WorksheetsOcean Chemistry Quiz Review
Total questions: 20
Worksheet time: 15mins
As the depth of the ocean increases, the amount of dissolved oxygen
increases only
decreases only
increases then decreases slightly
decreases then increases slightly
A sponge has a mass of 4 grams and a volume of 3mL. What type of buoyancy will the sponge have?
Positive
Neutral
Negative
The higher the temperature, the more dissolved oxygen in water.
True
False
All of the following add Dissolved Oxygen to the water except....
From Photosynthesis by underwater plants
Movement of the water
Air in the atmosphere
Underground Oxygen deposits
Why does the amount of dissolved oxygen increase during the day?
The sunlight allows photosynthesis to occur
The warmer temperatures allow the water to hold more oxygen
The fish are more active so they are respiring more
What can REMOVE dissolved oxygen from the water?
cellular respiration
decomposition
warming waters
All of the above
How does low Dissolved Oxygen levels affect organisms?
Organisms may die or have to leave if levels get too low
Organisms go through more cellular respiration
Organisms eat more
Decreasing ocean temperature causes the density of the water to ______.
decrease
increase
stay the same
fluctuate
Oxygen is able to reach the deep ocean floor because...
Cold water is denser and carries oxygen down as it sinks
Warm water is denser and carries oxygen down as it sinks
Oxygen is a heavy atom and sinks on its own to the ocean floor
All organisms must swim to the surface to breathe oxygen
Why is dissolved oxygen necessary for marine organisms?
Marine organisms need oxygen to float
marine organisms need oxygen for cellular respiration (making energy)
Marine organisms need oxygen to maintain osmotic pressure
All of the above are true
Which ocean layer has the highest temperature and most dissolved oxygen?
Surface layer
Thermocline layer
Deep ocean layer
As depth increases temperature
decreases
increases
stays the same
Why do ships release ballast water when going from saltwater to freshwater
because they need to maintain the same mass in freshwater and saltwater
because the freshwater is more dense than the salt water and they want to decrease their mass
because freshwater is less dense than saltwater and they want to decrease their mass
Marine systems attempt to maintain ______of dissolved oxygen
100% saturation
desaturation
super saturation
hypoxia
Which layer shows the most dramatic drop in temperature?
Surface layer
Thermocline layer
Deep ocean layer
What is the MAIN cause of the drop in dissolved oxygen as the depth increases?
the sun decreasing sunlight as depth increases
the lack of photosynthetic organisms in thermocline and deep ocean layers
the lack of photosynthesis due to decreased sunlight
All of the above are correct
Jellyfish has a mass of 2 grams and occupies a volume of 2mL. What is the density of the jellyfish? CHECK ALL THAT ARE CORRECT
1g/mL
1 g/cc
1 g/ cm3
0.1 g/mL
4 g/mL
It is easier to float in salt water than freshwater because saltwater is more dense than freshwater.
True
False
Which order shows ocean layers from most shallow to deepest?
Upper mixed layer → Main Thermocline → Deep Bottom Water
Upper mixed layer → Deep Bottom Water → Main Thermocline
Deep Bottom Water → Main Thermocline → Upper mixed layer
Main Thermocline → Deep Bottom Water → Upper mixed layer
