Joshua fills one large container with cold water Then he fills a small container with hot water and red food coloring, and seals it with a lid. Next, he puts the small container into the large container and removes the lid of the small container. He observes the red colored water from the small container rising up to the top of the cold water. Which two statements explain why this happens? (1 point)
© because the hot water has the same density as the cold water
• because the hot water is more dense than the cold water
because the hot water is less dense than the cold water
• because the hot water molecules move faster than those of cold water
because the hot water molecules move as fast as those of cold water
• because the hot water is more dense than the cold water
• because the hot water molecules move faster than those of cold water
When hot water is added to cold water. In which direction does the heat energy move? (1 point,
• No heat energy moves, as it all remains in the hot water.
• The heat energy moves from the hot water into the cold water.
• The heat energy moves from the cold water into the hot water.
• Equivalent amounts of heat energy move in both directions.
• The heat energy moves from the hot water into the cold water.
If a mixture of different gases is heated, it rises to the top of its container. Which statement best explains this result? (1 point)
• Heated gases have lower kinetic energy and higher density.
• Heated gases have lower kinetic energy and lower density.
• Heated gases have higher kinetic energy and higher density.
• Heated gases have higher kinetic energy and decreased density.
• Heated gases have higher kinetic energy and decreased density.
Four students complete the table below, ranking states of matter by potential energy. Which student is correct?
Hen- gas, liquid, solid
Jas- gas, solid, liquid
Lucas- solid, gas, liquid
Tash- solid, liquid, gas
•Jas
•Lucas
•Tash
•Hen