Three Types of Rock worksheet - Free Printable
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Step-by-step solution for: Three Types of Rock worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Three Types of Rock worksheet
Let's solve the worksheet step by step and provide clear explanations for each type of rock.
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#### 1. What is Sedimentary rock made up of?
Answer:
Sedimentary rock is made up of sediments—small particles of rock, minerals, organic matter (like plant or animal remains), and other materials that have been weathered, eroded, transported, and then deposited. These sediments are compacted and cemented together over time to form sedimentary rock.
Examples: Sandstone, shale, limestone, and conglomerate.
Explanation:
The image shows layers and fossils, which are typical features of sedimentary rocks. The presence of fossils indicates that organic material can be preserved in these rocks. Layers (or strata) form as sediments accumulate over time.
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#### 2. What is Metamorphic rock made up of?
Answer:
Metamorphic rock is made up of pre-existing rocks (igneous, sedimentary, or other metamorphic rocks) that have been changed by heat, pressure, or chemically active fluids deep within the Earth’s crust. This transformation alters the mineral composition and texture without melting the rock.
Examples: Marble (from limestone), slate (from shale), and quartzite (from sandstone).
Explanation:
The image shows a rock with a folded or banded appearance, which is typical of metamorphic rocks due to the intense pressure and heat causing minerals to recrystallize and align.
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#### 3. What is Igneous rock made up of?
Answer:
Igneous rock is made up of minerals that crystallize from molten rock material (magma or lava). When magma cools slowly beneath the Earth’s surface, it forms intrusive igneous rocks. When lava cools quickly on the surface, it forms extrusive igneous rocks.
Examples: Granite (intrusive), basalt (extrusive), obsidian (volcanic glass).
Explanation:
The image shows a sharp, angular rock with visible crystals or a uniform texture, indicating it formed from cooled magma or lava. The lack of layers or fossils supports this classification.
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| Rock Type | Made Up Of | How It Forms |
|-------------------|--------------------------------------------|-----------------------------------------------|
| Sedimentary | Sediments (rock fragments, minerals, fossils) | Deposition, compaction, and cementation |
| Metamorphic | Existing rocks transformed by heat/pressure | Heat, pressure, or fluids alter original rock |
| Igneous | Crystallized minerals from molten rock | Cooling and solidification of magma or lava |
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✔ Final Answers:
1. Sedimentary rock is made up of sediments like sand, silt, clay, and organic matter, which are compacted and cemented together.
2. Metamorphic rock is made up of existing rocks that have been changed by heat, pressure, or chemical processes.
3. Igneous rock is made up of minerals that crystallize from cooling magma or lava.
These answers should be written neatly in the blank lines on the worksheet.
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Worksheet 1: Rock Types
#### 1. What is Sedimentary rock made up of?
Answer:
Sedimentary rock is made up of sediments—small particles of rock, minerals, organic matter (like plant or animal remains), and other materials that have been weathered, eroded, transported, and then deposited. These sediments are compacted and cemented together over time to form sedimentary rock.
Examples: Sandstone, shale, limestone, and conglomerate.
Explanation:
The image shows layers and fossils, which are typical features of sedimentary rocks. The presence of fossils indicates that organic material can be preserved in these rocks. Layers (or strata) form as sediments accumulate over time.
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#### 2. What is Metamorphic rock made up of?
Answer:
Metamorphic rock is made up of pre-existing rocks (igneous, sedimentary, or other metamorphic rocks) that have been changed by heat, pressure, or chemically active fluids deep within the Earth’s crust. This transformation alters the mineral composition and texture without melting the rock.
Examples: Marble (from limestone), slate (from shale), and quartzite (from sandstone).
Explanation:
The image shows a rock with a folded or banded appearance, which is typical of metamorphic rocks due to the intense pressure and heat causing minerals to recrystallize and align.
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#### 3. What is Igneous rock made up of?
Answer:
Igneous rock is made up of minerals that crystallize from molten rock material (magma or lava). When magma cools slowly beneath the Earth’s surface, it forms intrusive igneous rocks. When lava cools quickly on the surface, it forms extrusive igneous rocks.
Examples: Granite (intrusive), basalt (extrusive), obsidian (volcanic glass).
Explanation:
The image shows a sharp, angular rock with visible crystals or a uniform texture, indicating it formed from cooled magma or lava. The lack of layers or fossils supports this classification.
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✔ Summary:
| Rock Type | Made Up Of | How It Forms |
|-------------------|--------------------------------------------|-----------------------------------------------|
| Sedimentary | Sediments (rock fragments, minerals, fossils) | Deposition, compaction, and cementation |
| Metamorphic | Existing rocks transformed by heat/pressure | Heat, pressure, or fluids alter original rock |
| Igneous | Crystallized minerals from molten rock | Cooling and solidification of magma or lava |
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✔ Final Answers:
1. Sedimentary rock is made up of sediments like sand, silt, clay, and organic matter, which are compacted and cemented together.
2. Metamorphic rock is made up of existing rocks that have been changed by heat, pressure, or chemical processes.
3. Igneous rock is made up of minerals that crystallize from cooling magma or lava.
These answers should be written neatly in the blank lines on the worksheet.
Parent Tip: Review the logic above to help your child master the concept of 3 types of rocks worksheet.
