Question

A DECREASE in the density of a sample of a gas inside a balloon could be caused by A) putting the balloon in the refrigerator. B) taking the balloon outside on a hot day. C) shaping the balloon into the shape of a dog. D) taking the balloon down to the bottom of the ocean.

Answer 1

B) taking the balloon outside on a hot day.

Step-by-step explanation:

Answer 2

B

Step-by-step explanation:

When a mass of air is heated it becomes less dense. This is why a hot air balloon rises in the atmosphere. It is also the same reason why hot air rises and the moisture in it condenses to form clouds. The cooler less dense air mass moves downards (in some convection currents fashion) in to replace the hot rising air.