3/20 A/B DayLEQ: How do we show our stewardship forthe limited natural resources in ourhydrosphere?1. Why would you rather have a lake house next to alake with low turbidity?2. What would you want the pH of your drinking water to be?3. What causes algal blooms?4. What are bio-indicators used for?5. Copy and complete: As the temperature of water increases, the amount of dissolved oxygen [increases/decreases].
Red: Frozen (70%)Green: Groundwater/Aquifers (29%)Purple: Lakes, Rivers, etc. (1%)
Today’s LEQ: How do we show our stewardship for the limited natural resources in our hydrosphere?By the end of today, you should be able to…1. List three ways that we are being stewards for our environment2. Explain two ways that we treat wastewater3. Explain the trade-offs that we face by protecting our hydrosphere
Activating Strategy:What do you know aboutthe oil spill in the Gulf of Mexico last year?
Discovery Education:Disaster in the Gulf: A Race against Time
CONTEXT CLUES:“She is a steward for the environment. She makes sure that she recycles, conserves electricity, and teaches others about ways to care for the earth. ”“He shows great stewardship for animals. He works at an animal shelter on the weekends, raises money for homeless dogs and cats, and helps pets get adopted into a good home.” Stop and Jot: Write your own definition of
How could you be a steward for theenvironment if there was another oil spill?
Ways YOU can be a steward for our hydrosphere:• Turn off the water while brushing your teeth• Put a bottle of rocks in your toilet tank so that less water is used each flush• Only wash full loads of laundry• Take shorter showers• Only run your dishwasher when it is full
How do we showour stewardship for the hydrosphere?
How do we show ourstewardship for the hydrosphere? We PASS LAWSWe MONITOR We TREAT ANDwater : water: REGULATIONS to protect water:
We MONITOR water :-we measure the quality of thewater around us to make sure that itstays healthyEx: -pH levels What are the different things we -bioindicators measure to tell if our water is -nitrate levels healthy or unhealthy? -temperature -dissolved oxygen level -turbidity
What can we determine about the water quality of this lake over time? Is it getting healthier or less healthy and how do you know?! Tempera Turbidity Dissolved Acidity Nutrient Algae ture Oxygen Level CountMarch 65 30 NTU 10 ppm pH = 7.1 Nitrates: 100 degrees .1 ppm coloniesApril 80 55 NTU 11 ppm pH = 9.2 Nitrates: 300 degrees .96 ppm coloniesMay 90 120 NTU 15 ppm pH = Nitrates: 350 degrees 12.4 1.5 ppm colonies
We TREAT water:Wastewater treatment plant: removescity waste from water and puts cleanwater back into lakes or tributaries
Discovery Education:The environmental impact of the toilet
Life before wastewater treatment plants…Many cities had no sewers andrelied on nearby rivers oroccasional rain to wash awaysewage. In some cities, wastewater simply ran down thestreets, which had steppingstones to keep pedestrians out ofthe muck, and eventually drainedas runoff into the localwatershed. This was enough inearly cities with few occupantsbut the growth of citiesquickly overpolluted streets andbecame a constant source ofdisease.
Many underdeveloped countries do nothave wastewater treatment systems today. Open Sewer
We TREAT water:Wastewater treatment plant: removescity waste from water and puts cleanwater back into lakes or tributariesSeptic system: removes waste from wateryou use in your house
We PASS LAWS AND REGULATIONS to protect water:Clean Water Act: Pick THREE key facts - about each one and - write them in your graphic organizer!Environmental Protection Agency: - -North Carolina Water Quality Standards: - -
Trade-Off: good things and bad thingsthat go along with our decisions Staying up late:
Should our water quality standards inNorth Carolina be STRICT or NOT STRICT? Trade Offs: -Keeps our -costs us a lot of drinking water money to regulate cleaner and enforce -Keeps our aquatic -can cause problems for farmers and the and terrestrial North Carolina food webs healthy economy
Make a brochure to explain your decision!Your brochure should include: -3 things that we are currently doing to be stewards for our hydrosphere -4 reasons for why you think our water quality standards should be more strict or less strict
Summarizer:Two students are having an argument.Kesha says that we are doing everythingwe can to be stewards for ourhydrosphere. Ron says that we are notdoing nearly enough. Write 5-7 sentencesto explain which student you think iscorrect. Be sure to give at least 4 reasonsexplaining WHY you chose this opinion.