Biology Field Trip. Freshwater stream. Introduction. Field site location: Freshwater stream habitat at Ho Chung Date: 10 th May 2004 Time: 1:00 pm – 4:00 pm Weather: sunny, hot and windy. Physical factors. Light intensity Temperature Current speed. Light Intensity.
Biology Field Trip
Result: the light intensity in the stagnant water is higher than that of the running water.
Result: the temperature in still water is higher than that of running water
Result: the current speed in running water is
higher than that of still water
Result: pH value in running water is higher than that of stagnant water
( both value are lower than 7)
Result: thus, still water contains more phosphate than running water (lower than the government standard)
Result: The ammonia content in still water is higher than that of running water
Result: the conductivity of still water is higher than the running water.
Total suspended solids
Result: the suspended solids in still water is
higher than running water
Adaptation of freshwater animals
From the investigation, we found out that the water is clean from all factors (lower than the government standard)
Both water zone are scored for 2 marks
From: Lingnan Hang Yee Memorial Secondary School