Investigation - Water Pollution

Page 127

Tuesday, March 24, 2015Wednesday, March 25, 2015

Page 128

Investigation - Water Pollution

Warm Up:1.Workbook practice questions

a) Page 160, questions 1 – 3b) Page 169, questions 1 – 4c) Page 173, Discussion Question (above

the “Lesson Review”

Tuesday, March 24, 2015Wednesday, March 25, 2015

E.Q – Same from last class.

Homework: 1.Study for your test

Water Quality TestA-day, Friday, March 27th (test date change)

B-day, Thursday, March 26th

“Problem Based Investigation - Water Pollution” Textbook page NC8 Complete and “Turn in”

Common Processes to clean water

1.Boiling water• Heat kills parasites

2.Distillation • opposite of boiling• After water is boiled, collect

water vapor, cool it back to liquid water

3.Filtering • use filter paper to capture

particles4.Reverse osmosis

Force molecules through a membrane – the larger “harmful” particles can pass through the membrane

Factors That Effect Water QualityCause Effect

Temperature Thermal pollution, climate Excessive algae growth, low dissolved oxygen, fish kills (especially eggs)

Nutrients Chemical fertilizer runoff Fish kills, algae growth, low dissolved oxygen

Nitrates Chemical fertilizer runoff Fish kills, algae growth, low dissolved oxygen

pH Acids or bases in the water, dumping chemicals or garbage, acid rain

Fish kills, diseased organisms

Phosphate Chemical fertilizer runoff Fish kills, algae growth, low dissolved oxygen

Dissolved Oxygen Choppy water, aquatic plants, phytoplankton (algae)

High levels= good health of pond, low levels = Eutrophication

Turbidity Suspended particles in the water (sediments or organic)

Clear or cloudy

Eutrophication