Plate Tectonics
Across
- 3. The point on the earth's surface directly above the focus
- 6. This occur when water mix with volcanic materials
- 7. The smallest and finest fragments of lava or rock that are ejected by volcanic eruptions
- 8. A scale that measures the damage caused by an earthquake
- 10. The zone where plates meet is called plate ...
- 12. The broken pieces of earth's crust
- 15. Constant rising and sinking of magma results in convection current causing plates to move is called plate ...
- 17. A lava that has high temperature, cools and solidifies slowly, has low viscosity and low silica content. So the lava flows quickly
- 18. A lava that has low temperature, cools and solidifies quickly, has high viscosity and high silica content. So the lava flows slowly
- 19. A plate boundary when two plates move away from each other
- 20. A plate boundary when two plates slide past each other
- 21. Plates move as a result of ... current generated in the mantle
Down
- 1. A crack in the earth's crust where the rock stressed by plate movements breaks and moves
- 2. A volcano that has a broad base with gentle slopes formed from basic lava
- 4. This flow occurs when gases mix with volcanic materials
- 5. A sudden vibration or tremor of the earth's surface
- 9. A volcano that consists of alternating layers of lava, ash and cinder. It has gentle slopes at its base and steeper slopes near its top
- 11. A machine used to detect and record earthquake
- 13. The source of the earthquake
- 14. A scale that measures the magnitude of an earthquake
- 16. A plate boundary when two plates move towards each other