Help me in my last question please

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give