Maria wondered if different colors of plastic wrap affected the time for bread to mold. She wrapped a slice of bread in clear plastic wrap. Before wrapping the bread she placed 5ml of water in the center of

the bread. She repeated the process with a slice of bread using red plastic wrap & a slice of bread using

blue plastic wrap. The bread came from the center of the same loaf. In each case she used the same

amount of water and the same brand of plastic wrap. She wrapped the different slices of bread in the

same way.

Independent variable:

I

Dependent variable:

Control:

Explanation:

An independent variable can be described as the variable that is intentionally altered during the experiment by the researcher and is not affected by any other variable involved in the course of the experiment. From this description, the independent variable in the question are the "plastic wraps".

A dependent variable can be described as the variable that is been experimented on or has the tendency to be affected by the independent variable. From this description, the dependent variable here is the "time" it will take for the bread to mold.

The control of an experiment can be described as the "normal" or the "standard" experiment in which other experiments in the same research of the same nature are compared with. From this description, the control of this experiment is the experiment done involving the clear plastic wrap.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c