Science worksheet for Grade 4 students at Sarasas Pattana School, focusing on identifying metamorphic rocks such as slate, gneiss, marble, and quartzite.

Here's the correct matching of the pictures with the rock types, along with an explanation for each:

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✔ 1. Slate Rocks
*Picture: Dark gray, flat, layered rock.*
Explanation: Slate is a fine-grained metamorphic rock that forms from shale or mudstone under low-grade metamorphism. It splits easily into thin, flat sheets — this property is called “slaty cleavage.” The image shows this characteristic layered, smooth surface.

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✔ 2. Marble Rocks
*Picture: White, crystalline, sometimes veined rock.*
Explanation: Marble is a metamorphic rock formed from limestone or dolomite. It’s usually white but can have colorful veins due to impurities. It has a sugary, crystalline texture and is often used in sculpture and architecture. The image matches this description.

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✔ 3. Gneiss Rocks
*Picture: Banded rock with alternating light and dark layers.*
Explanation: Gneiss is a high-grade metamorphic rock with visible banding (gneissic banding) caused by the segregation of minerals during intense heat and pressure. The image clearly shows these wavy, alternating bands — a hallmark of gneiss.

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✔ 4. Quartzite Rocks
*Picture: Reddish, hard, granular rock.*
Explanation: Quartzite forms from sandstone under high-grade metamorphism. It’s very hard, grainy, and often white or light-colored, but can be tinted red or pink due to iron oxide impurities. The image shows a reddish, tightly packed grain structure typical of quartzite.

> ⚠️ *Note:* Sometimes people confuse quartzite with marble, but quartzite is harder and doesn’t react with acid like marble does. The color and texture here suggest it’s quartzite.

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✔ 5. Metamorphic Rocks *(General Category)*
*Picture: Large rock formation/cliff face with vertical layers.*
Explanation: This picture likely represents a large outcrop or cliff made of metamorphic rock (possibly gneiss or schist). Since “Metamorphic Rocks” is the general category title, it makes sense to link it to the largest, most representative geological formation shown — emphasizing that all these rocks belong to the metamorphic group.

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✔ Final Matching:

1. → Slate Rocks
2. → Marble Rocks
3. → Gneiss Rocks
4. → Quartzite Rocks
5. → Metamorphic Rocks

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📌 Teaching Tip for Grade 4 Students:
You can remember them like this:
- Slate = Smooth and flat like a slate board.
- Marble = Pretty and shiny like statues.
- Gneiss = Has stripes like a zebra (banding).
- Quartzite = Very hard, like glassy sand.
- Metamorphic = All these rocks changed form under heat/pressure!

Let me know if you’d like a printable version or flashcards! 😊