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Geography
Geography(planet earth)
| Question | Answer |
|---|---|
| what is the equator? | The imaginary line running halfway between the poles |
| How often does the earth rotate on its axis? | Every 24hours |
| At what angle is the earth tilted at? | 23 1/2 degrees |
| How often does the earth orbit the sun? | Every 365 1/4 days |
| How much of the earths surface is covered by water? | 2/3 |
| Explain the structure of the earth | Crust, mantle, outer core and inner core |
| What is magma? | The rock in a molten state witch flows around in a slow-moving current |
| What do plates move around in? | Convection currents |
| What are fold mountains? | The outcome of plates in collision. E.g the Rocky Mountains, North America |
| What are volcanoes? | The outcome of plates in separation. E.g Hawaii |
| What are mid-ocean ridges? | The outcome of plates in separation. E.g the Pacific Ring of Fire |
| What is Pangaea? | When all the land on the earth was once a supercontinent |
| Name 3 major plates on the earth | The African plate, the American plate, the Australian plate |
| What are earthquakes? | The result of plates in collision or when plates slide past each other. It is a violent shaking of the earth |
| What is the focus? | The point within the crust where to earthquake occurs |
| What is the epicenter? | The place on the surface found directly above the focus |
| What are aftershocks? | Small tremors after the earthquake |
| What is the Richter scale? | The item used to measure the force of the earthquake |
| What a seismometer? | The instrument that identify's tremors on the crust |
| Give three effects of earthquakes | Loss of life, damage to buildings, gas and electricity damage |
| What are Tsunamis? | Giant tidal waves that are generate as a result of an earthquake occurring on the ocean floor |
| What is an active volcano? | A volcano that erupts regularly, e.g Mount St Helena, USA |
| What is a dormant volcano? | A volcano that hasn't erupted in a long time but may erupt again, e.g Cotopaxi in Peru |
| What is an extinct volcano? | A volcano that hasn't erupted in recorded history, e.g Slemish Mountain ,Ireland |
| List three advantages of volcanoes | Tourism, creation of new land and building material |
Created by:
Chimozukee
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