Q: What process is at work when warm air or water rises, and cool air or water sinks? Choices: - evaporation - radiation - moisture - convection A:
convection

(Question)
Q: Magnetite crystals of different ages and on different continents pointed to different spots. the simplest explanation is that the continents have done what? Choices: - reacted - changed - evolved - moved A:
(Answer)
moved

Ques: Q: Small crustaceans exchange gases across thin areas of the cuticle; larger species have what to accomplish this? Choices: - noses - pores - lungs - gills A:
Ans: gills

(Q).
Q: Two important types of waves include longitudinal waves and what other kind? Choices: - phenomena - slow - irregular - transverse A:
(A).
transverse

Ques:Q: The timing of events in what cycle - which lasts just minutes in fruit fly embryos - is controlled by mechanisms that are both internal and external to the cell? Choices: - circadian cycle - carbon cycle - life cycle - cell cycle A:

Ans:cell cycle

Ques: Q: What is the approximate population on the earth? Choices: - 9 trillion - 7.3 billion - 41 billion - 7 billion A:
Ans:
7 billion