After discussing the traits of a good scientist, students began their exploration of the bay by studying a satellite map. They identified bodies of water and important landmarks including bridges and islands.
In their first experiment, students placed an egg in containers of fresh and salt water to compare the density of the two. Those who hypothesized that the salt water was more dense proved to be correct. As Maya said, the fresh water is lighter than the egg and the salt water is heavier than the egg.
Following an exploration of the relative density of salt water vs fresh water, students built clay models of the bay inside tubs. They then added blue water to the Pacific Ocean and clear water to the Sacramento River. The two mixed to create a light blue San Fransisco Bay.
The final portion of the program provided an opportunity to explore some bay organisms. First, students used all five senses to develop scientific descriptors of seaweed. They also examined dugeness crab and striped bass up close. Finally, they watched a video, "kids by the bay" that helped them explore how we can help the bay stay healthy.
