Terms and definitions of certain natural hazards and disasters.
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| 703475561 | Natural Hazard | Any natural process that is a potential threat to human life and property | 0 | |
| 703475562 | Natural Disaster | Great destruction or loss of life caused by natural forces rather than by human actions | 1 | |
| 703475563 | Oceanic Trench | Oceanic ______ are the result of a subduction zone, where an oceanic plate slides under a continental plate. The crevice that is left behind in between the diving oceanic plate and the continental plate is the ______. | 2 | |
| 703475564 | Mid Oceanic Ridges | __________ are places on the earth's lithosphere where there are two plates sliding away from each other (divergent boundaries), it is a place where magma from the mantle is shooting upwards and cooling rapidly in the ocean to form new rock and fill in the gaps as the two plates are moving apart over time. | 3 | |
| 703475565 | Volcano | A weak spot in the crust where magma has come to the surface | 4 | |
| 703475566 | Earthquake | Shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity | 5 | |
| 703475567 | Tsunami | Seismic sea wave that begins over an earthquake focus and can be highly destructive when it crashes on shore | 6 | |
| 703475568 | Epicentre | The point on the Earth's surface directly above the focus of an earthquake | 7 | |
| 703475569 | Atmospheric Hazard | A hazard or disaster that is associated with certain weathers such as cyclones, blizzards, hailstorms, bush fires etc. | 8 | |
| 703475570 | Hydrological Hazard | A hazard or disaster that is associated with water issues, for example Flooding, Glaciers and Wave action (Tsunamis) | 9 | |
| 703475571 | Geological Hazard | A Hazard or disaster that is associated with the land, and tectonic movement, such as earthquakes and volcanoes | 10 | |
| 703475572 | Biological Hazard | A hazard or disaster that is focused on humans, like diseases epidemic, famines and plagues. | 11 | |
| 703475573 | Divergent Boundary | When two plates are moving away from each other. | 12 | |
| 703475574 | Convergent Boundary | When two plates are being pushed together or colliding. | 13 | |
| 703475575 | Transform Boundary | When two plates are moving in opposite directions against eachother. | 14 | |
| 703475576 | Subduction Zone | When an oceanic plate dives under a continental plate. | 15 | |
| 703475577 | Ring of Fire | The pacific oceanic plate is constantly moving apart at the mid ocean ridge, and diving under surrounding continental plates. The places where it is diving under the continental plates causes many volcanoes and earthquakes to occur in a ring like shape. | 16 | |
| 703475578 | Pangaea | All continents were joined together at the beginning of time and were known as the super continent _______. | 17 | |
| 703475579 | Convection Current | When magma in the mantle is rotating, it heats and rises, then when it is so close to the crust it cools then sinks, it heats up again and continues in that current. | 18 | |
| 703475580 | Lithosphere | The outermost layer of the mantle and the crust. | 19 | |
| 703475581 | Crust | The outermost layer of the earth. | 20 | |
| 703475582 | Mantle | The middle and thickest layer of the earth. | 21 | |
| 703475583 | Core | The center of the earth. | 22 | |
| 703489247 | Focus | The exact point in the earth's crust where plates are colliding or sliding against each other. | 23 | |
| 703489248 | Richter Scale | The scale that helps to represent how extreme an earthquake is. | 24 |
