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UNITS TOOLS STATIONS LAKE MERRITT
TRASH and MISCELLANEOUS
100 100 100 100 100
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400 400 400 400 400
500 500 500 500 500
What are the units of temperature?
ANSWER
What are the units of dissolved oxygen (D.O.)?
ANSWER
What are the units of salinity?
ANSWER
What are the units of pH?
ANSWER
What are the units of Secchi depth?
ANSWER
What measures water clarity?
ANSWER
What measures salinity?
ANSWER
What measures dissolved oxygen?
ANSWER
What measures pH?
ANSWER
What measures temperature?
ANSWER
Which station is near the tide inlet from San Francisco Bay?
ANSWER
Which station is in the middle of the lake?
Answer
Which station is near the bird islands?
Answer
Which station is near Fairyland and marks the inlet from Glen
Echo Creek?
Answer
Which station is at the shore near the lake classroom?
Answer
Degrees Celsius
Parts per thousand, ppt
No units.
Centimeters
The Secchi disk
The refractometer
Vacuum ampoules (tubes) and colorimetric test.
pH strip
Thermometer
Station 12
Station 9
Station 5
Station 17
Parts per million (ppm)
The dock
What is an estuary?
Answer
A place where fresh water and salt water mix.
What is a watershed?Answer
The area of land that drains into a body of water.
What is urban run-off?
Answer
Trash and chemicals that wash off city streets.
Name 5 sources of water entering Lake Merritt.
Answer
1) Glen Echo Creek, 2) Trestle Glen Creek, 3) Storm drains (88!), 4) S.F. Bay, 5) rain.
Storm drains lead to…Answer
Natural waterways like Lake Merritt
What is a dead zone?Answer
An area of water where living things get killed by a lack of
dissolved oxygen.
What level of dissolved oxygen is needed for aquatic life in Lake
Merritt
Answer
5 ppm
List at least 3 things the plankton told Titus and Charles Ford. (100 bonus points for each additional
thing!). Answer
You are too big. Why don’t you worship the sun? Why do you
throw trash in the Lake? Why do you waste energy?
What is the difference between storm drain water and sewer
water?ANSWER
Answer
Storm drain water goes directly to Lake Merritt or other
waterways. Sewer water goes to the water treatment plant before
it is released into the Bay.
What two conditions at Lake Merritt have been cited by the
E.P.A. as below acceptable levels?
Low dissolved oxygen and trash in the water.
Name 3 dangerous chemicals found in urban run-off.
ANSWER
Copper from brake pads, motor oil, paint, fertilizers, insecticides.
What is the “Big Flush” and when does it occur?
The washing down of huge amounts of trash from the storm
drains into the Lake. This occurs after the first big rainfall of the year, usually in November or
December.
In 1870, Lake Merritt made environmental conservation
history. What happened in that year?
Lake Merritt was declared the first National Wildlife Refuge.
