Grade 4 Earth science worksheet introducing the three types of weathering: physical, chemical, and biological. Students practice fixing grammar in subject-verb sentences about ice cracking rocks, acid rain dissolving limestone, and tree roots splitting stone. Fill-in items reinforce sediment vocabulary, and short answers ask for everyday examples. Students examine real-world examples like cracked sidewalks and ancient cliffs in this Grade 4 worksheet that strengthens earth science vocabulary.
Style:
Earth's Changing Surface
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
Physical weathering happen when ice freezes inside rock cracks.
Rewrite: Physical weathering happens when ice freezes inside rock cracks.
2. Fix the sentence:
Acid rain dissolve the limestone on old statues slowly.
Rewrite: Acid rain dissolves the limestone on old statues slowly.
3. Fix the sentence:
Tree roots growing into cracks breaks rocks apart over time.
Rewrite: Tree roots growing into cracks break rocks apart over time.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. When water freezes inside a rock crack, it expands and causes physical weathering.
2. Acid rain reacting with limestone to dissolve it is an example of chemical weathering.
3. Tree roots pushing into stone cracks is called biological weathering.
4. All weathering processes work to break down rocks into smaller pieces called sediment.
Part C: Short Answer
Answer each question in one or two complete sentences.
1. Explain how freezing water can crack a large rock over many winters.
Water seeps into tiny rock cracks, then freezes and expands about 9 percent. The ice pushes the crack walls apart. After many freeze-thaw cycles, the crack grows until the rock splits.
2. Give one example of biological weathering you might see near your school.
Tree roots growing under a sidewalk can crack the concrete as they push upward. Mosses and lichens on rocks also release weak acids that slowly break the rock surface.
Earth's Changing Surface
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
Physical weathering happen when ice freezes inside rock cracks.
Rewrite: Physical weathering happens when ice freezes inside rock cracks.
2) Fix the sentence:
Acid rain dissolve the limestone on old statues slowly.
Rewrite: Acid rain dissolves the limestone on old statues slowly.
3) Fix the sentence:
Tree roots growing into cracks breaks rocks apart over time.
Rewrite: Tree roots growing into cracks break rocks apart over time.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) When water freezes inside a rock crack, it expands and causes physical weathering.
2) Acid rain reacting with limestone to dissolve it is an example of chemical weathering.
3) Tree roots pushing into stone cracks is called biological weathering.
4) All weathering processes work to break down rocks into smaller pieces called sediment.
★ Part C: Short Answer
Answer each question in one or two complete sentences.
1) Explain how freezing water can crack a large rock over many winters.
Water seeps into tiny rock cracks, then freezes and expands about 9 percent. The ice pushes the crack walls apart. After many freeze-thaw cycles, the crack grows until the rock splits.
2) Give one example of biological weathering you might see near your school.
Tree roots growing under a sidewalk can crack the concrete as they push upward. Mosses and lichens on rocks also release weak acids that slowly break the rock surface.
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9 Questions
15-20 minutes
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