Now open this video of a man sliding across the ice. The screen shows a data table, a position against time graph, and a velocity against time graph. Click the play button, and watch the video. Then study the position against time graph. What is the change in the motion of the man? How do you know? Is the acceleration of the man positive or negative?

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.

Choose all the answers that apply. our solar system: is in a spiral galaxy no longer includes pluto is made mostly of empty space is in the andromeda galaxy is the only known system that supports life

Which of the following are guidelines to follow for obtaining accurate observations