Across
- 1. average temperature
- 4. formed when sea ice breaks up during the summer
- 6. Shelf the floating edge of an ice sheet that spills out onto the sea: it is composed of freshwater ice
- 7. the two times of the year when the sun is furthest from the equator
- 8. a slanting or sloping angle. When the sun's rays are at an oblique angle, a given amount of heat at high latitude is extended over a larger area than at low altitudes.
- 9. shapes in the ice that appear due to the sculpturing of the wind
- 12. Treaty an agreement signed by 42 countries in 1961 that aims to protects Antarctica and its resources
- 13. strong polar winds that are created as cold air descends from the polar plateau
- 15. the warming of the atmosphere and the Earth, which many scientists believe is caused by the burning of fossil fuels
- 17. people the descendants of the original inhabitants of an area
- 18. a system formed by the interactions of the living organisms (plants, animals and humans) and physical elements of the environment
- 19. a snowstorm accompanied by very strong winds
- 20. a line joining places of equal temperature
Down
- 2. the ability to meet the needs of the present generation without compromising the ability of future generations to meet their needs
- 3. the condensation in the atmosphere that falls as rain, hail, snow or dew
- 5. Change any change in climate over time, whether due to natural processes or human activities
- 10. a huge piece of ice that breaks off a glacier or ice shelf and floats out to sea
- 11. barren lands located between isotherms 0degrees and 10 degrees Celsius. The subsoil is permanently frozen, allowing only small vegetation growth.
- 14. an unchanged natural area remote from human settlement
- 16. a layer of gases that surround the earth and filter out dangerous ultraviolet light from the sun