Q: Q: What is defined as superheated gas with a positive electrical charge? A:

OPTIONS:
- supernova
- greenhouse gas
- ion
- plasma

A: plasma

Q: Q: The dna is wound around proteins called what? A:

OPTIONS:
- leptons
- nucleotides
- pepsins
- histones

A: histones

Q: Q: In science, what is constantly tested, sometimes revised, sometimes thrown out and sometimes well-established? A:

OPTIONS:
- a technique
- a study
- a variable
- a theory

A: a theory

Q: Q: What is the name of the line used in topographic maps that shows different elevations? A:

OPTIONS:
- a patch line
- a crater line
- a curve line
- a contour line

A:
a contour line