American Chemical Society
The Energy Efficiency of Heating Water
Can a small change in laboratory procedures save energy? Scholars test three different methods for heating water in a science lab. Then, they calculate the energy efficiency for each and compare them to determine which uses the least...
Curated OER
Physical vs. Chemical Changes
In this chemical reactions learning exercise, students read about the differences between physical and chemical changes in substances. Then students identify situations as either an example of physical or chemical change. Students learn...
Curated OER
Physical and Chemical Reactions - Factors Which Affect Reaction Rate
A total of five experiments lead chemistry pros to understand the difference between physical and chemical change. They also experiment with exothermic reaction factors that affect rate of reaction. The procedures are not written in the...
Curated OER
Physical and Chemical Changes Crossword
In this chemistry worksheet, learners complete a crossword puzzle with 15 clues about both physical and chemical changes. Each clue lists number of letters for correct word.
Curated OER
Answers for Physical and Chemical Changes Crossword
In this chemistry instructional activity, students are provided with the answers for a crossword puzzle containing 15 clues about physical and chemical changes.
NASA
Ripening of Fruits and Vegetables
How long do fresh foods last in space at the International Space Station? Which foods perish quicker than others? How can astronauts preserve their foods to make them last longer in space? Young scientists test the rates at which...
Creative Chemistry
The Reaction Between Magnesium and Hydrochloric Acid
In this rate of chemical reactions worksheet, learners experiment with different concentrations and volumes of hydrochloric acid mixed with magnesium to explore the rate of chemical reactions. They measure the rates of the reactions and...
American Chemical Society
The Energy of Evaporation
Do all liquids evaporate at the same rate? Young scientists observe the evaporation rate of three different liquids. They measure the time, the temperature, and the change in energy. After comparing the chemical formulas, scholars...
Santa Monica College
Chemical Equilibrium and Le Chatelier’s Principle
Henri-Louis Le Chatelier wrote many papers throughout his 85-year life, but he is remembered for one of his earliest discoveries, now known as Le Chatelier's Principle. The final instructional activity in an 11-part series encourages...
Curated OER
Keep it Bottled Up: Linear Rates of Pressure Increase
Pupils explore linear functions in this instructional activity when they collect and analyze data as a chemical reaction proceeds. Learners record pressure versus time data and model the data as a linear function. They also examine the...
Curated OER
Rate and Concentration
Experimental data for a chemical reaction is available in a table. Chemistry cohorts use critical thinking skills to analyze the data and answer questions about reaction rates and reaction order. This worksheet is neatly formatted,...
Curated OER
Physical and Chemical Changes
Students examine the different changes in matter. In this chemical change lesson students determine the amount of reactant made in a reaction using the law of conservation.
American Chemical Society
Evaporation
This is one in several lessons that explore the relationship between temperature and phase changes of water. After some discussion, elementary physical scientists place wet paper toweling on a hot and a room-temperature water bag...
American Chemical Society
Changing State: Evaporation
Why do experiments require a control? Guide scholars through designing an experiment to see what they can do to evaporate water faster with a lesson that stresses the importance of controlling all variables. The second activity...
Curated OER
Fizzy Pop
Fifth graders compare and identify variables that affect the rate of a chemical change using Alka-Seltzer, water, ice, and hot water. They time how long each variable takes to pop the canister into the air, and record the results on a...
Curated OER
Chemical Reactions and Energy
The details here give definitions about chemical reactions and the energy transfer in those reactions. The reactions given include general examples of catalysts, inhibitors, and other situations that affect the rate of production and...
Curated OER
Rate of Solvation
Students test factors that may affect the rate at which sugar dissolve in water. They conduct two studies: One is to test the effect of temperature on the rate of solvation and the other is to test a factor which Students come up with...
Curated OER
How Can we Measure the Rate of a Chemical Reaction?
Learners examine different types of chemical reactions. They explore how alcohol molecules affect the reaction rates. They answer discussion questions to end the lesson.
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...
Curated OER
Dust in the Wind; Chemicals in the Water
Students explore mechanical and chemical weathering at stations. They articulate some mechanisms of chemical and mechanical weathering through exploration in a lab. Students stations describe how chemical weathering differs from...
Teach Engineering
Skin and the Effects of Ultraviolet Radiation
Though UV radiation can damage skin, it isn't all bad. The third installment in a six-part series allows the class to study the structure and function of skin. They learn about the different types of skin cancer and the SPF rating...
Royal Society of Chemistry
A Visible Activated Complex Experiment
When was the last time your class saw a catalyst in action? Chemistry scholars observe an activated complex during an engaging experiment. Through both color change and evolution of a gas, individuals gain insight into the...
Concord Consortium
Chain Reaction Between Hydrogen and Oxygen
Looking for a simple way to teach conservation of energy in chemical reactions? Pupils can observe energy changes as water forms during a chain reaction between oxygen and hydrogen using an interactive. The resource instructs users to...
National Institute of Open Schooling
Chemical Equilibrium
Le Chatelier's interest in thermodynamics and building materials such as cement and plaster led to the Le Chatelier Principle in 1884. Activity 13 in a series of 36 extensively explores chemical equilibrium. Learners read about...