Q: Photographs of the heat emitted by an object are called what? Choices: - radio images - variable images - cosmic images - thermal images A:
thermal images

Q: Hiv is a retrovirus, which means it reverse transcribes its rna genome into what? Choices: - atp - ribosomes - amino acid chains - dna A:
dna

Q: Q: What topographic feature does a circle with inward hatches represent on a contour map? Choices: - a lake - vegetation - a mountain - a depression A:
A: a depression

Question: Q: What do molecules need to do for a reaction to take place? Choices: - explode - melt - separate - collide A:
Answer: collide

*Question*
Q: What do all sound waves begin with? Choices: - oscillating matter - talking matter - enclosing matter - vibrating matter A:
**Answer**
vibrating matter

(Q).
Q: What word describes a molecule that repels polar water? Choices: - monophobic - hydrophonic - soluble - hydrophobic A:
(A).
hydrophobic