Q: Q: What can help scientist gather information for an investigation? A:

OPTIONS:
- variables
- controls
- conclusions
- observations

A: observations

input: OPTIONS:
- cognitive rhythm
- auditory rhythm
- life cycle
- circadian rhythm Now, answer this question: Q: What are regular changes in biology or behavior that occur in a 24 hour cycle? A:
A:
output: circadian rhythm

Q: There are two types of digestion, mechanical and what else? A:

OPTIONS:
- radiation
- mineral
- thermal
- chemical

Answer: chemical

Problem: OPTIONS:
- revolution
- ellipse
- nucleus
- orbit
Q: Q: All planets exhibit the same or nearly the same direction and shape of what path around the sun? A:
Answer: orbit

Problem:OPTIONS:
- dermis
- callus
- cartilage
- epidermis

Q: A hair grows out of a follicle and passes through what before extending above the skin surface? A:
****
A: epidermis

Problem:OPTIONS:
- animal chemistry
- inorganic chemistry
- nuclear chemistry
- organic chemistry

Q: Strong, stable bonds between carbon atoms produce complex molecules containing chains, branches, and rings; the chemistry of these compounds is called what? A:
****
A:
organic chemistry