Question

Two students performed the same experiment, testing how far iodine will diffuse through starchy tissue, such as potatoes. They cut 5 potato squares each, all of equal sizes, and placed them into small cups with iodine solution for 15 minutes. Then they measured how far from the edge of the potato the iodine diffused into the potatoes, in millimeters.
Distance Diffused (mm)
Trial 1 Trial 2 Trial 3 Trial 4 Trial 5
Student 1 3.25 3.17 3.26 3.64 3.44
Student 2 3.14 3.43 3.22 3.37 3.28

1. What is the range of student 1's results?
a. 3.35
b. 0 29
c. 0 47
d. 3 29

2. Why do scientists conduct experiments?
a. To test their results.
b. To test a hypothesis.
c. To test a conclusion.
d. To explain an observation.

Answer 1

Answer:

Option c

Option b

Explanation:

To calculate range: range is highest data value - lowest data value

where the highest value in student 1's result is 3.64 and the lowest value is 3.17

Thus, the range of student 1's result is

3.64 - 3.17 = 0.47

Scientists conduct experiments to test a hypothesis. For a scientific research, the researcher first form hypotheses on a particular question she wants answered or maybe she is curious about something. An experiment is then carried out to further test the validity of the hypothesis so as to be able to make a conclusion.