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Dimensional Analysis
Test Description: How to convert units by cancelling out.
Instructions: Answer all questions to get your test result.
1) Which ratio would allow you to convert from 45 cm into feet?
A
2.54 cm/1 inch...because cm would cancel out
B
2.54 cm/1 inch...because cm would cancel out.
C
1 inch/2.54 cm...because feet would cancel out.
D
1 inch/2.54 cm....because cm would cancel out
2) How do you get units (or numbers) to cancel out?
A
They are both on the bottom of the fractions.
B
They are multiplied.
C
They are matched side by side.
D
There is a match on the top and bottom of the fraction
3) If there is a number on the top of a fraction and a number on the bottom of the fraction.....
A
You clearly have a multiplication problem.
B
You certainly must divide the top by the bottom number.
C
Obviously you have a cross multiplication problem.
D
Most definately you have to square the top and bottom
4) To convert from 500 seconds to minutes you would use....
A
60 minutes/1 second
B
1 second/60 minutes
C
60 seconds/1 minute
D
1 minute/60 seconds
5) Dimensional analysis is a method used to....
A
convert from one unit into another unit.
B
torture mankind.
C
cure mental illness.
D
make kids really mad.
6) In order to cancel units.....
A
you need two matches in your numerator.
B
you need to scratch out whatever you want.
C
you need a match on top and bottom.
D
you need to multiply in the correct order.
7) Why do you suppose we put our starting number and unit over 1?
A
to give it one leg to stand on.
B
because it's in the Bible.
C
to make it into a fraction
D
to make more work for kids.
8) The final units of your answer in a dimensional analysis problem are located.....
A
on the bottom of your final conversion
B
on the top of your starting number and unit.
C
on the top of your final conversion.
D
completely made up.
9) When multiplying fractions you should:
A
multiply all numbers no matter where their location is.
B
cancel out all numbers to make it easy to deal with.
C
cross multiply all numbers.
D
multiply numbers on top and divide by the numbers on the bottom.
10) 1000 mL is equal to ___________.
A
10 dKL
B
100 Liters
C
1 Liter
D
1 meter
*select an answer for all questions
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