Q: What is a winding ridge of sand deposited by a stream of meltwater called? Choices: - sand dune - desert - oasis - esker A:
esker

(Question)
Q: What has increased in the atmosphere throughout the history of the earth? Choices: - nitrogen - wind - carbon - oxygen A:
(Answer)
oxygen

Ques: Q: What is required for a decay chain to end? Choices: - stable half-life - unstable end-product - radioactive cascade - stable end-product A:
Ans: stable end-product

(Q).
Q: Light reactions occur during which stage of photosynthesis? Choices: - intermediate stage - third stage - final stage - first stage A:
(A).
first stage

Ques:Q: What type of electricity is formed when a negative charge builds up and are transferred? Choices: - neutron energy - alternating current - direct current - static electricity A:

Ans:static electricity

Ques: Q: Specific scents are often associated with what? Choices: - pheromones - behaviors - instincts - memories A:
Ans:
memories