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Playlist ACT® Science Research Summary Passage 26 videos
ACT Science: Research Summary Passage Drill 1, Problem 1. What is the method used by the scientists in this experiment?
ACT Science: Research Summary Passage Drill 1, Problem 2. Which of the following is not a chemical represented in a peak in Figure A?
ACT Science: Research Summary Passage Drill 1, Problem 3. What is the time course of the experiment?
ACT Science 2.5 Research Summary Passage 192 Views
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Description:
ACT Science: Research Summary Passage Drill 2, Problem 5. What do you think the student did wrong?
Transcript
- 00:03
Try this shmoop on for size...
- 00:05
Why not conduct a little experiment of your own...
- 00:07
and hit pause so you can review the following passage.
- 00:16
One of the students ended up with the salt and sand together in the distillation chamber.
- 00:20
What do you think the student did wrong?
Full Transcript
- 00:23
And here are the potential answers...
- 00:28
So what's this question asking?
- 00:29
Looks like a critical thinking problem.
- 00:32
We have to figure out why the experiment went wrong based on what we know.
- 00:35
First things first, what's the proper procedure for the experiment?
- 00:39
Let's just follow the steps that they gave us:
- 00:41
Step 1- filter paper. Step 2- distillation chamber.
- 00:46
What was supposed to happen during each step?
- 00:49
Step 1- remove sand. Step 2- isolate salt.
- 00:53
So what went wrong in this question?
- 00:56
This student ended up with salt and sand in the distillation chamber.
- 01:00
But...step 2 says we should only have salt left in the distillation chamber.
- 01:04
Somehow, this student forgot to get rid of the sand before using the chamber.
- 01:08
Hmm, how could that have happened?
- 01:10
Could it be...that the careless student forgot to do step 1?
- 01:14
Forgetting the first step in this experiment means that the sand never got removed from
- 01:18
the salt and water, and was left with the salt in the distillation chamber.
- 01:22
Sounds like exactly what happened to this poor befuddled student.
- 01:27
Option C's the correct answer.
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