In this kidneys worksheet, students review the function of the kidneys including what happens when the kidneys stop working. Students also compare kidney function in fish, frogs, and kangaroo rats. This worksheet has 86 fill in the blank...

Students develop an understanding and appreciation of water purification techniques and their implications for health maintenance.

Students study the history of the Pledge of Allegiance. They investigate the First Amendment concept of separation of Church and state using Internet resources.

Fifth graders watch a video about physical and chemical changes. In groups, they participate in a variety of activities involving color. They write their observations in a journal. To end the lesson, they use a checklist to classify...

Fifth graders, in groups, complete an experiment/activity in which they dissolve salt in a cup of hot water and then observe what happens as the water evaporates over the next few weeks.

Students will create a garden with specific fabrics to a set grid (p 73) to fit the pull-out pattern of the gate. This pattern will be transferred onto the foreground which in turn will be basted onto the garden. A hand needle-turn...

Watch a reaction proceed over time. How does total energy affect a reaction rate? This model represents an analogy of chemical reactions.

Acting as an overview from the General Chemistry Virtual Textbook, this site seeks to answer the question, what is a reversible reaction? Acting as part of a larger informative site on equilibrium, various topics are addressed including...

Find out what a reversible reaction is in this narrated screencast. Also learn how this is different from a reaction that comes to completion. [2:48]

[Free Registration/Login may be required to access all resource tools.] Reversible and irreversible reactions and equilibrium.

This chemistry chapter covers everything about chemical reactions. Read about the collision theory, rates of chemical reactions, reversible reactions, and chemical equilibrium. Many pictures and graphs will help to explain the concepts.

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

This Chem4Kids.com site explores the rate of reactions. Content focuses on forces that change the speed of reactions, and measuring rates.

[Free Registration/Login may be required to access all resource tools.] Students determine the temperature at which a reversible reaction will achieve equilibrium by using the Gibbs free energy equation, and then describe the...

Reversible reactions, equilibrium, and the equilibrium constant K. Learn how to calculate K, and how to use K to determine if a reaction strongly favors products or reactants at equilibrium.

There are a variety of rates scientists measure when studying chemical reactions. This resource highlights five rates often measured.

[Free Registration/Login may be required to access all resource tools.] Definition of chemical change and examples, signs of chemical change and how it can be reversed.

The chemical change of matter is illustrated in this lab experiment when spaghetti is placed in a solution of baking soda and vinegar. Watch the spaghetti rise to the surface and sink again once the gas is released.

Read the passage and study the diagram to answer the five-question quiz that follows.