Across
- 5. plates witch float on and travel independently over the earths mantle.
- 6. rock that has undergone transformation by heat and pressure.
- 9. rock formed from solidification of lava or magma
- 10. rock that has formed from sediment deposited by water or air.
- 12. the weakening of rock by plants, animals and microbes.
Down
- 1. movement in gas or liquid in which the warmer parts move up and the cooler parts move down.
- 2. process of rocks breaking apart without changing their chemical composition.
- 3. a large volcanic crater, especially one formed by major eruption leading to the collapse of the mouth of the volcano.
- 4. the arrangement of the natural and artificial physical features' of an area.
- 7. hot fluid or semi-fluid material below or within the earths crust from which lava and other igneous rock is formed on cooling.
- 8. rain water reacting with the mineral grains in rocks to form new minerals and soluble.
- 11. the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another.