Q: What happens when chemical bonds in a burning log break? Choices: - remove heat - hold heat - decrease heat - release heat A:
release heat

(Question)
Q: What is the term for electric current that keeps reversing direction? Choices: - direct current - AC/DC - magnetic current - alternating current A:
(Answer)
alternating current

Ques: Q: Extended stays in zero gravity are not healthy for human beings. thus, for the comfort of the astronauts, the station is rotated so that the astronauts feel there is what? Choices: - revealed gravity - still gravity - Fixed Gravity - internal gravity A:
Ans: internal gravity

(Q).
Q: What is the hypothesis that states that the biosphere is its own living organism? Choices: - Big Bang theory - Geiger theory - Pascal's hypothesis - gaia hypothesis A:
(A).
gaia hypothesis

Ques:Q: What do you call mixtures of ash and water that travel down river valleys? Choices: - debris - pollutants - mud slides - lahars A:

Ans:lahars

Ques: Q: The amount of power passed through transmission lines can be calculated by multiplying voltage by what? Choices: - resistance - amplification - induction - current A:
Ans:
current