Metamorphic rocks worksheet with classification flowchart and true/false questions.

Let’s solve this step by step.

First, we know that metamorphic rocks are rocks that have changed from other rocks due to heat and pressure. They can be classified into two main types:
→ Foliated rocks (have layers or bands)
→ Nonfoliated rocks (no layers, more uniform)

Looking at the word bank:
- Foliated rocks examples: Slate, Gneiss
- Nonfoliated rocks examples: Quartzite, Marble

Now let’s fill in the diagram from top to bottom.

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Top oval: The big category is “Metamorphic rocks” — because everything below is about classifying them.

So:
→ Top oval = Metamorphic rocks

It says “Can be classified as” → so next level splits into two ovals:

Left oval = Nonfoliated rocks
Right oval = Foliated rocks

(We’ll confirm with examples below.)

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Under Nonfoliated rocks, it says “Two examples are” → look at word bank: Quartzite and Marble are nonfoliated.

So left side:
→ First example oval = Quartzite
→ Second example oval = Marble

Then under each, it asks “Which forms from?”

We need to know what parent rock each metamorphic rock comes from.

From geology basics:
- Quartzite forms from Sandstone
- Marble forms from Limestone

So:
→ Under Quartzite: Sandstone
→ Under Marble: Limestone

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Under Foliated rocks, “Two examples are” → from word bank: Slate and Gneiss

So right side:
→ First example oval = Slate
→ Second example oval = Gneiss

Then “Which forms from?”

- Slate forms from Shale
- Gneiss can form from Granite (or sometimes shale, but granite is listed and fits here)

So:
→ Under Slate: Shale
→ Under Gneiss: Granite

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Now True or False section:

1. Metamorphic rocks form only from sedimentary rocks.
→ FALSE. They can form from igneous, sedimentary, OR even other metamorphic rocks.

2. An igneous rock like granite can be formed into a metamorphic rock like gneiss.
→ TRUE. Granite (igneous) under heat/pressure becomes gneiss (metamorphic).

3. Marble can form from an igneous rock like basalt.
→ FALSE. Marble forms from limestone (sedimentary), not basalt. Basalt would become something else (like amphibolite).

4. Heat and pressure only affect sedimentary and igneous rocks, not metamorphic rocks.
→ FALSE. Metamorphic rocks can be changed again by more heat/pressure — they’re not “final”.

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Final Answer:

Diagram Fill-ins (top to bottom, left to right):

Top oval: Metamorphic rocks

Left branch:
→ Oval 1: Nonfoliated rocks
→ Example 1: Quartzite → forms from Sandstone
→ Example 2: Marble → forms from Limestone

Right branch:
→ Oval 2: Foliated rocks
→ Example 1: Slate → forms from Shale
→ Example 2: Gneiss → forms from Granite

True or False:
1. False
2. True
3. False
4. False