A scientist was studying the effects of oil contamination on ocean seaweed. He thought that oil runoff from storm drains would keep seaweed from growing normally so he decided to do an experiment. He filled two aquarium tanks of equal size with water and monitored the dissolved oxygen and temperature in each to be sure they were equal. He introduced some motor oil into one tank and then measured the growth of seaweed in each tank. In the tank with no oil, the average growth was 2.57cm. The average growth of the seaweed in the tank with oil was 2.37cm. Based on this experiment:
Can he be certain of his conclusion? How can he make his conclusion firmer?

NOT CHEM IT'S EARTH SCIENCE

An experiment is the only way that we are able to establish causation in science. In this experiment, the scientist is trying to establish the fact that oil runoff from storm drains would keep seaweed from growing normally.

From the experiment, we can see that the growth in the oil that is 2.57cm while the average growth rate for the tank in where there is oil is 2.37cm. This implies that the oi is able to affect growth.

His conclusion can be firmer is he is able to replicate the experiment over several other trials.

Learn more about experiment:https://brainly.com/question/11256472

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mohamedm5 mohamedm5 · Answer 2 · 2022-08-25T23:26:25+02:00

Answer:

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.

Explanation: