About 10,000 years ago
   2. About 1 million years ago
   3. About 66 million years ago
   4. About 500 million years ago
   Show answer

   Answer: About 66 million years ago

   Non-bird dinosaurs went extinct approximately 66 million years ago, likely due to the catastrophic effects of a large asteroid impact.

5. Which dinosaur was a large plant-eating dinosaur known for its long neck?

   1. T. rex
   2. Velociraptor
   3. Brachiosaurus
   4. Allosaurus
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   Answer: Brachiosaurus

   Brachiosaurus was a massive long-necked herbivore (sauropod dinosaur) that used its long neck to reach vegetation high in trees.

6. What type of rock are fossils most commonly found in?

   1. Igneous rock
   2. Metamorphic rock
   3. Sedimentary rock
   4. Volcanic rock
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   Answer: Sedimentary rock

   Fossils are found in sedimentary rock, which forms from layers of sand, silt, and mud that compact and cement together over time.

7. Footprints left by a dinosaur in ancient mud can be preserved as a fossil.

   Show answer

   Answer: True

   Trace fossils are evidence of an animal's activity, such as footprints or burrows, preserved in rock. Dinosaur footprints are a common type of trace fossil.

8. Scientists believe that modern ______ evolved from a group of two-legged dinosaurs.

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   Answer: birds

   Strong fossil and genetic evidence shows that modern birds descended from theropod dinosaurs, making them the only living dinosaur descendants.

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