Investigate the factors affecting germination

Question 1

Briefly outline a method to investigate the factors affecting germination

Answer 1

1) Put cotton wool in 5 petri dishes
2) Fill up petri dishes with 0, 5, 10, 15, 20, 25 ml3 of distilled water, using a measuring cylinder
3) Place 10 cress seeds in each petri dish
4) Replace lid and put on window sill
5) Monitor for 4 days and refill water
6) Measure shoot length and record in a table

Question 2

What is a potential hazard?

Answer 2

Swallowing a cress seed if allergic

Question 3

What is the dependent variable?

Answer 3

Shoot length / number of seeds germinated

Question 4

What is the independent variable?

Answer 4

Volume of water

Question 5

What are control variables?

Answer 5

Same light intensity
Same pH (distilled water)
Number of seeds
Same temperature
Same hormone levels