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Contributed by: National Assessment of Educational Progress (NAEP)
Here are samples of student responses along with their score points.
Student Sample Response
- Look at the pencil in the fresh water. There are letters
along the side of the pencil. Make sure the pencil is not touching
the side of the cylinder. Note the exact level where the water
surface meets the side of the pencil, as shown in picture A. Then
draw a line on picture B where the water surface comes
to on your pencil. This line will help you to remember where the
water level comes on your pencil for the next step (4).
Level:
Complete (4)
- Look at the pencil in the salt water. Look at the letters
along the side of the pencil, as shown in picture A. Where does
the salt water come up to on the pencil? Now look at picture B.
Draw a line on picture B where the water level comes to on your
pencil.
Level:
Complete (4)
- Now use the floating-pencil test to find out if the water
in the bottle label Mystery Water is fresh water
or salt water. Do your test just like you did for the fresh water
and the salt water. For this test, you can draw lines on the pictures
of the pencil and the ruler below.
Level:
Complete (4)
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