Mixtures, weighted percentages, and varying speeds make problem solving difficult. The resource give learners a strategy for tackling these types of problems effectively. 

Not all chemical reactions happen at the same rate because some, like explosions, occur quickly and some, like rusting, occur over time. Here, learners explore chemical reactions and their rates in the 16th lesson of 36. Through readings...

Can you power this? Individuals do an energy audit for the classroom to determine the amount of electricity needed to power it. Using either live data or sample data from wind turbines they decide whether it would power the classroom....

Thunderstorms, tornadoes, floods, and hail are just a few of the topics covered in a thorough weather preparedness guide. With descriptions of each weather phenomenon, from what causes them to how and when they occur to...

This animated tutorial illustrates distance and displacement to define speed and velocity.

An activity in which average speed is calculated for a ball sliding along an inclined plane. This speed is compared to various instantaneous speeds along the incline.

What is speed? What is velocity? Illustrated discussion of speed and velocity including how they are measured.

Gain an understanding of average velocity and speed with this helpful reference tool. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.

This Chem4Kids.com site explores the rate of reactions. Content focuses on forces that change the speed of reactions, and measuring rates.

This study guide on motion covers some key vocabulary and terms to describe motion: displacement vs. distance, acceleration, speed vs. velocity, and instantaneous vs. average. It includes graphs showing distance vs. time, velocity vs....

Good site for some general information on the movement of mammals. Gives a description and gives the average speed of a variety of animals.

A table listing the average radius of orbit for the nine planets about the sun; expressed in astronomical units. Data can be used to calculate the orbital speed or the orbital period.