ACT Science 2.2 Research Summary Passage
ACT Science: Research Summary Passage Drill 2, Problem 2. Why is the filter paper effective at removing sand from the water?
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Basically, we want to figure out why filter paper works for separating sand from water.
As long as we can keep it from getting in between our toes.
We can get rid of option D, because filter paper is effective at removing sand from water.
Sand particles are too big to pass through the filter paper.
We can cross off option A, too.
We don't even have to read any of the passage to know that one's wrong.
If water molecules were bigger than sand molecules,
why would the water molecules have the ability to pass, but not the smaller sand bits?
It'd be like saying a basketball can fit in the trashcan, but a golf ball can't.
Doesn't make sense.
Anybody who's been to the beach should be able to pick
the right answer from among the last two options.
If not, then we suggest a well-deserved vacation to Southern California... after the test, of course.
Those who are beach aficionados will know that sand somehow gets everywhere...
and sticks to everything... including paper.
Sand most certainly will stick to the filter, so we can get rid of B.
And that leaves us with C... which is the correct answer.
Looks like going to the beach does pay off on test day.