The sun sometimes releases huge bursts of electrified gases into space. These bursts are called coronal mass ejections (or CMEs). When CMEs are directed towards Earth they can generate auroras, the spectacular atmospheric displays also...

Meilin is weighing bags of rice. Explore mass and help him convert units of measurement.

Practice your density, mass, and volume calculations with these interactive review problems.

Download these free worksheets to sharpen your skills in converting units. Sheets focus on converting between a wide variety of measurement units including mass, length, volume, temperature, time, and many more.

Solve word problems that involve converting between US customary measures of distance, volume, and mass. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Learn all about wind, what it is, words used to describe wind, the different types, the coriolis effect, different types of breezes, and how wind is measured.

On this site, find a variety of materials to help students understand the conservation of matter. Create lessons that allow students to measure and graph quantities that could show even if matter is heated, cooled or combined with other...

Explore the concept of the calorie. Determine the calories/gram of the burned food by measuring its mass, and make conclusions about the experimental design.

A metal cylinder used for setting the international standard of the kilogram has been slowly gaining mass over the years. This article describes the impact of that mass gain and what scientists are doing to shrink it back to size.

This resource provides information about obesity, and the importance of weight control.

Kids learn about force in the science of physics and the laws of motion including units and measurement. How to calculate force from mass and acceleration.

Be ready to smash the monsters by solving problems involving volume, mass, and time in this math game.

Convert between metric measures of distance, volume, and mass. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Examine dog foods designed to clean teeth surface during chewing, design a human snack and measure its calories per mass. Discuss foods that might work as "edible toothbrushes" for people.

Demonstrate the effect that dissolving different amounts of salt in water has on the density of the liquid.