Does Salt Evaporate?

In this ocean salt worksheet, students read about the processes that have lead to the salt content in the ocean. Then students complete 5 short answer questions.

Tenth graders observe the processes of evaporation, condensation, melting, freezing, boiling, and sublimation. They do a quantitative investigation of the freezing of water, to explore explanations that involve particles.

In this separation of a mixture, students experiment with salt and sand and design an experiment to separate a mixture of the two.

In this models instructional activity, students read about how models are used to communicate events or principles in science. They are given an example and answer 4 questions about models. They discuss accuracy and inaccuracy of models....

For this earth and beyond worksheet, students read information about dryland salinsation, a serious problem facing Western Australia, and then answer 14 questions about the topic.

How does the body immediately react to exercise? Review why the heart beats stronger, breathing quickens, body temperature increases, and muscles ache as a result of exercise, as well as some of the more long-term benefits of consistent...