Question

Place the window screen or kitchen strainer over the bucket. Pour the sand through the screen to sift it. Save the sand remaining on the screen and discard the sand in the bucket.

Divide the saved sand evenly between the two plastic trays.
Smooth the surface of the sand with the ruler. Measure and record the depth of the sand in each tray. Make sure each tray has an equal amount of sand.
Make a medium-sized hole in the sand at one end of both trays. Do not dig all the way to the bottom of the tray. Leave some sand at the bottom of the hole.
Place both trays inside the freezer. Prop up the ends with the hole about 1 inch.
Pour 1/4 cup water into the hole of the first tray. Do not add any water to the second tray.
Leave both trays in the freezer overnight. Add another 1/4 cup water to the first tray each day for two weeks. Do not add any water to the second tray.
After two weeks, measure and record the length of the ice in the first tray.
Remove both trays from the freezer and place them on a flat surface for a few hours. Allow enough time for most of the ice to melt.
Observe and record what each tray looks like.
Measure and record sand depth at each end of both trays.
How long was the ice flow in the first tray?
A. 2 weeks
B. 1 inch
C. The length of the ice
D. none of the above

Answer 1

The correct answer to the question, 'How long was the ice flow in the first tray?' is C. The length of the ice, which refers to the actual physical length of the ice that formed in the tray, not the duration of the experiment.

Step-by-step explanation:

The question deals with an experiment in which sand in two plastic trays is treated differently, with one tray receiving water over a period of two weeks and the other not. The purpose is likely to observe the effects of water on sand when frozen and how ice flow develops over time. Regarding how long the ice flow in the first tray was, the question refers to the length of the ice formation that occurred after daily additions of water and not the duration of the experiment. Therefore, the correct answer is C. The length of the ice.