In this summer holiday, would you please complete the on-line assessment quizzes of our textbook publisher? (http://www.oupchina.com.hk) If you've lost your login name and password, please email me. Thank you.
Please do write down your name when you log in. It's easier for me to check your records. Many thanks!
Some students have already done the quizzes. They've raised good questions. Here are my responses.
Let's strive for excellence!
Chapter 2 MCQ 2
回覆刪除Which of the following drainage basins has the lowest drainage density?
(sorry I can't copy & paste the table here)
Ms Leung's response:
A. 6 / 3 = 2km / km2
B. 18 / 15 = 1.2km / km2
C. 25 / 27 = 0.93km / km2
D. 29/29 = 1km / km2
Chapter 2 MCQ 4
回覆刪除Which of the following diagrams CORRECTLY shows the relationship between
hydraulic radius and channel efficiency of a river?
[sorry i can't copy & paste the diagrams here]
Ms Leung's response:
The more the friction / wetted perimeter, the larger the hydraulic radius.
So the larger the hydraulic radius, the lower the channel efficiency.
Chapter 2 MCQ 5
回覆刪除Which of the following is the impact of deforestation to the water cycle?
1 Less infiltration
2 More overland flow
3 Less evapotranspiration
4 More throughflow
A. 1 and 2 only
B. 3 and 4 only
C. 1, 2 and 3 only
D. 1, 2, 3 and 4
Ms Leung's response:
The correct answer is C, but your answer is A.
Sounds like you don’t understand option (3).
When trees are cut, there will be less transpiration. There may be some more evaporation of soil moisture. When evaporation and transpiration are summed up, the total amount is reduced.
Chapter 2 MCQ 10
回覆刪除Which of the following is measure that helps avoid coastal erosion?
A. Dredging
B. Landuse zoning
C. Coral reef growing
D. Beach nourishment
Ms Leung's response:
Your answer is D, but the correct answer is C.
Beach nourishment can recover a beach affected by coastal erosion, e.g. by refilling sea sand on the beach AFTER EROSION.
Coral reef growing can slow down sea currents, thus reducing coastal erosion