University of Georgia
What's So Special about Bottled Drinking Water?
Is artesian water designed to be better, or is it just from wells similar to those in the city of Artesium? This experiment looks at many different types of bottled waters, including artesian. Using a soap mixture, scholars test to see...
NASA
The Case of the Wacky Water Cycle
Join the tree house detectives in learning about the processes of the water cycle, water conservation, water treatment, and water as a limited resource.
American Chemical Society
Heat - Energy on the Move
Turn up the heat. Individuals conduct two experiments to observe the difference between heated water and air versus cold water and air. Using food coloring, pupils observe the movement of the molecules in the two temperatures of water. A...
American Chemical Society
Time for Slime
Slime is more than just a fun pastime. Learners study the bonding of polymers using a mixture of glue, borax, and water. They then explore the properties of the slime and learn how the polymers in glue bond with ions in borax.
Creative Chemistry
Energy Changes in Reactions
For this chemical bonds learning exercise, learners determine how much energy is needed to break bonds. Students classify reactions as exothermic or endothermic and identify a reaction as reversible. This learning exercise has four...
Nuffield Foundation
Investigating the Effect of Temperature on the Activity of Lipase
How does temperature affect lipase activity? Young scholars conduct an experiment to collect data on the interaction of lipase at different temperatures. They add lipase to a solution of milk, sodium carbonate, and phenolphthalein and...
Colorado State University
How Can Freezing Make Something Warmer?
Crazy fact—freezing liquid actually gives off heat! Young scholars investigate the transfer of energy when liquids freeze using a chemical heat pack. The heat pack gives off heat as its liquid core freezes.
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...
LABScI
Acoustics: The Sound Lab
If the delay between a sound and its echo is less than 1/10th of a second, the human ear can’t distinguish it. Through the use of a Slinky, rubber band guitar, and straws, scholars explore where sound comes from and how it travels....
Colorado State University
Does Air Weigh Anything?
Can you feel the weight of the air on your shoulders? Your classes may not believe that air has weight. A straightforward experiment asks individuals to weigh a bottle before and after adding air. Their results may surprise them!
Chymist
Empirical Formula of a Compound
Because of the work of John Dalton, we are able to write formulas for compounds. The hands-on experiment has scholars prepare a compound from its elements. Using mass data, individuals write the empirical formula for the compound.
LABScI
Enzymes: The Spit Lab
Enzymes in our bodies each have a job to do. Learn the factors that affect the activity of some enzymes using the third activity of an informative 12-part biology series. A three-part laboratory activity asks teams to investigate how...
Creative Chemistry
Acidity or Hydrolysis Reactions
In this acidity or hydrolysis reactions instructional activity, high schoolers read about the different types of metal ions and how they react in aqueous solutions. They also read about the factors affecting the acidity of metal ions,...
Science Education Resource Center at Carleton College
Serc: Investigating Water Molecules: Adhesion and Cohesion
An activity where students observe the properties of water. During this lab, students will see the nature of waters property by observing both the adhesive and cohesive properties.
Bill Nye
Bill Nye: Hole Y Water
This tutorial from Bill Nye uses an experiment with water and sugar to show how matter is mostly empty space.
Science Buddies
Science Buddies: Measuring Surface Tension of Water With a Penny
Have you ever wondered what makes water 'bead' up on a freshly waxed car? In this project you'll investigate the chemistry of surface tension by measuring how many drops of water a penny can hold.
Bill Nye
Bill Nye: Hole Y Water
Try this at-home science experiment to learn that a glass of water molecules contains a whole lot of space.
Science Education Resource Center at Carleton College
Serc: Lab 6: Air, Water, Land, & Life: A Global Perspective
An investigation that is part of a series of lab lessons that expose students to Earth Systems through research, data, and visualizations. In this lab, students will follow the pathway of water on a big scale and a small scale down to...
Physics Central
Physics Central: Physics in Your Glass: Racing Molecules
An easy experiment for demonstrating and exploring molecule movement requiring common household items: two glasses, two dark colors of food coloring, and warm and cold water. A few variations to the experiment will have students using...
Science Buddies
Science Buddies: What's the Point of Boiling?
You know that water can exist in three separate phases: solid (ice), liquid (water), and vapor (steam). To change from one phase to another, you simply add (or remove) heat. When water boils, what happens to molecules (for example sugar...
Other
Science Alive: Pure Substances, Mixtures, and Separations
One way scientists talk about matter or substance-that is, the stuff in the world-is in terms of pure substances and mixtures. Pure substances are substances that contain only one kind of molecule. Water with nothing else in it is a pure...
Bill Nye
Bill Nye: Sock It to Me
This tutorial by Bill Nye explains how evaporating water (or sweat!) can cool you down.
Science Buddies
Science Buddies: Bubble Ology
Making your own bubble solution is fun, but sometimes the bubbles don't seem to work as well as the solutions you buy in the store. In this experiment you can test if adding corn syrup or glycerin to your bubble solution will make it...
PBS
Pbs Teachers: Salt and Pepper Experiment
Demonstrate surface tension by sprinkling pepper on a bowl full of water, then touching a soapy finger to the water.
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