Warm Up, November 6 th, 2014 1)Explain why upwelling occurs and what does it do when it occurs?...
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Transcript of Warm Up, November 6 th, 2014 1)Explain why upwelling occurs and what does it do when it occurs?...
Warm Up, November 6th, 20141) Explain why upwelling occurs and what does it do
when it occurs?2) What are the two key ingredients needed for
eutrophication to occur?
3 Observations2 Inferences
Physics again: proving Newton right!
• Bowling Ball and Feathers, in a vacuum!
Water Quality – Guided Notes- pH level- temperature (thermal pollution)- turbidity- bio-indicators- dissolved oxygen- salinity- phosphates and nitrates (Phosphorous and
Nitrogen)
Water Quality – Thermal pollution- Changing the water quality by adding
heated water to a non-heated water source.
Water Quality – Turbidity- Turbidity is how cloudy a substance is,
basically. Which picture is more turbid?
- Which would you rather swim in…?
Water Quality – Dissolved oxygen- The amount of oxygen (yes the gas)
dissolved into water. It gets there by rapid movement of water, diffusion, and as a byproduct of photosynthesis!
Water Quality – SalinityHow much salt is in water, should know this.
PPT means parts per thousand. For example, if in 1000 grams of water, there are 30 grams of salt, it’s ocean water!
When the canary flies into the mine,
if it survives, it’s safe to go into the mine!
The canary (BIOlogical life) INDICATES it’s SAFE!!!!!!
If a bio-indicator doesn’t survive, it’s not safe!
• Canary doesn’t make it. • Neither will the miners!
BIO-INDICATORS can tell us when our environment is harmful.
So let’s say you just bought a nice home somewhere on Lake Norman.
• But what if the water around your home could be bad? That’d be awful & expensive ($$$).
• You could test for dissolved oxygen, pH, nitrates, even turbidity. But there’s an easier way.
Sensitive critters can warn you!BIO-INDICATORS
• Small living things are more sensitive to our environments & can tell us when our water, food, land or air is not safe.
• That’s a bio-indicator!
Each group picks 3 bug samples found at Lake Norman.
These bugs were found Living in the water near your new beach home!
Identify your bugs, draw your house on Lake Norman, and draw the bugs in the water with their names.
KEY – Bug Names
1. Mayfly2. Crayfish3. Clam4. Fishfly5. Sowbug6. Leech7. Scud8. Caddisfly9. Riffle Beetle Larva10. Black Fly11. Dragonfly12. Water Penny13. Planarian
14. Dobsonfly15. Mussel16. Riffle Beetle Adult17. Stonefly18. Lunged Snail19. Whirlgig20. Midge21. Aquatic Worm22. Alderfly23. Cranefly24. Gilled Snail25. Damsel Fly
Once you’ve identified your dead bugs, add up their value to the environment!
These bugs are worth 12.• Mayfly• Caddisfly• Water Penny• Planarian• Dobsonfly• Stonefly
These bugs are worth 4.• Leech• Midge• Aquatic Worm• Gilled Snail• Black Fly• Lunged Snail
The rest are worth 8 points each.