General skills Flashcards
1
Q
EQ. Describe an investigation to find out the most suitable amount of calcium ion needed to get the best growth results in rats. (6 marks)
A
- different amounts of calcium ions
- use same species of rats
- repeat with several rats
- measure the mass of the rats
- take measurements for 1 day
- make sure rats have the same diet
- and that they are kept in the same temperature
2
Q
EQ. Describe an investigation to find out if the length of time that plants are exposed to light affects how long it takes fro flowers to appear. (6 marks)
A
- the plants will be exposed to lights for different lengths of time
- will use same species of plant
- repeat with several plants
- measure time for flowers to appear
- take measurements for 1 week
- make sure plants recieve same amount of water
- they are the same temperature
3
Q
What’s the formula for percentage change %
A
(new-old)÷old x100
4
Q
What’s the formula for magnification
A
image size÷actual size
5
Q
How to convert from mm to µm
A
x1000
