A researcher is studying the effects of negative outcomes on the human brain in a psychological experiment. The researcher shows ten participants various pictures and designs. When the participants see a red star, they are immediately given a brief, painful shock and their brainwaves are analyzed. A different group of ten participants is given the same pictures and designs but are given no shock when they see the red star. What was the control in the experiment?

What can be added to the examples section of each circle? endothermic: ice melting into water, and a heat pack becoming warm exothermic: a glow stick glowing, and fireworks exploding endothermic: ice melting into water, and an instant ice pack turning cold exothermic: fireworks exploding, and gasoline burning endothermic: a glow stick glowing, and a heat pack becoming warm exothermic: an instant ice pack turning cold, and ice melting into water endothermic: gasoline burning, and an instant ice pack turning cold exothermic: ice melting into water, and an instant ice pack turning cold

How do scientists think that gravity affected the formation of our solar system?

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?