Abiotic Factors
What temperature does saltwater freeze at?
-2 degrees celsius.
Why is biodiversity important?
It helps the ecosystem thrive. (Answer can be flexible.)
What are the three main types of saltwater pollution?
Noise pollution, overfishing, and deep sea mining.
What is turbidity?
Clarity of water.
What is the average ocean depth?
3682 meters (estimations work)
Why are orcas important in the saltwater ecosystem?
Orcas are keystone species and necessary predators.
What’s the name of a common and unsustainable overfishing method used in ocean habitats?
Bottom Trawling.
is 150 mg/L of oxygen too high, too low or just right?
5-7 mg/L is healthy.
What is the average salinity of saltwater?
30 ppt - 37 ppt.
Why is ecosystem health important?
They support biodiversity, and provide food and protection for animals and humans alike. (Answers can be flexible.)
The Canadian government has goals to reduce waste by __% by 2030.
30%. (Will accept anywhere from 20% - 35%.)
What is spectrophotmetry?
The study of measuring the amount of absorbed light in a substance.
What are the 3 main minerals in saltwater?
Sodium Chloride, Magnesium, Calcium.
What kingdom does the Sun Coral belong to? (Think carefully!)
The kingdom Animalia.
What is a Guardian program?
An Indigenous program that focuses on monitoring and protecting bodies of water.
What problem for fish is caused by low salinity in saltwater?
Kidney failure.
What is the official name for the Twilight Zone?
Disphotic Zone.
What is the percentage of oxygen that phytoplankton produce?
50%. (Will accept answers from 30-55%.)
What is an ocean related tradition completed by Pacific Northwest Indigenous tribes?
Tribal Canoe Journey.
Name two ways to measure dissolved oxygen in saltwater.
The titration method, the diaphragm electrode method, and the fluorescence method