The iodine clock reaction is a fun way to investigate many reaction rate factors. In this video, we will show you how to carry out a green chemistry version of the iodine clock reaction that uses less toxic, more eco-friendly, chemicals than traditional versions. Can you find a way to precisely time the color change? Written instructions are available on our website at…
Fires need fuel, oxygen, and heat to burn. So, what happens if one of these ingredients is taken away? In this video, we will show how you can extinguish a flame using a chemical reaction. Can you find out what makes the flame go out? Written instructions are available on our website at https://www.sciencebuddies.org/stem-activities/firefighting-foam?ytid=q8udWLU2HQk&ytsrc=description
Science Buddies also hosts a library of instructions for over 1,500 other hands-on science projects, lesson…
When three clear solutions are combined together, the mixture remains colorless for a few seconds, then it develops a bright orange precipitate and finally, after several more seconds, it suddenly turns black. Due to the colors which appear (orange and black), this demonstration is often called the "halloween clock reaction" or the "Old Nassau reaction" (the latter name refers to the Princeton University, where the reaction was discovered). Moreover, the timing between the transitions can be…
Have you ever wondered why silver jewelry that starts out nice and shiny turns brownish-black and dull over time? The brownish-black stuff is called silver tarnish, and it is the result of a chemical reaction on the silver's surface. In this video, we show you how you can use electrochemistry to create or remove silver tarnish from silver objects. You can use these methods to give your jewelry a vintage look or if you want to make it nice and shiny again. Written instructions are available on…
Diluting a sample or solution is common practice in science. This video explains everything you need to know about diluting a solution or sample. We show you different ways of making a dilution, discuss dilutions and dilution factors, and walk you through calculating concentrations of different dilutions.
Science Buddies also hosts a library of instructions for over 1,500 other hands-on science projects, lesson plans, and fun activities for K-12 parents, students, and teachers! Visit us at…
This video explains everything you need to know about solutions and how to prepare them. We will also introduce the concept of solution concentrations and go through some example calculations.
To learn even more about how to make and use solutions, try these resources:
Written tutorial on How to Make Solutions: https://www.sciencebuddies.org/science-fair-projects/references/how-to-make-a-solution?ytid=vJmIJ951p1o&ytsrc=description
Video on How to Dilute Solutions:…
Make and test edible rice paper with the fun STEAM activity. Check out written instructions and the science behind the activity on the Science Buddies website: https://www.sciencebuddies.org/stem-activities/rice-paper?ytid=TnHPLc87XiM&ytsrc=description
Science Buddies also hosts a library of instructions for over 1,000 other hands-on science projects, lesson plans, and fun activities for K-12 parents, students, and teachers! Visit us at…
This video will show you how to embed seeds in agar plates so you can conduct seed germination experiments. This process is easy and the clear agar and petri dishes allow you to easily observe the seeds as they germinate. For a science project using the agar plates, see the Grow Plants in Microgravity experiment on the Science Buddies website:…
What food dyes are in your candy? Is black ink really black? What gives fall leaves their color? These are all questions that you can investigate using paper chromatography – a technique that can separate mixtures into their individual components. This video explains how paper chromatography works, walks you through each step of a paper chromatography experiment, and provides tips and tricks for troubleshooting. We also introduce a couple of fun science projects that you can do using paper…
You probably know that objects sink or float in water depending on their density. But did you know that liquids can sink and float, too? In this activity, you will create a colorful liquid density column by stacking different liquids on top of each other. How many layers can you create? Written instructions are available on our website at https://www.sciencebuddies.org/stem-activities/liquid-stacking-density?ytid=lYITnkFxa5A&ytsrc=description
Science Buddies also hosts a library of…
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