J.2 Self Checks 1 & 2

If a cup of milk spills on the counter the milk will...

• change shape

• keep its shape

The _________ of the spilled mil is the same as the __________ of the mil that was in the glass before it spilled.

• shape

• volume

When you spill milk why does the milk flow out of the glass and spread out into a thin puddle rather than staying in the glass or spreading out more across the floor?

• The particles can break apart but cannot move.

• The particles can slide past each other, but attractions hold them close together.

• The particles cannot move, but they can grow in size.

How can the volume of gas in baloons be greater than the volume of the cylinder used to fill them?

• A gas has a fixed shape.

• A gas expands to fill its container.

• The volume of the container does not depend on the gas.

How can the properties of the particles in a gas explain why the volume of the balloons is greater than the volume of the container?

• The gas particles are bigger in the balloon.

• The distance between the gas particles is greater in the balloons

• The gas particles are locked in place in the cylinder, but can move in any direction inside the balloon.

If the gas cylinder is empty after all of the balloons are filled, how does the total number of particles in all the balloons compare to the total number of particles that were in the cylinder?

• There are more particles in the balloons than were in the cylinder.

• There are fewer particles in the balloons than were in the cylinder.

• The number of particles in the balloons is the same as the number of particles that was in the cylinder.

A student drew a model showing particles that are close together in a regular pattern. Which sample has the student most likely drawn a model of>

• a bar of gold

• an air sample

• molten aluminum

• bromine gas

Sweating is one way the body cools itself. Choose the statement that best explains this cooling process.

• water condenses on the skin, adding thermal energy to the body.

• Moisture from the body evaporates from the skin, removing thermal energy from the body.

Which process is similar to the process of sweating?

• Water droplets form on the outside of a glass of ice water.

• Wet clothes hanging on a clothes line.

• A hot, moist towel placed on sore muscles to soothe them.

Which weather conditions would most likely create a heave fog.

• Rapid cooling air that is low in water vapor.

• Rapid cooling air that is high in water vapor.

• Rapid warming air that is low in water vapor.

• Rapid warming air that is high in water vapor.