Posted by **Jenny** on Monday, January 7, 2008 at 9:21pm.

Sally does an experiment with goldfish. She keeps one goldfish in a bowl and puts it under a lamp. She puts another goldfish in a bowl and puts it in the dark. After 24 hours she a has each one swim through a hoop. Which fish will most likely swim through the hoop first.

The hoops are exactly the same.

I think the one in the light will swim through the hoop first because it had more energy from the light.

- Life Science -
**PsyDAG**, Wednesday, January 9, 2008 at 12:48pm
First, how large is the goldfish bowl? If it is small enough, the fish could not *avoid* swimming through the hoop.

Since — to my knowledge — fish do not obtain energy via photosynthesis, they would not be getting "more energy from the light."

Although some fish species have adapted to darkness through generations by losing their sight, 24 hours is definitely not enough time for this process.

What is your (or Sally's) hypothesis for the experiment? What leads to this hypothesis? Is swimming through the hoop *first* important? Why?

I hope this helps. Thanks for asking.

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