Rock type identification worksheet with descriptions and images of various rocks.

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 the accumulation and cementation of sediments (e.g., sand, mud, shells).
- C. Metamorphic rock: Formed from existing rocks that undergo changes due to heat, pressure, or chemical processes.

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 existing rocks (like sedimentary rocks) are subjected to high pressure and temperature.
- Answer: C. Metamorphic rock

2. "This type of rocks is also called a fire rock."
- "Fire rock" refers to rocks formed from molten material, 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 rocks.
- 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 rocks are most commonly found there because they form at or near the surface through processes like weathering, erosion, and deposition.
- Answer: B. Sedimentary rock

5. "This type of rocks is formed from molten magma."
- Rocks formed from molten magma are Igneous rocks.
- 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 and need to classify them as Igneous, Sedimentary, or Metamorphic.

1. Sandstone
- Sandstone is a Sedimentary rock because it forms from the compaction and cementation of sand grains.
- Answer: B. Sedimentary rock

2. Obsidian
- Obsidian is an Igneous rock because it forms from the rapid cooling of lava, resulting in a glassy texture.
- Answer: A. Igneous rock

3. Marble
- Marble is a Metamorphic rock because it forms from the metamorphism of limestone under high pressure and temperature.
- Answer: C. Metamorphic rock

4. Gypsum
- Gypsum is a Sedimentary rock because it forms from the evaporation of water in salt lakes or from chemical precipitation.
- Answer: B. Sedimentary rock

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

6. Slate
- Slate is a Metamorphic rock because it forms from the metamorphism of shale under moderate pressure and temperature.
- 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:

\[
\boxed{
\begin{array}{ll}
\text{Part 1:} & \text{1. C, 2. A, 3. B, 4. B, 5. A} \\
\text{Part 2:} & \text{1. B, 2. A, 3. C, 4. B, 5. A, 6. C}
\end{array}
}
\]