Metamorphic Rocks crossword puzzle for educational use.

Metamorphic Rocks Crossword Puzzle Solution

Below is the solution to the crossword puzzle, along with explanations for each clue.

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#### Across:
1. 6. Type of rocks made when other rocks are subjected to heat and pressure (11)
- Answer: METAMORPHIC
- Explanation: Metamorphic rocks are formed when existing rocks are subjected to heat and pressure, causing them to change their mineral composition or texture without melting.

2. 7. A metamorphic rock formed from sandstone (9)
- Answer: QUARTZITE
- Explanation: Quartzite is a hard, non-foliated metamorphic rock that forms from the metamorphism of sandstone.

3. 8. Very hard rock that burns with a high heat and little smoke. A metamorphic rock formed from coal (10)
- Answer: ANTHRACITE
- Explanation: Anthracite is a type of coal that is very hard and burns with high heat and little smoke. It is also considered a metamorphic rock due to its formation under extreme pressure and temperature.

4. 11. A metamorphic rock formed from granite (6)
- Answer: GNEISS
- Explanation: Gneiss is a foliated metamorphic rock that forms from the metamorphism of granite or other igneous rocks under high temperatures and pressures.

5. 13. The kind of metamorphism that occurs when rocks come into contact with a heat source such as magma and the rocks surrounding the heat source get cooked (7)
- Answer: CONTACT
- Explanation: Contact metamorphism occurs when rocks are heated by magma intrusion, causing changes in their mineral composition and texture.

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#### Down:
1. 1. A soft metamorphic rock composed of the mineral talc (9)
- Answer: SOAPSTONE
- Explanation: Soapstone is a soft metamorphic rock primarily composed of talc, which gives it a soapy feel.

2. 2. Parallel alignment of minerals that have been subjected to stress (9)
- Answer: FOLIATION
- Explanation: Foliation refers to the parallel arrangement of minerals in metamorphic rocks, often caused by directed pressure during metamorphism.

3. 3. A kind of force that gets exerted as tectonic plates push against each other (8)
- Answer: COMPRESSION
- Explanation: Compression is a type of stress that occurs when tectonic plates push against each other, leading to folding and faulting of rocks.

4. 4. Another word for change (5)
- Answer: ALTER
- Explanation: Alter is a synonym for "change," which is relevant in the context of metamorphism, where rocks undergo physical and chemical changes.

5. 5. A metamorphic rock formed from basalt (6)
- Answer: SCHIST
- Explanation: Schist is a foliated metamorphic rock that can form from the metamorphism of basalt under high pressure and moderate temperature.

6. 6. A metamorphic rock formed from limestone (6)
- Answer: MARBLE
- Explanation: Marble is a metamorphic rock that forms from the recrystallization of limestone under high pressure and temperature.

7. 9. The kind of metamorphism associated with mountain building where rocks are subjected to high temperature and pressure (8)
- Answer: REGIONAL
- Explanation: Regional metamorphism occurs over large areas, typically associated with mountain-building processes, where rocks are subjected to high temperatures and pressures.

8. 10. Something needed for contact metamorphism to occur (4)
- Answer: MAGMA
- Explanation: Contact metamorphism requires the presence of magma, which provides the heat necessary for the transformation of surrounding rocks.

9. 12. A metamorphic rock formed from shale (5)
- Answer: SLATE
- Explanation: Slate is a metamorphic rock that forms from the low-grade metamorphism of shale under moderate pressure and temperature.

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Filled Crossword Grid:

```
1 2 3 4 5 6 7 8 9 0 1 2 3
1 M E T A M O R P H I C
2 Q U A R Z I T E
3 A N T H R A C I T E
4 S O A P S T O N E
5 F O L I A T I O N
6 A L T E R
7 S C H I S T
8 M A R B L E
9 R E G I O N A L
10 M A G M A
11 S L A T E
```

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Final Answer:

\boxed{METAMORPHIC, QUARTZITE, ANTHRACITE, GNEISS, CONTACT, SOAPSTONE, FOLIATION, COMPRESSION, ALTER, SCHIST, MARBLE, REGIONAL, MAGMA, SLATE}