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The excerpt is from an article that Roberto read for science class called “Using the Scientific Method to Study Tomatoes.”

The student performed an experiment to test his hypothesis about sunlight and plant height using two plants. He kept everything the same between two tomato plants except he exposed them to different amounts of sunlight. He also used a third plant as a control group, or a group in which no variables are manipulated to confirm the results.
Roberto critiqued the work. Which problem did Roberto most likely identify?
The sample size is too small.
Too many variables are manipulated.
It is not possible to keep the conditions the same.
Controls should only be used in studies of animals.

Respuesta :

Rose0511

Answer:

The sample size is too small.

Explanation:

The process of elimination helped me find this answer.

It is possible to keep the conditions the same.

there are only 2 plants and one control, that's obviously not a lot.

and controls can be used on more than studying animals.

When using the scientific method you can use as many test subjects as you can so it can help you confirm. two plants are not a lot.

I've also had a teacher confirm that this is the correct answer.

edge 2020

mahima6824soni

The problem that Roberto most likely identify is the sample size is too small. The correct option is A.

What are scientific methods?

Scientific methods are a series of methods that are done to extract correct and logical results. The method includes making a hypothesis, going through the process of calculations, making a conclusion, and then the result.

Roberto is studying the growth of tomatoes under sunlight. The hypothesis is that sunlight affects the height of the tomatoes. He took plant samples, but the study took time because the plant samples were too small. So taking the right size of plants is very necessary otherwise the whole study will do in vain.

Thus, the correct option is A. The sample size is too small.

To learn more about scientific methods, refer to the link:

https://brainly.com/question/7508826

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