Today you will learn to use your background research to ask questions and make predictions.

A hypothesis is a tentative explanation of your observation (e.g., the eye grows larger each day). After you form a hypothesis, you test it with reasoning (e.g., I see the eye grow from one day to the next, so it must grow larger until it is fully formed). Tomorrow you will run an experiment to test your predictions.

• Review Chickscope Embryology to identify and study images where the eye of the developing chick is annotated.
• Next identify the eye from the images that are not annotated in the Chickscope MRI Database.
• Supplemental activities include formulating hypotheses about the sizes of various compartments of the embryo, such as the yolk of the egg, from day to day and discussing how to test them.