Sam does an experiment in his lab. He discovers that the mass of the reactants before his experiment is the same as the mass of the products after his experiment. What did he prove?
The law of conservation of mass
The law of conservation of energy
O Physical properties only change during chemical reactions.
He messed up the experiment because the mass should have been different

Ture or false evidence for evolution includes millions of fossils

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands

In which squares should the phrase "green pods" appear a) a and d b) b and e c)a,c, and d d)a,b,c,d and e