It's time to make the ice pieces. For ice piece 1, place 2 teaspoons of water into one of the spaces in the ice cube tray. To make ice piece 2. place 2 teaspoons of water into the sealable plastic bag. Carefully squeeze
as much of the air out of the bag as possible without spilling any water. Then seal the bag. Place the
sealed bag on a flat surface in the freezer. Place the ice cube tray in the freezer at the same time. Leave
both in the freezer for four hours. Record the start time and the time when you can remove the ice.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light