The BIG crossword on "THE ROCK CYCLE" @ doc brown's chemistry

FOR PRINTING OUT ONLY, answers found via KS3 chemistry link above
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Across:

3. It happens to rock deep in the Earth's crust. (5)
4. The whole process! (4,5)
7. The rate at which rocks get recycled is very (4)?
9. (9)? is a sedimentary rock made from the mineral remains of sea organisms.
10. Type of igneous rock with larger crystals from slow cooling of magma deep in the Earth. (7)
11. Igneous rock of small crystals from fast cooling lava. (6)
12. This is what volcanoes do best for the tourist?! (5)
14. A rough value for the pressure or temperature to make metamorphic rocks! (4)
16. (5)? is a metamorphic rock used for roofing.
17. Type of rock made from cooled magma or lava. (7)
18. Molten rock that flows from a volcano. (4)
22. Limestone and sandstone are examples of this kind of rocks. (11)
23. From slower cooling of magma, granite crystals compared to basalt crystals! (6)
24. (6)? is a metamorphic rock formed from limestone.
26. Very hot molten rock coming up from the mantle. (5)
27. Compounds of this metal give sedimentary rocks an orange or brown colour. (4)
28. When this is slow you get bigger igneous rock crystals from magma. (7)

Down:

1. The base of Hawaii is mainly formed from small ones formed when lava rapidly cools in the air or sea. (8)
2. Add this to limestone and it fizzes. (4)
3. Type of rock made from pre-existing rocks under the action of high temperature and pressure. (11)
5. If this doesn't happen, you cannot get rocks from magma or lava! (5)
6. This mode of cooling makes small igneous rock crystals like basalt. (4)
7. A kind of sedimentary rock, often red or orange due to iron compounds. (9)
8. It has a high value deep in the crust. (8)
10. These make volcanic rocks light and porous (3,7)
13. When this is high, rocks can be changed into another kind of rock without melting. (11)
15. A light porous volcanic rock. (6)
19. One way by which sand grains are transported around. (4)
20. It can be very dramatic, dangerous and unpredictable! (7)
21. Sand grains are this! (5)
25. A tree flung out from volcanoes? (3)