[Q]: Two pure substances combine to make a new substance. The new substance cannot be physically separated and has a different boiling point than each of the original substances. This new substance can best be classified as
===
OPTIONS:
- an atom.
- a mixture.
- an element.
- a compound.
****
[A]: a compound.

[Q]: The interaction of the skeletal and muscular systems to produce locomotion is coordinated by which human body system?
===
OPTIONS:
- circulatory
- excretory
- nervous
- respiratory
****
[A]: nervous

[Q]: Which method could be used to separate a solution of table salt and water?
===
OPTIONS:
- mixing
- settling
- filtration
- evaporation
****
[A]:
evaporation