On a warm summer day, a group of friends went swimming at the pool. They experienced hot, humid air at noon; but a few hours later the temperature dropped,
and a thunderstorm occurred. Which explanation below BEST describes what
caused this event?

the law of original horizontality explains:   why rocks appear in layers. correct answer: b the law suggests that all rock layers are originally laid down (deposited) horizontally and can later be deformed.   the principle is used by geologists to make assumptions about the relative ages of sedimentary rocks.

1) a

2)c

3)a

4)c

5)b

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for a different answer set the answer would be because the oxygen in the water had depleted (apex)