It's assessment time! Determine your young mathematicians' understanding of elapsed time with this brief, five-question quiz.

In this chemistry olympiad laboratory worksheet, learners design and carry out two experiments. They design one experiment to test for the percent mass of a substance in a solution and they design another experiment to identify two...

In this online math worksheet, learners solve word problems associated with percentage. This excellent resource allows the students to check their answers, and to get "hints" should they run into difficulties. A terrific teaching tool!

In this chemistry activity, learners determine the oxidizing agent and the reducing agent in each stated problem. Then they determine the molarity of acetic acid. Students also use the previous activities to predict whether a...

In this stoichiometry worksheet, students solve a variety of problems including finding empirical and molecular formulas, determining molarities of solutions, determining molecular weights of compounds and calculating the percent mass of...

Many types of cancer treatments now depend on nanotechnology—a big "little" discovery. Scholars begin by removing "malignant" tissue from simulated brains, one using fluorescent markers thanks to nanotechnology and one without. This...

In this concentration worksheet, students find the percent volume of a compound in a solution and the molality of a solution. They determine the percent mass of a compound in a solution and they determine the mole fraction of water in a...

In this chemistry review worksheet, students answer and solve 95 questions about chemical reactions, hydrocarbons, functional groups, moles, acids and bases and solutions.

In this solubility activity, students use a solubility curve to determine is different solutions are saturated or not. This activity has 19 problems to solve and 2 short answer questions.

Students explain how to make solutions with specific concentration. In this chemistry lesson, students differentiate acids and bases. They calculate molarity of solutions.

Your young apprentices build a function describing the percent concentration of salt in a brine. The rational function is then related to the parent function, y= 1/x, and graphed. Finally, the apprentices predict the amount of fresh...

Students complete a worksheet on solutes in chemistry. They are given an equation in order to find the total mass solution, molarity, and molality.

Learners explore chemical solutions. In this chemistry lesson plan, students investigate the relationship between three related experiments about solutions. Learners determine variables that affect the chemical concentration of each...

For this chemical solutions worksheet, Students determine the significance of the critical point in a phase diagram and rank solutions from weakest to strongest solute-solvent interaction. This worksheet has 4 problems to solve.

In this Hess' Law worksheet, young scholars write their data and calculations from the lab they performed on Hess's Law. They calculate the heat of reactions per mole of substances used and calculate the theoretical heat of reaction and...

In this molarity worksheet, students are given balanced equations and they are to calculate the mass or volume of reactants and products. Students calculate the theoretical, percentage, and actual yield for chemical equations. This...

In this percentages worksheet, learners read about how to express numbers as fractions, convert to decimal form and find the percent. They practice by solving four problems using the method they read about.

Space scientists investigate the cosmic phenomena in order to search for answers to possible origins of the solar system. They consider the concepts of elements and  isotopes. Data is analyzed looking at tje abundance of elements...

Students calculate the concentration of different solutions. In this chemistry instructional activity, students explain what a solution is. They explain ways to change the concentration of a solution.

In this concentration activity, students determine the molality, mole fraction, and the percent by mass for the given solution. This activity has five problems to solve.

Young scholars conduct an oxidation experiment in which they must determine how much hydrogen peroxide (H2O2) is actually in a store-bought solution of H2O2.

In this stoichiometry learning exercise, learners review definitions and equations associated with molarity, density, atomic mass, molarity, and dilutions. This learning exercise has 18 word problems.

Students analyze the level of acid and base in a titration. In this chemistry activity, students investigate the amount of acid and base required to create certain household chemicals. They perform this activity without the use of burets.

Learners define and discuss salinity, conduct classroom experiment to determine salinity of water sample by using hydrometer, record predictions, and demonstrate understanding of how salinity influences object's ability to float in water.