The Rock Cycle — Earth Science 練習ワークシート
Rocks are classified into three main types based on how they form. Igneous rocks form from cooled magma or lava. Sedimentary rocks form from compressed and cemented sediments. Metamorphic rocks form when existing rocks are changed by heat and pressure.
The rock cycle shows how rocks transform over geologic time. Magma cools into igneous rock, which weathers into sediment, which lithifies into sedimentary rock, which can be buried and metamorphosed, which can melt back to magma.
No step in the cycle is required — any rock type can transform into any other given the right conditions. The cycle has no beginning or end.
練習するスキル
- Classifying rock types by formation process
- Tracing pathways through the rock cycle
- Identifying examples of each rock type
- Explaining weathering and erosion roles
練習ワークシート：The Rock Cycle
指示： 各問題を丁寧に解きましょう。途中式もはっきりと書きましょう。最終的な答えは、指定された場所または指示に従って別の用紙に書いてください。
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1.Which of the following is NOT one of the three main types of rocks?
- A. Igneous
- B. Sedimentary
- C. Metamorphic
- D. Volcanic
The Rock Cycle — 練習ワークシート（続き）
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2.What type of rock is formed from the cooling and solidification of magma or lava?
- A. Sedimentary
- B. Igneous
- C. Metamorphic
- D. Fossilized
The Rock Cycle — 練習ワークシート（続き）
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3.Describe how sedimentary rocks are formed. Include the role of weathering, erosion, deposition, compaction, and cementation in your answer.
The Rock Cycle — 練習ワークシート（続き）
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4.Which process changes sedimentary rock into metamorphic rock?
- A. Melting and cooling
- B. Weathering and erosion
- C. Heat and pressure
- D. Compaction and cementation
The Rock Cycle — 練習ワークシート（続き）
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5.Label the rock cycle diagram below with the following terms: Igneous Rock, Sedimentary Rock, Metamorphic Rock, Magma, Weathering & Erosion, Heat & Pressure, Melting, Cooling, Compaction & Cementation.; ; [Diagram Placeholder: Draw a circular diagram with arrows] ; ; Write your labels here (list the term next to the correct arrow or box number):; ; ; ; ; ; ; ; ;
The Rock Cycle — 練習ワークシート（続き）
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6.What is the process called when rocks are broken down into smaller pieces by wind, water, or ice?
- A. Deposition
- B. Erosion
- C. Weathering
- D. Melting
The Rock Cycle — 練習ワークシート（続き）
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7.True or False: Metamorphic rocks can only form from sedimentary rocks.
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8.Explain what happens to a rock during the process of melting in the rock cycle. Where does this typically occur?
The Rock Cycle — 練習ワークシート（続き）
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9.Which of the following is an example of an igneous rock?
- A. Limestone
- B. Granite
- C. Marble
- D. Shale
The Rock Cycle — 練習ワークシート（続き）
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10.List the three main types of rocks and give one example of each.
解答集
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1.
最終回答： D. Volcanic
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2.
最終回答： B. Igneous
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3.
最終回答： Sedimentary rocks form through weathering (breaking down rocks), erosion (transporting particles), deposition (settling), compaction (layers pressed together), and cementation (minerals bind particles).
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4.
最終回答： C. Heat and pressure
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5.
最終回答： Labels (clockwise from top): Magma → Cooling → Igneous Rock → Weathering — Erosion → Sediment → Compaction — Cementation → Sedimentary Rock → Heat — Pressure → Metamorphic Rock → Melting → back to Magma.
解答集（続き）
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6.
最終回答： C. Weathering
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7.
最終回答： False
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8.
最終回答： Melting occurs when a rock is heated to a high enough temperature to turn into liquid magma. This typically happens deep within the Earth's crust or mantle, often near tectonic plate boundaries or hotspots.
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9.
最終回答： B. Granite
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10.
最終回答： Igneous (e.g., granite), Sedimentary (e.g., limestone), Metamorphic (e.g., marble).
避けるべきよくある間違い
- Thinking all rocks must follow the same cycle path
- Confusing sediment with sedimentary rock
- Believing metamorphic rocks must melt to change
- Mixing up intrusive and extrusive igneous rocks
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最終更新：2026