1. You should understand how ice forms. You should consider how a glacier operates as a system.

2. 1. Changes in the earth’s position in space, its orbit and tilt 2. Variations in sunspot activity, changing the amount of solar radiation received by the Earth 3. Changes in the amount of volcanic dust affecting the amount of radiation reflected and trapped by the atmosphere 4. Trapping of CO2 by the oceans 5. Variations in ocean currents

6. INPUTSTransfers Outputs Is this an open or a closed system? Stores

9. 1.Label your diagram 2.What do the terms net accumulation zone and net ablation zone mean? 3.What is meant by the term Net Glacial Balance? 4.How might this vary over time? 5.How might this vary with location?