Students in sixth grade science spent several weeks studying conservation and recycling Students then investigated how different

Question

Students in sixth grade science spent several weeks studying conservation and recycling Students then investigated how different recycled products affected plant growth The second period class compared the effect of different aged grass compost on the height of bean plants Because the decomposition that occurs during composting is needed to release the nutrients in the grass this class predicted that older grass compost would produce taller bean plants Three flats of bean plants 25 plants in each flat were grown for 30 days All of the bean plants had been planted 10 days before the start of the investigation Flat 1 received 450g of 3 month old compost Flat 2 received 450g of 6 month old compost Flat 3 received no compost All of the bean plants received the same amount of water and sunlight each day At the end of 30 days all of the bean plants were measured in cm and the data recorded Independent variable Dependent variable Control group Age of th 30 days Choose

Kunduz · Accepted Answer

Click to see the answer