On this interactive site students practice time and mass skills. By the end of the lesson students will be able to describe the mass of more than two objects and record the mass of three objects by lifting.

It's hard enough to weigh something as itty bitty as atoms or molecules. Factor in that they're careening by faster than Jeff Gordon on steroids, and you get an idea what scientists are up against. Using comet particles from NASA's...

This resource provides historic information on length measurement in the United Kingdom. Click on the topics on the left toolbar of the article to find out more information.

On this interactive site students learn to use various units of mass to solve problems and put objects in order by their mass.

This site examines the specific difference between mass and weight in addition to length, temperature, and time.

[Free Registration/Login may be required to access all resource tools.] In this learning module, students will learn the significance of using moles in converting between measurements and in understanding how much of something you have.

Neutrinos, described here, are particles scientists still have a lot to learn about. They are trying to measure their masses. "Explain It In 60 Seconds" is an article series that aims to summarize in a few paragraphs the meaning of...

An introduction to the mole, a unit of measurement that quantifies atoms and molecules.

Vasarosnamenyi Baro Eotvos Lorand, better known as Roland Eotvos or Lorand Eotvos throughout much of the world, was a Hungarian physicist who is most recognized for his extensive experimental work involving gravity, but who also made...

Students will use two different methods to determine the densities of a variety of materials and objects. The first method involves direct measurement of the volumes of objects that have simple geometric shapes, while the second uses the...

Students will learn the concept of volume by determining the amount of sand that is needed to fill the long-jump pit at their school (or any rectangular- or square-shaped container). This lesson will explain the importance of knowing how...

By the end of this section, you will be able to do the following: Perform unit conversions in both SI and English units, Explain the most common prefixes of SI units, and be able to write them in scientific notation.