Curated OER
Sorting Plastics For Recycling
First, young chemists practice polymer identification by density and flame tests. With the data collected, they propose a method of separating polyethylene from other plastics and determine what property makes it desirable for recycling....
Curated OER
Conserving Chemical Resources
High schoolers balance chemical equations and solve for gram to mole ratios.
Curated OER
What Influences Reaction Rate?
Students study reaction rates, what determines how fast a reaction happens and how the chemical changes occur. In this reactions lesson students complete a lab where they use Alka-Seltzer to observe reaction rate and create a graph with...
Curated OER
Matter Test
Physical science learners define matter, explain the law of conservation of matter, and identify compounds according to their state on this twenty-question test. Most appropriate for the introductory physical science class, this resource...
Curated OER
Natural Resources
In this natural resources worksheet, students compare examples of chemical and physical properties, balance equations, and calculate molar mass and moles. This worksheet has 12 problems to solve and 12 short answer questions.
Curated OER
Stoichiometry
In this stoichiometry learning exercise, students review concepts related to stoichiometry including molar ratio and conservation of matter. Students calculate the number of mole is specific reactions. This learning exercise has 7 fill...
Curated OER
Resources - A Reading Guide
In this resources worksheet, students compare and contrast physical and chemical properties and changes. Students review the periodic table, pattern of atomic numbers and chemical reactivity. This worksheet has 56 short answer questions.
Vision Learning
Visionlearning: Chemical Relationships: Chemical Equations
An introduction to chemical reactions and an explanation of balanced equations.
American Association for the Advancement of Science
Aaas: Project 2061: Substances, Chemical Reactions, and Conservation of Matter
[Free Registration/Login Required] Create a science test that checks for student understanding in science, for common misconceptions, as well as for correct ideas. This is a list of key ideas related to Substances, Chemical Reactions,...
American Chemical Society
Middle School Chemistry: Lesson Plans: What Is a Chemical Reaction?
After observing a demonstration of a chemical reaction between a burning candle and the oxygen in the air, students use atom model cut-outs to model the reaction and see that all the atoms in the reactants show up in the products.
Better Lesson
Better Lesson: Changing Matter:changing Matter: Is Weight the Same or Different?
Students conduct a hands-on investigation to determine how matter, changing state, effects the property of weight. Students will collect data and graph their results. Resources include step by step instructions, a data worksheet, videos...
American Chemical Society
Middle School Chemistry: Controlling Amount of Products in a Chemical Reaction
Students analyze the chemical equation for the reaction between vinegar and baking soda. They observe that the gas produced in the reaction is also part of the products of the written chemical equation.
McREL International
Mc Rel International: Naep Released Item [Pdf]
A released question from the National Assessment of Educational Progress (NAEP) test about the conservation of matter. Includes scoring guide.
US Geological Survey
Mercury in the Geochemical Cycle
Mercury in the geochemical cycle ultimately affects the food chain. Learn about this and its effect on the Everglades.
Utah Education Network
Uen: Trb 5:1 Act. 4: Chem. Reactions Borax & Glue, Cream
For this experiment for Grade Five, students develop an understanding that chemical changes in matter do not affect the actual mass of the matter.
CK-12 Foundation
Ck 12: Chemical Reactions
[Free Registration/Login may be required to access all resource tools.] What happens in a chemical reaction is explained, along with how it is represented by a chemical equation. In a chemical reaction, the law of conservation of matter...
CK-12 Foundation
Ck 12: Earth Science: Flow of Matter in Ecosystems
[Free Registration/Login may be required to access all resource tools.] In this module, students will learn about the cycles of nature (water, carbon, nitrogen, and phosphorus) that support the flow of nutrient matter through an...