*Question*
Q: What are electromagnetic waves created by? Choices: - Static Charges - gravitational charges - particle charges - oscillating charges A:
**Answer**
oscillating charges

*Question*
Q: Hfcs are used as a replacement for what? Choices: - nitrofluorocarbons - pollutants - gases - cfcs A:
**Answer**
cfcs

*Question*
Q: What is the clear, curved structure that works with the cornea to help focus light at the back of the eye? Choices: - pupil - retina - iris - lens A:
**Answer**
lens

*Question*
Q: Partial albinism results from a mutation in an enzyme that is involved in the production of what? Choices: - cytoplasm - hair - cancer - melanin A:
**Answer**
melanin