Four students complete the table below, ranking states of matter by potential energy. Which student is correct?
Student name Potential Energy Rating (lowest to highest)
Henry gas, liquid, solid
jasmine gas, solid, liquid
lucas solid, gas, liquid
tasha solid, liquid, gas
(1 point)
Responses
Henry
Lucas
Jasmine
Tasha
The correct student is Tasha, who ranked the states of matter by their potential energy as solid, liquid, gas.
Jasmine adds varying amounts of ice to samples of water. Which conclusion can she draw from her experiment?(1 point)
Responses
As water temperature decreases, the water molecules’ kinetic energy increases.
As water temperature increases, the water molecules’ kinetic energy decreases.
As ice added decreases, the water temperature decreases.
As ice added increases, the change in water temperature increases.
Jasmine can conclude that as ice is added to the water, the water temperature decreases. Therefore, the correct conclusion from her experiment is: "As ice added increases, the change in water temperature decreases."
A student puts different numbers of ice cubes into four separate containers of water. She calculates the change in temperature in each container after half an hour. In this experiment, what is the independent variable?(1 point)
Responses
Number of ice cubes added
Time elapsed
Initial water temperature
Final water temperature
The independent variable in this experiment is the number of ice cubes added.
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)
Responses
A. because the hot water molecules move as fast as those of cold water
B. because the hot water has the same density as the cold water
C. because the hot water molecules move faster than those of cold water
D. because the hot water is more dense than the cold water
E. because the hot water is less dense than the cold water
The two statements that explain why the red colored water rises to the top of the cold water are:
C. because the hot water molecules move faster than those of cold water
E. because the hot water is less dense than the cold water
When hot water is added to cold water. In which direction does the heat energy move?(1 point)
Responses
A. No heat energy moves, as it all remains in the hot water.
B. Equivalent amounts of heat energy move in both directions.
C. The heat energy moves from the hot water into the cold water.
D. The heat energy moves from the cold water into the hot water.
The correct answer is:
C. 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?
Responses
A. Heated gases have lower kinetic energy and higher density.
B. Heated gases have higher kinetic energy and higher density.
C. Heated gases have higher kinetic energy and decreased density.
D. Heated gases have lower kinetic energy and lower density.