Warm ups for week of

Monday:  EQ: Why doesn’t gas have a definite volume?  WU: According to Boyle’s Law what does it state about the relationship between gases and pressure?  1: It states that when the pressure of a gas at a constant temperature is increased, the volume of the gas decreases.  2: When the pressure is decreased, then the volume increases.  Example: A bicycle pump to air up tires.

Tuesday:  WU: How does a hot air balloon rise?  A: 1: Heat increases the volume of the air.  2: Air particles escape from the bottom opening.  3: The few air particles that remain inside the balloon are less dense than the outside air so the balloon rises.

Wednesday:  WU: What is vaporization and what are the 2 types of vaporization?  A: 1: Vaporization takes places when particles in a liquid gain enough energy to form a gas.  2: The two main types of vaporization are evaporation and boiling.

Thursday:  WU: How is air pressure and boiling point related?  A: 1: The boiling point of a substance depends on the pressure of the air above it.  2: The lower the air pressure the less energy is needed for the particles of the liquid to escape into the air.

Friday:  WU: What causes a helium balloon to burst as it rises in the atmosphere?  A: As a helium balloon rises, the outside pressure decreases which causes the helium inside the balloon to expand, which eventually stretches the balloon so much it will burst.