The Michelson-Morley experiment
This lecture is also available in French and Spanish, and in PDF. A flashlet simulation of the experiment is included. It describes in comprehensible detail this historical experiment which showed that light has wave properties, but no aether exists, thought to be the medium of the waves.
Quick take on area and volume
This one-page document highlights online resources with virtual manipulatives that can help make area and volume real for students. Be sure to check out the sites these resources are from; the sites contain many other interesting and useful mathematics learning resources.
The path of light
This short article uses text and illustrations to explain that light travels in a straight path until it encounters interference.
Conan the Bacterium
This on-line news article reveals the defense strategy of radiation-resistant Deinococcus radiodurans to be a tightly packed ring of DNA. The article explores the hypothesis of some that indicates the microbe originated on Mars and describes the actions of others that used experiments to show resistance is not attributed to repair enzymes, as was once believed. The article details the implications of these findings and concludes with future studies regarding the organism.
Keeping Cool at Deep-Sea Vents
This Astrobiology Magazine article reports that a research team of marine scientists has determined that water chemistry controls the location and distribution of two species of weird worms inhabiting deep-sea hydrothermal vent sites: the tubeworm (Riftia pachyptila) and Pompeii worm (Alvinella pompejana). The article includes color images of the worms and monitoring equipment, links to related web pages and other astrobiology resources, and an MP3 machine text-to-speech function.
Wisconsin Fast Plants Program
This is the homepage of the Fast Plants organization. Fast Plants are inexpensive seeds which take approximately 2 weeks from planting to flowering. The website includes seed ordering, growing directions, and activities.
This online news article discusses the ability of tardigrades to withstand harsh conditions. The article covers the history, biology and significance of tardigrades, as well as the different types of cryptobiosis. It includes detailed images of the organisms and links to related web pages.
POP Goes Antarctica?
As students explore this Web site, they will learn how scientists work together to answer questions. This site follows several scientists to Antarctica where they are doing research on Persistent Organic Pollutants. A daily journal, glossary, and learning activities will help incorporate this into classroom lesson plans.
The Metric System : Metric and Scientific Notation
This lesson describes the history and basic operation of the metric system as well as scientific notation. Metric to English conversions and examples of unit conversions by moving the decimal are included.
The science of light : funhouse mirrors background
This page briefly describes and illustrates the laws of reflection. It includes a short section on pedagogy and it relates the content to standards.
Fossils, Rocks, and Time
This on-line book, published by the United States Geological Survey (USGS), discusses the use of fossils in determining the age of rocks. The publication covers how to place events in correct temporal order, a description of the geologic time scale, the use of fossils to indicate rock ages, the law of fossil succession, index fossils, and radioactive dating.
Absorption, Distribution and Storage of Chemicals
This module introduces the concept of biological absorption, storage and distribution of chemicals. It includes descriptions of the various chemical factors involved and diagrams of the cell membrane and human body.
Study of Climate Change in the Arctic
This page describes why and how scientists study climate change in the Arctic. It includes information on the climate indices and important research concepts used by scientists to study climate change.
PBS provides students in grades 4-7 with oodles of science fair ideas and a science fair tip sheet in this section of the DragonflyTV web site. Overviews of investigations from the television show are offered to help students hone in on an interesting topic and create their own science fair project. Each overview relays a question that a child asked on television, the main steps in his or her experiment, and the results. The overviews also include ideas for further investigations that build on t
Quick take on those dicey decimals!
Understanding decimals is a must and practice with them a basic necessity. These digital resources feature games, lessons, and interactive experiences that encourage understanding and practice at varying levels of mastery.
Help the immune system fight off an infection in this interactive feature from the NOVA: Surviving AIDS Web site.
Racing Game with One Die
This activity allows the user to play a game in which two players move towards the finish line based on the roll of a six-sided die.
Pre-Algebra Problem of the Week
Math problems for students learning algebraic reasoning, identifying and applying patterns, ratio and proportion, and geometric ideas such as similarity. The goal is to challenge students with non-routine problems and encourage them to put their solutions into words. A a href= /pow/support/ Teacher Support page/a is available for each problem.
Science Sampler : Differentiated assessment
One of the goals of science education is to encourage students to think and reason at increasingly higher levels. In order to accomplish this goal, the authors created a unique form of assessment that not only encourages students to work at the highest critical-thinking level possible, but also allows them creative liberty to express their understandings of the big ideas. This enables all students, including English language learners and special education students, to achieve their potential thr
Heat and temperature
Knowing the difference between heat and temperature is important if one is to have a clear understanding of energy. In this section we will define both terms and reach an understanding of how they are related ideas, but not identical ideas.