This Grade 3 fossil formation worksheet guides young scientists through how bones slowly turn to stone. Students fix sentence errors about sediment and minerals, fill in blanks about pressure and millions of years, and answer true or false questions about quick burial and groundwater. Kid-friendly Grade 3 hints and short explanations make the long fossil timeline feel clear, simple, and exciting for every curious learner today.
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Fossils and Evidence of Past Life
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Fossils form in just a few day when animals die in Grade 3 science.
Rewrite: Fossils form over millions of years when animals die in Grade 3 science.
2. Fix the sentence:
When an animal dies, sediment cover it very quickly in Grade 3 lessons.
Rewrite: When an animal dies, sediment covers it very quickly in Grade 3 lessons.
3. Fix the sentence:
Pressure and minerals turns buried bones into rock in Grade 3 science class.
Rewrite: Pressure and minerals turn buried bones into rock in Grade 3 science class.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. In Grade 3 science, layers of mud and sand that bury a dead animal are called sediment.
2. In Grade 3 science, tiny bits of minerals seep into bones and slowly replace them with stone.
3. In Grade 3 science, fossils usually take millions of years to form under the ground.
4. In Grade 3 science, heavy pressure from upper layers squeezes sediment into solid rock.
Part C: True or False?
Read each statement. Circle True or False.
1. In Grade 3 science, a fossil can form in one afternoon if the animal is buried fast.
True False
2. In Grade 3 science, being buried quickly by sediment helps an animal become a fossil.
True False
3. In Grade 3 science, minerals in groundwater can slowly replace bone with stone.
True False
Fossils and Evidence of Past Life
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
Fossils form in just a few day when animals die in Grade 3 science.
Rewrite: Fossils form over millions of years when animals die in Grade 3 science.
2) Fix the sentence:
When an animal dies, sediment cover it very quickly in Grade 3 lessons.
Rewrite: When an animal dies, sediment covers it very quickly in Grade 3 lessons.
3) Fix the sentence:
Pressure and minerals turns buried bones into rock in Grade 3 science class.
Rewrite: Pressure and minerals turn buried bones into rock in Grade 3 science class.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) In Grade 3 science, layers of mud and sand that bury a dead animal are called sediment.
2) In Grade 3 science, tiny bits of minerals seep into bones and slowly replace them with stone.
3) In Grade 3 science, fossils usually take millions of years to form under the ground.
4) In Grade 3 science, heavy pressure from upper layers squeezes sediment into solid rock.
★ Part C: True or False?
Read each statement. Circle True or False.
1) In Grade 3 science, a fossil can form in one afternoon if the animal is buried fast.
True
False
2) In Grade 3 science, being buried quickly by sediment helps an animal become a fossil.
True
False
3) In Grade 3 science, minerals in groundwater can slowly replace bone with stone.
True
False
Ready to Practice?
Complete each section carefully.
10 Questions
15-20 minutes
Auto-graded
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