required practicals

Question 1

bacterial growth rp
how to measure kill zone

Answer 1

1.sterlise inoculating loop
2,open agar petri dish
3.innoculating loop to spread bacteria
4.paper discs that have antibiotics
5.incubate at 25
using area

Question 2

photosynthesis rp two methods

Answer 2

1. boiling tube 10 cm away from a led light source
   2.fill it sodium hydrogen carbonate solution
   3.pondweed in boiling tube cut end at the top
   4.leave to acclimatise for 5 mins
2. count bubbles in a minute
   6 .repeat again to find mean
   5.again at each cm point

or
catch bubbles with measuring cylinder and funnel filled with water

Question 3

reaction time rp

Answer 3

person 1 sits down with there dominant arm with there thumb at 0 person 2 holds ruler vertically tells no1 to prepare

Question 4

light on growth rate

Answer 4

1.cotton wool in three petri dishes and soak them with equal amount of water
2.ten seeds
3.leave seeds in warm place to germinate
4.meause height of each seedling
5.place in different conditions
6.record height everyday