Question

PLEASE HELP!!!! 15 point!!!!!

Scientist tested the effect of a fertilizer on the growth of plants. They had two sets of plants Group A which gets fertilizer water & and Group B which gets only water and sun (but equal amounts to Group A)

1. Explain how this scenario is a controlled experiment and identify the manipulated variable?

2. If the scientist only performed one experiment but it supported their hypothesis why can it not be considered a theory?

Answer 1

2_ it doesn't because scientist have to do multiple tests and they have to get the same results

1_i don't know for sure

Answer 2

ANSWER 1: The manipulated variable is the fertilizer since the other factors (water and sunlight) are given in equal amounts. It is a controlled experiment because one group receives fertilizer while the other does not. Any differences in growth should be due to either having fertilizer or not.

ANSWER 2: In order for it to be a theory, it has to be tested numerous times by multiple scientists.

Hope it helps. God bless