American Chemical Society
Changing State: Melting
Dry ice is extremely cold — it is -109.3°F or -78.5°C. Scholars observe and explain the molecular motion associated with melting. Then they design their own experiments to speed up the melting process. Finally, a teacher presents a...
University of Georgia
Freezing and Melting of Water
Examine the behavior of energy as water freezes and melts. An engaging activity provides a hands-on experience to learners. Collaborative groups collect data and analyze the graphs of the temperature of water as it freezes and then...
Curated OER
Melting and Freezing Behavior
High schoolers investigate melting and freezing behavior in substances. In this melting and freezing points lesson plan, students perform experiments to test the impact of various salts on the freezing point of water, they test the...
Curated OER
Condensation Polymerization
This organic chemistry lab activity is appropriate for teaching polymerization, percent yield, melting point, or the types and uses of polymer materials. Chemistry pupils imagine that they are working for a company to develop a special...
Santa Monica College
Introducing Measurements in the Laboratory
We use basic units of measurement to break down things and communicate clearly. The first lesson in an 11-part series teaches the proper way to measure various items. It starts simply with measuring the dimensions and areas of geometric...
Curated OER
Physical Properties of Matter
Five fabulous procedures introduce physics or chemistry classes to special properties of matter. They discover adhesion and cohesion, solubility, melting and boiling points, and viscosity through hands-on experiences. Tests are...
Nevada Outdoor School
Let It Snow! Let It Melt!
Winter weather offers a great opportunity to teach young scientists about the states of matter. This activity-based lesson includes a range of learning experiences, from experimenting with the rate at which ice melts to singing a song...
Curated OER
Condensation Polymerization: Preparation of Two Types of Polyesters
College-level or AP chemists use phthalic anhydride to synthesize two different polyesters, one linear and one cross-linked in structure. A detailed materials list and well-written procedures are provided on a lab sheet. Learners write...
Curated OER
The Frigid Gourmet
Students make a " science surprise" or ice cream in the lab. In this melting point depression lesson plan, students use various substances with ice to determine the effects on the melting point of ice and the ability to make ice cream....
Curated OER
Phase Changes of Water
A micro-unit on the phase changes of water includes three laboratory activities. Junior scientists compare the densities of ice and water, and then they do the same for cold and warm water. They examine freezing and boiling temperatures....
Messenger Education
Design Challenge: How to Keep Gelatin from Melting
The inside of the spacecraft Messenger, which explores Mercury, will experience temperatures from 32 to 91 degrees Fahrenheit. In the final installment of a series of four space-related activities, groups spend time discussing and...
Curated OER
Freezing Point Depression
Students create ice cream in a zipped bag and measure the temperature of a salt/ice mixture. They discover how salt lowers the temperature necessary to freeze ice to a solid (below 0'C).
Hazardous Waste Management Program
Molar Mass Determination from Freezing Point Depression
Let the data tell the story. A lab activity has pupils collect temperature data on solutes as they melt and freeze. They use their data to create a cooling curve and then calculate the molar mass using the freezing point depression.
Curated OER
Ice Cream: a Taste of Science!!
Learners define the term solution. They explain conservation of energy and energy transfer as it relate to how the milk solution became ice cream. Students are able to explain freezing point depression.
Messenger Education
Design Challenge: How to Keep Items Cool in Boiling Water
Keeping items cool in boiling water... what? This engaging activity challenges high school learners to build a container that keeps butter in a solid state when placing the container in boiling water. Groups use previous knowledge and...
American Chemical Society
Changes Caused by Heating and Cooling
It's heating up—and cooling down—in here! A hands-on lesson allows learners to experiment with melting and freezing butter to observe changes as a substance transitions between liquid and solid form. They also view an animation that...
Curated OER
Condensation Polymerization: Preparation of Nylon 6/6
Students participate in a lab activity in which they synthesize nylon 6/6, calculate the percent yield by mass, identify the polymer as thermoplastic or thermoset, and determine the melting point, density and end-product use of the polymer.
Curated OER
Addition Polymerization: Preparation of Polystyrene Using Two Types of Initiators
Advanced chemistry classes compare the polymerization of styrene using two different initators: benzoyl peroxide and aluminum chloride. Once they synthesize polystyrene, they compare the two producet for melting point and density. There...
Curated OER
Investigating the Climate System: Energy, A Balancing Act
Earth science explorers design an experiment to demonstrate that the albedo of a surface affects its temperature. They test to find out if moisture on the surface affects temperature. They discover whether or not concrete or asphalt heat...
Curated OER
Heating and Cooling Curves
Students experiment with a pure substance and a phase change. In this heating and cooling curves lesson plan, students study the effects of heating and cooling a pure substance to observe a phase change. They determine both the melting...
Curated OER
Melting Ice is Hot Stuff!
Fourth graders determine the amount of energy required to melt ice using a calorimeter. They calculate the Molar Heat of Fusion of Ice.
Curated OER
Temperature Change and the States of Matter
Tenth graders observe the processes of evaporation, condensation, melting, freezing, boiling, and sublimation. They do a quantitative investigation of the freezing of water, to explore explanations that involve particles.
NOAA
Where There's Smoke, There's ...
A remotely operated vehicle approaching a volcano was engulfed by molten sulfur where the plumes of fluids contained the highest concentrations of aluminum ever recorded. This isn't science fiction or an April fools joke, though it did...
Peace Corps
Features of Culture
Explore the melting pot in your own classroom with a lesson that focuses on cultural beliefs, traditions, and traits. Middle and high schoolers examine the details of their own identified cultures before sharing them with peers, and...
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