Q: The mercury or alcohol in a common glass what changes its volume as the temperature changes? Choices: - calculator - compass - barometer - thermometer A:
thermometer

Q: Alternative current is produced when a magnet or coil does what? Choices: - moves in circles at faster rates - moves at faster velocities - moves up and down repeatedly - moves back and forth repeatedly A:
moves back and forth repeatedly

Q: Q: Red stars are the coolest; which are the hottest? Choices: - giant - white - yellow - blue A:
A: blue

Question: Q: What element is the most common element in the universe? Choices: - carbon - helium - nitrogen - hydrogen A:
Answer: hydrogen

*Question*
Q: Most of the heat that enters the mesosphere comes from where? Choices: - Earth's surface - Exosphere - Troposphere - the stratosphere A:
**Answer**
the stratosphere

*Question*
Q: Gravitropism ensures that roots grow into the soil and that shoots grow toward what? Choices: - the north pole - trees - the south pole - sunlight A:
**Answer**
sunlight