This Grade 3 medium-1 worksheet uses fossils as evidence of past life and environments. Grade 3 students work with words like extinct, mammoth, dinosaur, mold, cast, sediment, and climate, and they match vocabulary such as paleontologist and extinct with simple examples. The worksheet includes nine fill-in-the-blank items and one matching set to build Grade 3 reasoning about how fossils reveal the past in careful ways.
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Fossils and Evidence of Past Life
Part A: Fill in the Blank
Write the missing word or number on each line.
1. An animal that no longer lives anywhere on Earth is said to be extinct.
2. If a sea creature fossil is found on a mountain, that area was once under water.
3. Large, hairy elephants called mammoths lived long ago and are now extinct.
4. Big reptiles known as dinosaurs are extinct but are well known from fossils.
5. Fossils of ferns in icy places tell us the climate was once warmer there.
6. A hardened copy of a shell made of minerals is called a cast.
7. The hollow shape left in rock by a shell is called a mold.
8. Fossils form best when organisms are quickly buried in sediment .
9. Scientists compare fossils to modern animals to learn what extinct ones were like.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Extinct
→ No longer living anywhere on Earth
A scientist who studies fossils
Trace fossil
→ Footprint left in mud long ago
Footprint left in mud long ago
Body fossil
→ Bone preserved in rock
Bone preserved in rock
Paleontologist
→ A scientist who studies fossils
No longer living anywhere on Earth
Fossils and Evidence of Past Life
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) An animal that no longer lives anywhere on Earth is said to be extinct.
2) If a sea creature fossil is found on a mountain, that area was once under water.
3) Large, hairy elephants called mammoths lived long ago and are now extinct.
4) Big reptiles known as dinosaurs are extinct but are well known from fossils.
5) Fossils of ferns in icy places tell us the climate was once warmer there.
6) A hardened copy of a shell made of minerals is called a cast.
7) The hollow shape left in rock by a shell is called a mold.
8) Fossils form best when organisms are quickly buried in sediment .
9) Scientists compare fossils to modern animals to learn what extinct ones were like.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Extinct
→ No longer living anywhere on Earth
A scientist who studies fossils
Trace fossil
→ Footprint left in mud long ago
Footprint left in mud long ago
Body fossil
→ Bone preserved in rock
Bone preserved in rock
Paleontologist
→ A scientist who studies fossils
No longer living anywhere on Earth
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10 Questions
10-15 minutes
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