*Question*: Earthquake waves are recorded by seismograph machines. What does an earthquake wave transmit? OPTIONS:
- energy
- light
- particles
- speed
*Answer*: energy

*Question*: Sound will not travel in a OPTIONS:
- solid
- liquid
- gas
- vacuum
*Answer*: vacuum

*Question*: The elements sulfur (S) and oxygen (O2) combine to form a substance called sulfur dioxide (SO2). Sulfur dioxide is also formed when coal and oil are burned. Sulfur dioxide can best be described as OPTIONS:
- a metal
- an atom
- a compound
- a nonreactive gas
*Answer*:
a compound