Rock type identification worksheet for students.

Problem Analysis:

The task involves identifying the type of rock (Igneous, Sedimentary, or Metamorphic) based on descriptions and images. Let's break it down step by step.

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#### Part 1: Identify the type of rock from the given description

We are given three types of rocks:
- A. Igneous rock: Formed from the cooling and solidification of molten magma or lava.
- B. Sedimentary rock: Formed from sediments (particles of rock, minerals, or organic material) that are compacted and cemented together over time.
- C. Metamorphic rock: Formed when existing rocks are subjected to heat and pressure, causing them to change in texture or mineral composition without melting.

Now, let's match each description to the appropriate rock type:

1. "This type of rocks is formed from sedimentary rocks that undergo pressure and heat."
- This describes Metamorphic rock because metamorphic rocks are formed when sedimentary (or other) rocks are subjected to heat and pressure.
- Answer: C. Metamorphic rock

2. "This type of rocks is also called a fire rock."
- "Fire rock" refers to rocks formed from molten magma or lava, which is characteristic of Igneous rock.
- Answer: A. Igneous rock

3. "This type of rocks is formed from the sediments."
- Rocks formed from sediments are Sedimentary rock.
- Answer: B. Sedimentary rock

4. "This type of rocks is mostly found on the surface of the Earth."
- While all rock types can be found on the Earth's surface, Sedimentary rock is most commonly found there because it forms from weathered materials deposited in layers.
- Answer: B. Sedimentary rock

5. "This type of rocks is formed from molten magma."
- Rocks formed from molten magma are Igneous rock.
- Answer: A. Igneous rock

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#### Part 2: Fill in the type of the following rocks

We are given images and names of specific rocks. We need to classify each one as Igneous, Sedimentary, or Metamorphic.

1. Sandstone
- Sandstone is a Sedimentary rock because it is formed from sand grains that are compacted and cemented together.
- Answer: B. Sedimentary rock

2. Obsidian
- Obsidian is an Igneous rock because it is formed from rapidly cooled lava, resulting in a glassy texture.
- Answer: A. Igneous rock

3. Marble
- Marble is a Metamorphic rock because it is formed when limestone (a sedimentary rock) is subjected to heat and pressure.
- Answer: C. Metamorphic rock

4. Gypsum
- Gypsum is a Sedimentary rock because it forms from the evaporation of saltwater, leaving behind crystals that are compacted into rock.
- Answer: B. Sedimentary rock

5. Granite
- Granite is an Igneous rock because it is formed from the slow cooling of magma beneath the Earth's surface.
- Answer: A. Igneous rock

6. Slate
- Slate is a Metamorphic rock because it is formed when shale (a sedimentary rock) is subjected to heat and pressure.
- Answer: C. Metamorphic rock

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Final Answers:

#### Part 1:
1. C. Metamorphic rock
2. A. Igneous rock
3. B. Sedimentary rock
4. B. Sedimentary rock
5. A. Igneous rock

#### Part 2:
1. B. Sedimentary rock
2. A. Igneous rock
3. C. Metamorphic rock
4. B. Sedimentary rock
5. A. Igneous rock
6. C. Metamorphic rock

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Boxed Final Answer:

\[
\boxed{
\begin{array}{l}
\text{Part 1:} \\
1. \text{C. Metamorphic rock} \\
2. \text{A. Igneous rock} \\
3. \text{B. Sedimentary rock} \\
4. \text{B. Sedimentary rock} \\
5. \text{A. Igneous rock} \\
\\
\text{Part 2:} \\
1. \text{B. Sedimentary rock} \\
2. \text{A. Igneous rock} \\
3. \text{C. Metamorphic rock} \\
4. \text{B. Sedimentary rock} \\
5. \text{A. Igneous rock} \\
6. \text{C. Metamorphic rock} \\
\end{array}
}
\]