Hey anotherworld2b
This response was much better than before, all the information was there and it was much more coherent than the last one.
The response itself, however may be too long depending on the marks being allocated, so I think it may be beneficial to answer a question similar to this one but for less marks to work on making the answer more susinct but still coherent with the same amount of information.
Hope this helps
Skidous
Thank you for your help
I was wondering for this question could I get feedback on whether I am answering it correctly please
* Chapter 2 - Question 2
American Dr William Bean studied the growth of his fingernails for 35 years. He filed a horizontal line on his thumbnail just above the cuticle (the strip of skin at the base of the nail). By recording recording how long it took the mark to reach the tip of the thumbnail he was able to calculate the growth rate. He was eventually able to conclude:
‘A 35-year observation of the growth of my nails indicates the slowing of growth with increasing age. The average daily growth of the left thumbnail, for instance, has varied from 0.123mm a day during the first part of the study when I was 32 years of age to 1.1.95mm a day at the age of 67.’
Suggest a hypothesis that Dr Bean was testing
An increase in age will decrease the rate of the growth of nails
Which was the independent variable and which was the dependant variable in this investigation?
Independent variable: age
Dependent variable: the growth of nails
List some of the variables that should have been controlled in Dr Bean’s study
-the size of the horizontal line each day he puts it on his thumbnail
-when he places the horizontal line
-where he places the horizontal line
Describe one source of random error in the investigation
An error in the accuracy of the measurement of the growth of the nail due to the measurement being calculated in millimeters,
Measure the length of your thumbnail. Assume that your thumbnail grows at the same rate as that of the 32-year-old Dr Bean. How long did it take the tip of your thumbnail to grow from the cuticle to its present position?
My nail: 12 mm. Dr Bean’s nail’s growth : 0.123mm.
12/ 1.123 = 97.56 so approximately 98 days
Do you think your fingernails and toenails grow at the same rate? Propose a hypothesis and outline an investigation that you could do to test your hypothesis
I do not think that fingernails and toenails grow at the same rate. I believe that fingernails grow at a faster rate than toenails.
Hypothesis: Over time fingernails will grow at a faster rate than toenails.
Method:
File a horizontal line on his thumbnail just above the cuticle (the strip of skin at the the base of the nail)
Measure the growth of each thumbnail and toenail everyday and record measurement
Record how long it took the mark to reach the tip of the thumbnail
Calculate the growth rate
Repeat step 2-4 over a duration for 4 months