Janice found two sea shells when she went to the beach. They appear to be almost the same size, but they have different shapes. How could she figure out if their volume is the same?

A)Weigh each one on a scale to see which is heaviest.
B)Fill each one with water to see which will hold the most.
C)Drop each one in a beaker of water to see which raises the water level the most.
D)Measure the length of each one with a measuring tape to see which is longest.

THANKS!

B (we determine the inner volume)

C (we determine the total volume, i.e. the inner volume + the volume of shell substance)

To determine if the two sea shells have the same volume, Janice can use the displacement method. The displacement method involves measuring the change in water level caused by submerging the objects in water. Here's how Janice can apply this method:

C) Drop each one in a beaker of water to see which raises the water level the most.

1. Fill a beaker or a measuring cup with water, making sure to note the initial water level.
2. Gently and fully submerge one of the sea shells into the water, making sure it is completely underwater and not touching the sides or bottom of the beaker. Take note of the new water level.
3. Remove the first sea shell from the water and empty the beaker.
4. Refill the beaker to the initial water level and repeat the process for the second sea shell.
5. Compare the change in water level between the two shells. If the water level rises equally for both shells, then they have the same volume. However, if the water level rises more for one shell compared to the other, then the shell with the higher water displacement has a larger volume.

Therefore, the best option is C) Drop each one in a beaker of water to see which raises the water level the most.