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Journal Article
Science Sampler: What is relative humidity relative to anyway?
When describing the amount of moisture present in the air, the term "relative humidity" is frequently not understood. In order to help students grasp the concept of relative humidity, it helps to ask the question, "Relative to what?" This simple demo...
Journal Article
Student preconceptions are one of the greatest challenges we face as science teachers. This Predict, Explain, Observe, and Explain (PEOE) activity challenges students’ preconceived notions about why matter floats or sinks when placed in a liquid. T...
Journal Article
After the Bell: Beachcombing for fossils
If you have ever taken a field trip to a natural history museum or an aquarium, you may have noticed in the gift shop a display of fossil shark teeth that can be as old as 65 million years for sale. Where did these teeth come from? How are the ages o...
Journal Article
Issues in-depth: Inside global warming
Over the last 15 years, much attention has been given to global warming, and whether the increase in the Earth's temperature in recent decades threatens the survival of life on Earth. As such, it's important that science teachers understand the basic...