Q: Concentric circles that spread out through the water around the droplets are actually types of what moving through the water? Choices: - winds - troughs - lines - waves A:
waves

(Question)
Q: What dangerous oxygen compound is found in ground level smog? Choices: - argon - sulfur dioxide - neon - ozone A:
(Answer)
ozone

Ques: Q: Which process causes rocks at the earth's surface to change form? Choices: - bleaching - remodeling - eroding - weathering A:
Ans: weathering

(Q).
Q: What type of weathering causes the minerals in a rock to change? Choices: - toxic - natural - artificial - chemical A:
(A).
chemical

Ques:Q: What are scientists able to determine about stars using emission and absorption spectra? Choices: - shape - size - distance - composition A:

Ans:composition

Ques:Q: A single, often oversimplified, path through which energy and matter flow through an ecosystem is also known as what? Choices: - the chain - fuel chain - life cycle - food chain A:

Ans:
food chain