In this activity, students study gas laws at a molecular level. They vary the volume of a container at constant temperature to see how pressure changes (Boyle's Law), change the temperature of a container at constant pressure to see how the volume changes with temperature (Charles’s Law), and experiment with heating a gas in a closed container to discover how pressure changes with temperature (Gay Lussac's Law). They also discover the relationship between the number of gas molecules and gas volume (Avogadro's Law). Finally, students use their knowledge of gas laws to model a heated soda can collapsing as it is plunged into ice water.

The microscopic world is full of phenomena very different from what we see in everyday life. Some of those phenomena can only be explained using quantum mechanics. This activity introduces basic quantum mechanics concepts about electrons that are essential to understanding modern and future technology, especially nanotechnology. Start by exploring probability distribution, then discover the behavior of electrons with a series of simulations.

This article examines the reading comprehension strategy known as making connections. It involves linking what is being read (the text) to what is already known (schema, or background knowledge). The author provides links to four online resources that will help readers use the strategy in K-5 science and literacy classrooms. The article appears in the free, online magazine Beyond Weather and the Water Cycle, which integrates science and literacy instruction.

Topic 5 : LearningLearning objectives:1.      Define reflex and learning, as well as these three types of learning: Classical Conditioning; Operant Conditioning; and Observational Learning (also called “social learning” or “modeling”).2.      Explain what happened in Pavlov's dog study; Watson's "Little Albert" study; and Bandura’s observational learning study.3.      Describe the following concepts in Classical Conditioning: conditioned and unconditioned stimuli; and conditioned and unconditioned responses.4.      Describe the following concepts in Operant Conditioning: positive reinforcement; negative reinforcement; positive punishment, negative punishment, shaping and behavior modification.5.      Explain the steps involved in “modelling”

What do plants eat? This unit explores plants and how they make food.

For teachers in K-Grade 5 classrooms, the author of this article reviews the reading comprehension strategies known as Summarizing and Synthesizing. She provides links to web sites and to a book that will provide more background information and lessons. The article appears in the free, online magazine Beyond Weather and the Water Cycle, which focuses on the seven essential principles of climate science.

Unit plans for Grades K-2 and 3-5 are a regular feature of the magazine Beyond Weather and the Water Cycle. The plans draw on articles and resources in a themed issue and are aligned with national science and language arts standards. This unit is designed to provide elementary students with the opportunity to investigate how the annual rings in trees help scientists learn about past climates. It uses hands-on experiences and nonfiction text to answer the unit question: How do trees help scientists learn about the past?