Young scholars calculate the SA/V ratio and volume of phenophthalien agar that are cut into different shapes. They then let ammonia diffuse into the various pieces of agar and determine the effect that SA/V had on the rate of diffusion.

Sixth graders apply the division and multiplication of decimals to convert dollars to various international currencies. In a travel simulation activity, they convert money, distance, and temperatures. During their "trip," students...

In this unit rate activity, learners solve 6 problems in which the unit rate in a consumer math story problem is calculated. There are no examples or instructions.

Students investigate factors affecting the rate of solubility. In this rate of solubility lesson plan, students experiment by crushing, heating and cooling solutes and solvents to see how the solubility is affected. For each situation,...

High schoolers use an on line website to simulate the effects of light intensity and wavelength on photosynthesis. In this photosynthesis lesson plan, students determine how wavelength of light and intensity of light affect the rate at...

In this energy changes, rates of reactions and nuclear chemistry worksheet, high schoolers solve 14 problems to review concepts about endothermic and exothermic reactions, heat of combustion, heat of reactions, enthalpy, kinetic and...

Students discover their strengths and weaknesses by rating themselves in certain areas.  In this self evaluation lesson, students complete a worksheet in which they rank their strengths and weaknesses in an academic setting....

In this jogging worksheet, students solve a distance and rate problem.  They determine the rate a jogger runs and calculate when the jogger and a train will meet.  This one-page worksheet contains 1 problem.  The answer is...

Students calculate pulse rates to determine level of exertion. In this human body lesson, students hike up a hill or steep slope and take their pulse. Students observe their breathing and energy level then record data. 

Students determine the best way to earn money.  In this financial wizard lesson, students read a story.  They compare different jobs, the rate of pay for each job and the number of hours required to do the job.  Students...

In this algebra worksheet, students calculate the rate of change as it relates to height and length. This is a word problem with 3 specific math questions as to how Frank S. Key came up with the song "Me and My Shadow"

In this chemistry review learning exercise, students answer 50 multiple choice questions on reaction kinetics. They identify the factors affecting the rates of reactions.

The National Chemistry Olympiad exams are comprehensive tests covering an entire  year of chemistry concepts. You can use them as practice for competing in the challenge, or simply as a review, or as an actual final exam for your...

Your young economists will be amazed at the effect of compounding interest more frequently in this collaborative task about making sound financial choices. Learners are walked through the calculations of a couple of examples and then...

Introduce high schoolers to chemical reactions with this series of activities. In a little over an hour, scientists observe four gas-producing reactions: the combination of hydrochloric acid and sodium hydroxide, placing pasta in...

Eight multi-step chemistry problems, including analyzing a titration, writing equations, predicting products and limiting reagents, calculating concentrations of ions, and using stoichiometry to solve for unknowns in reactions make up...

The 2009 version of the first part of a national chemistry competition is posted for your use with olympiad hopefuls. Test takers deal with 60 multiple choice questions covering an entire year of chemistry curriculum. Use this to...

This 60-question comprehensive exam was designed to determine who would go on to compete in the 2000 US National Chemistry Olympiad. Hopefuls answer multiple choice questions regarding all chemistry topics taught in the first year...

Sixty multiple choice questions cover the entire gamut of chemistry concepts. This is the local section of the U.S. National Chemistry Olympiad, where your chemistry candidates take a shot at entering the national competition. They...

In this chemistry olympiad problem solving worksheet, chemistry pupils solve eight problems on a variety of topics including periodic trends, phase changes, ionization reactions, catalysts and titrations.

Only eight problems are on this competitive national chemistry exam. It required the balancing of chemical equations, solving stoichiometry questions, and more. This is part two of three of the national exam. Also available is a...

As to be expected from the American Chemical Society Olympiad Examinations Task Force, this 60-question test tops the charts in terms of excellence. It consists entirely of multiple choice questions designed to assess a year's worth of...

How far have California's Channel islands moved? What was the rate of this movement? Class members first examine data that shows the age of the Hawaiian island chain and the average speed of the Pacific Plate. They then watch West...

Emerging ecologists need a full understanding of life, from the inner workings of a cell to the complex relationships among organisms. This examination is meant to assess high schoolers after an entire year of courses on the living...