Luciana notices that the air in her science
classroom is much warmer than the air in
her math classroom. Which describes how
the air particles are different in her colder
math classroom?
(A) They move faster on average.
B They are vibrating.
© They have less average energy.
D They move more freely.

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?