Topic 5: Phospates and Nitrates

Question 1

Phospates and Nitrates

Answer 1

• Naturally occurring chemicals that help plant growth
• Can be pollutants

Question 2

Persistent

Answer 2

• When a substance accumulates in an environment and has a hard time breaking down

Question 3

Non-Persistent

Answer 3

• Wastes that can be broken down easily by naturally occurring chemical reactions or bacteria

Question 4

Agal Blooms

Answer 4

• Large increase in algae population due to increased level of nutrients in water system

Question 5

Level of dissolved oxygen in water depends on:

Answer 5

1. temperature
2. turbulence due to moving wind or water
3. amount of photosynthesis by plants and algae in water
4. Number of organisms using up oxygen

Question 6

Extra

Answer 6

5ppm is best oxygen level for most organisms
4ppm is good
2ppm is poor