practical information

Question 1

How do you measure uncertainty?

Answer 1

It is the difference between the highest and lowest result divided by 2

Question 2

How do you calculate the ratio of half life of an element between 2 dates.

Answer 2

Eg If the half life of an element is 50 years the ratio between 100 and 350 years is (1/2) to the power 5 because there are 5 x 50 years between the two dates.

Question 3

Important points when answering

How to set up experiment questions…

Answer 3

1. Add detail including equipment eg measure weight using a pan scale
2. Ensure you include any control variables eg when planning an experiment including water ensure that the start temp and or volume is always the same
3. Always explain how you would collect and display any data, including graphical methods.
4. Include any formula that you would need to use to calculate results

Remember the method needs to produce a valid outcome and be in a logical order to get full marks so plan it!