To investigate the effect of acid rain on the growth of cress seeds - ACTIVITY OF CLASS 8

In the activity students took four petridishes, in each petridish they first place some cotton. After they moisten the cotton with some water. They place sprinkle 20 cress seeds in each petridish .Then in
PETRIDISH A - They put 10 drops of water
PETRIDISH B- They put 10 drops of citric acid (present in lemon)
PETRIDISH C- They put 5 drops of water + 5 drops of citric acid
PETRIDISH D- They put 1 drop acid + 9 drops of water
After 1 week they will observe in which petridish the plant growth is affected