Rock and Mineral Identification Quiz

It looks like you've uploaded a worksheet titled "Rocks and Minerals (Assessment)" with multiple-choice and true/false questions related to rocks and minerals. Since I can't view images directly, I’ll help you solve the problems based on the text you’ve provided.

Let me go through each question one by one, provide the correct answers, and explain why they are correct.

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Q1: Write T for True or F for False

1. Rocks never change.
✘ False
→ Rocks do change over time due to weathering, erosion, heat, pressure, and other geological processes. This is part of the rock cycle.

2. Rocks are composed of minerals.
✔ True
→ All rocks are made up of one or more minerals. For example, granite contains quartz, feldspar, and mica.

3. Rocks are constantly being formed and destroyed.
✔ True
→ The rock cycle shows that rocks are continuously transformed from one type to another through natural processes.

4. There are three main types of rocks: igneous, sedimentary, and metamorphic.
✔ True
→ These are the three major rock types based on how they form.

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Q2: Fill in the blanks with suitable words

> "A mineral is a naturally occurring solid with a definite chemical composition and an orderly internal structure. It has a definite shape and color. Three fragments of the same mineral will have the same properties."

- Mineral
- Chemical composition
- Internal structure
- Properties

✔️ These are standard definitions in geology. A mineral must be:
- Naturally occurring
- Inorganic
- Solid
- Definite chemical composition
- Ordered internal structure (crystalline)

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Q3: Which one of the following is NOT a sedimentary rock?

(Images likely show different rocks — but here's what we know.)

Sedimentary rocks form from sediments (like sand, silt, mud) that are compacted and cemented together. Examples include:
- Sandstone
- Shale
- Limestone

NOT sedimentary: Granite → This is an igneous rock (forms from cooled magma).

So, if one of the options is granite, it’s the correct answer (not sedimentary).

✔ Answer: Granite

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Q4: Which one of the following is NOT an igneous rock?

Igneous rocks form from cooled magma/lava. Examples:
- Basalt
- Granite
- Obsidian

If one of the choices is limestone, that’s sedimentary.

✔ Answer: Limestone (or any non-igneous rock shown)

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Q5: Which one of the following is a metamorphic rock?

Metamorphic rocks form when existing rocks are changed by heat, pressure, or chemically active fluids.

Examples:
- Marble (from limestone)
- Slate (from shale)
- Schist

So, if one of the options is marble, that’s a metamorphic rock.

✔ Answer: Marble (assuming it's among the choices)

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Q6: What type of rock is formed when molten rock cools and crystallizes?

This describes igneous rock formation.

✔ Answer: Igneous rock

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Q7: What type of rock requires weathering and erosion to form?

Weathering breaks down rocks into sediments; erosion moves them. Sedimentary rocks form from these sediments.

✔ Answer: Sedimentary rock

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✔ Summary of Answers:

| Question | Answer |
|--------|--------|
| Q1.1 | F |
| Q1.2 | T |
| Q1.3 | T |
| Q1.4 | T |
| Q2 | Mineral, Chemical composition, Internal structure, Properties |
| Q3 | Granite (or whichever is not sedimentary) |
| Q4 | Limestone (or whichever is not igneous) |
| Q5 | Marble (or whichever is metamorphic) |
| Q6 | Igneous rock |
| Q7 | Sedimentary rock |

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🔍 Explanation Recap:

- Igneous rocks = from cooling magma/lava.
- Sedimentary rocks = from sediments (weathering + erosion + compaction).
- Metamorphic rocks = from transformation under heat/pressure.
- Minerals = natural, inorganic solids with definite composition and crystal structure.

Let me know if you'd like this formatted as a printable answer sheet or need help identifying specific rocks from the image!