Question

Can Someone Help Me!! With 2 Questions ONLY?

Will Receive A MEDAL!
I will FAN!!!! YOU......

Answer 1

Q#1: You notice green scum floating on the surface of a pond. How can you tell whether these organisms are plants?

Answer 2

Q#2: Explain, using an example how water may become polluted

Answer 3

PLEASE PLEASE PLEASE ........

Answer 4

Examine the scum. Touch it, what texture does it have? Does it move away from your hand when it touches the water? If it is algae, it should feel slimy and spongy. It shouldn't move away from your hand, instead it should wrap around your fingers and hand. Also, plants chloroplasts are green which can be another indicator that it is a plant. Look at it then try and find pictures of algae that might look the similar. If you find a picture that looks the same and it IS an algae, then the scum is a plant.

Answer 5

Thx

Answer 6

2.
The specific contaminants leading to pollution in water include a wide spectrum of chemicals, pathogens, and physical or sensory changes such as elevated temperature and discoloration. While many of the chemicals and substances that are regulated may be naturally occurring (calcium, sodium, iron, manganese, etc.) the concentration is often the key in determining what is a natural component of water, and what is a contaminant. High concentrations of naturally occurring substances can have negative impacts on aquatic flora and fauna.
Oxygen-depleting substances may be natural materials, such as plant matter (e.g. leaves and grass) as well as man-made chemicals. Other natural and anthropogenic substances may cause turbidity (cloudiness) which blocks light and disrupts plant growth, and clogs the gills of some fish species.
Many of the chemical substances are toxic. Pathogens can produce waterborne diseases in either human or animal hosts. Alteration of water's physical chemistry includes acidity (change in pH), electrical conductivity, temperature, and eutrophication. Eutrophication is an increase in the concentration of chemical nutrients in an ecosystem to an extent that increases in the primary productivity of the ecosystem. Depending on the degree of eutrophication, subsequent negative environmental effects such as anoxia (oxygen depletion) and severe reductions in water quality may occur, affecting fish and other animal populations.

Answer 7

Ok, Thx so much

Answer 8

np and btw, this is the physics section. you should've asked this question in the biology section

Answer 9

I know...