Warm Up, November 6th, 2013
1)
2)
Explain why upwelling occurs and what it does
when it does occur?
What are the two key ingredients needed for
eutrophication to occur?
3 Observations
2 Inferences
Bill Nye – Finish Video (7:30)
Water Quality – Guided Notes
-
pH level
temperature (thermal pollution)
turbidity
bio-indicators
dissolved oxygen
salinity
phosphates and nitrates (Phosphorous and
Nitrogen)
Water Quality – pH level
- pH stands for the potential of Hydrogen in
water.
- Here’s the pH scale:
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 – Salinity
How 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!
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 – Phosphates and Nitrates
- Runoff, fertilizer, eutrophication...
$$$$$$$
Deep
underground
LET’S SAY: YOU WORK IN A GOLD MINE.
And the mine EXPLODES!
The lucky ones escape!
But not all of them…so how do you know
when it’s safe?
Use a BIO-INDICATOR!!!
Take a little canary for instance…
Canary as a bio-indicator
Toss one down the mine.
When the canary flies into the mine,
if it survives, it’s safe to go into
the mine!
The canary (BIOlogical life)
INDICATES it’s SAFE!!!!!!
A live canary is a BIO-INDICATOR that
it’s safe to enter a damaged mine.
If a bio-indicator doesn’t survive, it’s not safe!
• Canary doesn’t make it.
If a bio-indicator doesn’t survive, it’s not safe!
• Canary doesn’t make it.
• Neither will the miners!
BIO-INDICATORS can tell us when
our environment is harmful.
So let’s say you just bought a nice home
somewhere on Lake Norman.
• But what if the
water around
your home could
be bad? That’d be
awful & expensive
($$$).
• 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.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
Mayfly
Crayfish
Clam
Fishfly
Sowbug
Leech
Scud
Caddisfly
Riffle Beetle Larva
Black Fly
Dragonfly
Water Penny
Planarian
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
25.
Dobsonfly
Mussel
Riffle Beetle Adult
Stonefly
Lunged Snail
Whirlgig
Midge
Aquatic Worm
Alderfly
Cranefly
Gilled Snail
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.
The group with the highest number of
sensitive bugs (12 points) have the
healthiest water at their new beach
home!
Add up all 3 of your bug points to see
who had the most healthy bioindicators, happy at your new home!