Dissolved Oxygen

The higher the temperature, the more dissolved oxygen in water.

• True

• False

Which of these can do photosynthesis?

• Algae

• Seaweed

• Trees

• All of the above

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

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

Tags

NGSS.MS-LS1-6

How do bacteria affect Dissolved Oxygen (DO) in water bodies?

• increase DO through decomposition

• decrease DO through decomposition

• DO stays the same

• bacteria multiply DO by 8

Tags

NGSS.MS-LS2-4

Colder water.....

• hold MORE dissolved oxygen

• holds LESS dissolved oxygen

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

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What can add dissolved oxygen to the water?

• Photosynthesis

• Wave and Wind Action

• Diffusion from the air above

• All of the above

Tags

NGSS.MS-LS1-6

What can REMOVE dissolved oxygen from the water?

• cellular respiration

• decomposition

• warming waters

• All of the above

Tags

NGSS.MS-LS2-3

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

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Algae blooms will ____________ the amount of dissolved oxygen in an aquatic system.

• Decrease

• Increase

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3