This lesson is intended to help students realize that they can learn a lot about chickens—and animals in general—through close observation. They also should come to understand that it is important to learn about the special needs of eggs/chicks in order to take care of them, whether on a farm or in a classroom hatching project. This lesson can be used as an orientation for students before doing a chicken-hatching unit in class. It may also be used in conjunction with the unit to emphasize the importance of the proper care for eggs/chicks. 

In this lesson from the American Association for the Advancement of Science, students observe what happens to a closed container containing heated water is cooled.  Students use their observations to construct an explanation of what happened.  The lesson includes suggested questions for a teacher to use to probe student understanding as they make their observations.  The lesson would be a valuable activity to include in a unit on states of matter to help students build understanding of the particle-level nature of matter.  Connections to common misconceptions are included in the resource that can be used to guide teacher questioning durign the lesson.

This Science NetLinks resource challenges you to think about the positive and negative consequences of various types of power. The site provides you with a specific monetary budget, which you can use to purchase power plants for your city. As you choose your types of power, you will learn how much power the plant provides, how much it costs, and the effect it could have on the environment. (taken from website)