A student boils 100 grams of water to form water vapor (gas). What method should the student use to determine that the mass of the water vapor is equal to 100 grams? OPTIONS:
- measuring the amount of water vapor (gas) in the air
- collecting the water vapor (gas) and cooling it back to a liquid
- weighing the beaker before and after the water is boiled
- comparing the temperature of the boiling water to the temperature of the water vapor (gas)
A: collecting the water vapor (gas) and cooling it back to a liquid

John was using his mp3 player when it suddenly stopped working. What is the first thing John should do to try correcting the problem? OPTIONS:
- recharge the battery
- take the player apart
- replace the player with a new one
- change to a different song
A: recharge the battery

Which statement best explains why the Sun and the Moon appear to be about the same size in the sky? OPTIONS:
- The Sun and the Moon have the same diameter.
- The Moon is larger in diameter and farther from Earth than the Sun.
- The Moon is smaller in diameter and is closer to Earth than the Sun.
- The Sun and the Moon are the same distance from Earth.
A: The Moon is smaller in diameter and is closer to Earth than the Sun.

John was using his mp3 player when it suddenly stopped working. What is the first thing John should do to try correcting the problem? OPTIONS:
- recharge the battery
- take the player apart
- replace the player with a new one
- change to a different song
A:
recharge the battery