| Across |
| 3. |
what the outer core is mostly made from, which means magma must also come from the crust |
| 4. |
literally means 'fragments' |
| 8. |
ash can eventually be helpful to humans because it makes soil more ________ |
| 11. |
the chemical that seems to determine how viscous different magma is |
| 12. |
has a high silica content which makes it more viscous |
| 13. |
how far ash can drift because it is small and light |
| 14. |
lava temperature can reach up to 1400 _______ |
| 17. |
tephra that had more gas in it leaves holes in the rock, making the rock _______ |
| 20. |
larger types of tephra fall _______ to the volcano |
|
|
| Down |
| 1. |
the largest type of tephra ejected from volcanoes |
| 2. |
the tephra type with a large amount of gas bubbles that have escaped |
| 5. |
has an intermediate or medium amount of the chemicals Fe, Mg, Ca, K, Na and silica |
| 6. |
literally means 'fire' |
| 7. |
the runniest type of magma |
| 9. |
all different types of material ejected into the air during an eruption |
| 10. |
the pyroclastic movement that is lighter, faster and far more deadly |
| 15. |
the reason lava is not so dangerous compared to other hazards is because it moves so ______ |
| 16. |
the least deadly volcanic hazard |
| 18. |
tephra that hardens to form a denser rock than pumice |
| 19. |
tephra that is smaller than 2mm |
|
