Biol4 - HSW Questions

Question 0

How to make more reliable and accurate (2)

Answer 0

~more reliable repeat many times

~more accurate, use equipment with smaller interval in measurement e.g. Scale to 0.01 mg instead of to 0.1 mg

Question 1

Define accuracy and reliability (2)

Answer 1

~reliable means figure can be reproduced when measurement repeated
~accuracy means without error/ free from mistakes

Question 2

How to show if theres a correlation between X and Y (3)

Answer 2

~plot X against Y on a graph
~draw line of best fit
~see if gradient of this line is close to +1 or -1?

Question 3

Advantage of taking measurement of a length over a volume (1)

Answer 3

~length can be measured with a single measurement/is a linear measurement/less prone to error

Question 4

Describe two ways in which am earlier scientific paper on same subject might help scientists to carry out their work and produce a more reliable report? (2)

Answer 4

~scientists could use method established earlier (thus saving time)
~finding more reliable if they replicate the findings of others

Question 5

How to calculate percentage increase from…

Answer 5

Value increased from

x 100

Question 6

• Compare to*

* provides a standard/benchmark*

Answer 6

• Compare to*

* provides a standard/benchmark*