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.

Epinephrine is a hormone released from the adrenal gland of the body, most often in a stressful situation. it is known as the "fight-or-flight" hormone. one way that it causes a response in the body is to activate receptors on muscle cells. where are these cellular receptors located? a. on the cell membrane b. in the nucleus c. on the cell wall d. around the mitochondria

Match the description of each organism to the appropriate category

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.