A mixture of gases is heated and rises to the top of its container. Which statement best explains this result?

A. Heated gases will have increased kinetic energy and increased density.

B. Heated gases will have increased kinetic energy and decreased density

C. Heated gases will have decreased kinetic energy and decreased density

D. Heated gases will have decreased kinetic energy and increased density.

The answers for schoology are.

Which statement best describes what will happen as the door opens between the two rooms?
Answer: The temperature in both rooms will become equal over time.

A mixture of gases is heated and rises to the top of its container. Which statement best explains this result?
Answer: Heated gases will have increased kinetic energy and decreased density.

When initially set up, in which direction does the thermal energy between the flasks flow?
Answer: Thermal energy flows from the flask on the left to the flask on the right.

A few minutes later, she notices the cup and the spoon have gotten hot. What made Priya's cup and spoon get hot?
Answer: Heat was conducted to the cup and spoon when the hot water molecules collided frequently with the cooler molecules in the cup and spoon and transferred heat.

Which of the following types of energy transfers can take place when matter is not present?
Answer: Radiation