Can someone please give me a testable question for Oxygen. I cant think of one for the life of me.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

Abar magnet cut in half will form a total ofpoles. a)fourb)eightc)two

What are the north and south poles of a solenoid change with?