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Examine the 1:50 000 Ordnance Survey map extract below and the accompanying legend which is available on page 30 and answer each of the following questions - Junior Cycle Geography - Question a - 2021
Question a
Examine the 1:50 000 Ordnance Survey map extract below and the accompanying legend which is available on page 30 and answer each of the following questions. The land... show full transcript
Worked Solution & Example Answer:Examine the 1:50 000 Ordnance Survey map extract below and the accompanying legend which is available on page 30 and answer each of the following questions - Junior Cycle Geography - Question a - 2021
Step 1
At which site on the map extract above, A or B, is freeze thaw action most likely to occur? Tick (✓) the correct box.
Answer
A
Freeze-thaw action is a weathering process that is most likely to occur in colder climates where there are frequent temperature fluctuations around the freezing point. Based on the map, site A is in an upland area, making it more susceptible to freeze-thaw processes.
Step 2
State one reason why freeze thaw action is most likely to occur at the site you chose.
Answer
Freeze-thaw action happens when water is repeatedly frozen and thawed. This type of weathering occurs in upland areas, as these regions experience rises and falls in temperatures that sometimes drop below freezing point (0°C), facilitating the cycle of freezing and thawing.