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Water Quality; Marine Chemistry Flashcards | StudBud
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Water Quality; Marine Chemistry
Water Quality; Marine Chemistry
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Answers
1
There is only one dead zone.
False
True
2
What are INVASIVE SPECIES?
Species that are from the same location
Organisms that came from other countries or regions
Organisms that are non-native
The opposite of native species
3
Reverse osmosis is the only method of extracted salt from saltwater in the process of desalination.
False
True
4
Substances with a low pH value
are neutral.
are acidic.
are basic.
5
How can humans influence the amount of dissolved oxygen?
adding plants into the water
supplementing synthetic waves
adding aquatic life, such as fish
supplementing synthetic winds
6
As salinity increases....
Density increases
Density decreases
7
Fecal coliform bacteria
is used as an indicator of water quality
is the cause of many waterborne diseases
is another name for Cryptosporidium
usually causes diarrhea
8
What does desalination do?
It removes chemicals.
It removes salt and contaminants.
It removes salt from your french fries.
It is used to make heavy water for nuclear power stations.
9
Turbidity
How we measure pH
A measure of how easy it is to turn water
A measure of how clear water is
A measure of the color of water
10
What percent of the Earth is water?
80%
75%
71%
50%
11
A substance with a pH of 8.5 is
neutral
polar
an acid
a base
12
How does dissolved oxygen enter all water?
plant byproducts of photosynthesis
human-related activities
aeration of oxygen from the atmosphere
aquatic organisms
13
What is a dangerous level of dissolved oxygen?
11-12 mg/l
1-2 mg/l
8-9 mg/l
3-4 mg/l
14
Acids have a pH range from
Below 7
7
Above 7
15
Explain Ocean Acidification?
The burning of fossil fuels such as coal, oil and gas for human industry.
Caused by the uptake of carbon dioxide from the atmosphere.
Lowering of the ocean’s PH level due to increased levels of carbon dioxide.
Ocean acidification reduces the amount of carbonate in the seawater.
16
A pH of 7 is....
Neutral
Basic
Acidic
17
Threats to biodiversity are
habitat loss, climate change, human population growth
rain, human population growth, habitat loss
rain, arctic freezing, habitat loss
climate change, arctic freezing, human population growth
18
What percent of the Earth is water?
75%
50%
80%
71%
19
What is dissolved oxygen?
the amount of oxygen available to living aquatic organisms.
the absence of oxygen in bodies of water
a measure of how much oxygen is dissolved in the water.
amount of oxygen available in the atmosphere
20
Ocean Acidification is caused by
oil drilling
burning fossil fuels
illegal dumping
acid rain
21
Turbidity can be expressed as...
Biological Oxygen Demand (BOD)
Total Suspended Solids (TSS)
Normal Turbidity Units (NTU)
Dissolved Organic Matter (DOM)
22
What gas is released as a product of photosynthesis and captured by the test tube shown below?
hydrogen sulfide
oxygen
water vapor
carbon dioxide
23
pH stands for
Power of Hocotate
Potential of hydrogen
People of Hawaii
Phosphorus and hydrogen
24
How can distillation make pure water?
when you go to Mcdonalds and order a glass of water
You spit in the water making is pure and clean
cleaned through a machine in a factory
The saltwater is boiled creating fresh water
25
Bases have a pH of...
>7
3
<7
8
26
How often do you make chemistry jokes?
Never.
Every other day.
Always.
Periodically.
27
Which is NOT a property of water?
cohesive
adhesive
hydrogen bonding
basic pH
28
Biochemical Oxygen Demand (BOD) is a measure of
the amount of oxygen that fish need
the concentration of water contaminants
the amount of oxygen that aerobic bacteria in the water need
the amount of oxygen in the water
29
Which atom(s) on a water molecule are/is carries a partial negative charge?
neither
oxygen
both
hydrogen
30
Which of following water quality tests would best indicate amount of suspended solid matter?
Hardness
Turbidity
Salinity
Biological Oxygen Demand
31
The reason that water and oil won't mix is because
they are both nonpolar
water is polar and oil is nonpolar
water is nonpolar and oil is polar
they are both polar
32
Coral reefs recover quickly after damage
False
True
33
Which most specifically describes the relationship between aragonite and calcium carbonate?
They are both common in the Pacific ring.
They are both commonly found in fish's intestines
Aragonite is as common in the Pacific as Calcium Carbonate
They are the same
34
Which is NOT a property of water that is needed for life on Earth?
water absorbs large amounts of heat
water can't dissolve nonpolar substances
water absorbs heat during evaporation
frozen water floats on liquid water and insulates
35
What do nitrates do?
Exel plant growth
Make it smell good
Clean the water
Eat bacteria
36
Which is the strongest acid below
tomato juice - pH = 4.2
rain water - pH = 6.3
Hydrochloric acid - pH =1
sulfuric acid - pH = 1.2
37
What a dead zone?
Oxygen depleted zones caused mainly by humans
Where your phone gets no service
38
Total dissolved solids = ?
Total solids + Suspended solids
Total solids - Suspended solids
Suspended solids + Total solids
Suspended solids - Total solids
39
who is most dependent on the level of dissolved oxygen?
mammals
reptiles
fish and aquatic organisms
humans
40
Which is NOT a property of water?
cohesive
hydrogen bonding
basic pH
adhesive
41
How many hydrogen are in each water molecule?
2
3
1
4
42
Dissolved oxygen is an indicator of water health.
False
True
43
What is a safe level of dissolved oxygen?
8 mg/l
3.0 mg/l
10 mg/l
5.0 mg/l
44
What should a student add to a base to bring the solution pH down?
bleach
hand soap
vinegar
ammonia
45
What are phosphates?
The nutrients in water (made from phosphoric acid)
The speed of water in a given direction
The pollution in water
Another word for turbidity
46
Threats to ocean ecosystems are:
overfishing and entanglement of marine mammals in nets
nutrient runoff and industrial waste discharge
all of the above
sewage and algal blooms
47
Why don't oceans and lakes freeze in the winter?
solid water floats on liquid water
water molecules are adhesive and not cohesive
there aren't enough dissolved solutes in lakes
hydrogen bonding won't freeze the whole body of water
48
Salinity is....
The amount of dissolved salts in a give amount of liquid
The amount of dissolved sodium in a given amount of liquid
A small percent of water in the air
A water chemical
49
Ocean acidification means...
The oceans pH is increasing
The oceans pH is decreasing
The oceans are becoming more alkaline
The oceans are becoming less alkaline
50
What is Biochemical oxygen demand?
the amount of DO demanded by the ocean
the amount of chemicals needed for photsynthesis
the amount of oxygen needed for it to dissolve
amount of DO needed to break down organic material
51
What is a secci disk?
A tool used to measure dissolved oxygen
A tool used to measure water ph
A tool used to measure ionizing radiation
A tool used to measure turbidity
52
Can a dead zone effect humans?
Yes
No
