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A level //
Evidence of glacial retreat
Test your knowledge of glacier retreat and other glaciation processes with this 10-question A level quiz.
If you haven't already done it, work through the glacier retreat web enquiry on the PowerPoint. Or look at it again to help fill in any gaps in what you know!
HIGH SCORES
| Rank | Name | Score |
|---|---|---|
| 1st | KIT | 20 |
| 2nd | fin | 20 |
| 3rd | fin | 20 |
| 4th | fin | 20 |
| 5th | K.B | 20 |
| 6th | AVH | 20 |
| 7th | SSR | 20 |
| 8th | TOM | 20 |
| 9th | JJA | 20 |
| 10th | s c | 20 |
QUIZZES // Evidence of glacial retreat
Q1. Which one of the following describes the loss of ice from a glacier or ice sheet?
Ablation
Accumulation
Mass balance
Abrasion
Q2. Which one of the following can be both an ablation and an accumulation process?
Avalanching
Sublimation
Wind-blown snow
Basal melt
Q3. There is a point on a glacier where annual accumulation exactly matches annual ablation – the ELA. What does ELA stand for?
Equal line of ablation
Equilibrium line altitude
Equal line of accumulation
Exact line of altitude
Q4. Which one of these glacier scenarios would produce glacial retreat?
The amount of ice supplied to the glacier margin from up-glacier is equal to the amount lost by ablation
The amount of ice supplied to the glacier margin from up-glacier exceeds the amount lost by ablation
The amount of ice supplied to the glacier margin from up-glacier is less than the amount lost by ablation
There are seasonal changes in accumulation and ablation
Q5. Which one of these methods is used to measure the seasonal gain and loss of snow/ice from the glacier?
Snow pits
Precision GPS
Aerial photos
Ablation stakes
Q6. The average rate of glacier loss (retreat) per year is currently which one of the following:
-228 mm per year
-443 mm per year
-676 mm per year
-1,247 mm per year
Q7. Which one of the following types of moraine marks the maximum extent of glacier ice?
Recessional moraine
Terminal moraine
Lateral moraine
Medial moraine
Q8. Which of the following could be a way of dating the age of a series of recessional moraines in a glaciated valley?
Vegetation type
Clast orientation
Electric profiling
Cailleux’s Roundness Index
Q9. Which one of the following describes the thinning of a glacier due to the melting of ice?
Nivation
Lodgement
Downwasting
Backwasting
Q10. Paintings, photos, old maps and documents provide evidence that glaciers worldwide were significantly more advanced in the nineteenth century than they are today. What name is given to this period of glacial advance?
Southern Oscillation
Little Ice Age (LIA)
Medieval Warm Period
The Hockey Stick Pattern
Finished!
You scored this time. The more correct answers you give, and the fewer incorrect answers you guess, the better your score.
