Question

A scientist was studying the effects of oil contamination on ocean seaweed. He believed that oil runoff from storm drains would keep seaweed from growing normally. He had two large aquarium tanks of equal size. He kept the amount of dissolved oxygen and the water temperature the same in each tank. He added some motor oil to one tank but not to the other. He then measured the growth of seaweed plants in each tank. In the tank with no oil, the average growth was 2.57cm/day. The average growth of the seaweed in the tank with oil was 2.37cm/day. Based on this experiment, answer the following questions:

What was the question that the scientist started with?
What was his hypothesis?
Identify the independent variable.
Identify the dependent variable.
Identify the control(s).
What did the data show

Answer 1

Answer:

What was the question that the scientist started with?

What affect does oil contamination have on ocean seaweed?

What was his hypothesis?

His hypothesis is that oil run off would keep seaweed from growing normally.

Identify the independent variable.

The oil.

Identify the dependent variable.

The ocean seaweed.

Identify the control(s).

The water.

What did the data show

The data showed that oil contamination in water does in fact have an affect on ocean seaweed. The plant in water without water grew .20 more centimeters than the plant in the oil contaminated water.

Brainliest please?

Answer 2

Question:

Does ocean contamination with oil can negatively effects the growth of ocean seaweed?

Hypothesis:

According to his believe the hypothesis should be:  Oil runoff is effective in increasing the growth of seaweed.  

Independent variable:

Independent variable is the variable which can be changed in an experiment. Here, the independent variable is the oil whose effect is to be observed on the growth of seaweed.

Dependent variable:

The dependent variable is the outcome of the experiment it changes with the effect of the independent variable. Here, the dependent variable is growth of the seaweed with the effect of oil.

Control(s):

Control is a specimen in the experiment which is kept as a benchmark for comparison and no experiment is done on it.

Here, the tank in which only water was used to observe the growth of seaweed is the control.

Data:

The data shows that the oil is not responsible for enhancing the growth of seaweed instead the tank with only water content was helpful for raising the plants with greater growth as on the other one having water and motor oil both.

Hence, it can be stated that the scientist hypothesis is false and the oil runoff can inhibit the growth of the seaweed rather than increasing its growth.

Learn more about independent variable:

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