Courtesy of Amanda Slater, Wikimedia Commons
««« By James Palcik
A solution is prepared containing a dye. The dye, methylene blue, is colourless in a reduced state. Upon shaking the solution, the dye is oxidized and displays a blue colour. As the solution stands undisturbed, the dye fades to colourless as it is reduced. The cycle may be repeated over and over.
When molecules collide, chemical reactions can occur — causing major structural changes akin to getting a new arm on your face! George Zaidan and Charles Morton playfully imagine chemical systems as busy city streets, and the colliding molecules within them as your average, limb-swapping joes.
Lesson by George Zaidan and Charles Morton, animation by Neighbor.
For lots more of history’s greatest chemical innovations, check out “The Chemistry Book” by Derek B. Lowe:
It’s an inevitable side effect of longevity: your hair will turn gray. In this episode, Sophia Cai chats about the chemistry of your natural hair color, why it eventually turns white, and how scientists may be able to slow that graying down.
If this episode leaves you wanting more, check out these great resources.
First hair-graying gene identified
A genome-wide association scan in admixed Latin Americans identifies loci influencing facial and scalp hair features
You could call digestion a disassembly line. Your body takes whatever morsel of food you give it, breaks it down, wrings out all the nutrients it can, and discards the waste. It’s an amazing example of chemistry in action, and it happens 24/7. Our body relies on three major types of food: carbohydrates, fats and proteins. In this latest episode of ChemMatters, find out how the body breaks down these big three food groups and puts their nutrients to use.
Honey is great. It’s perfect for drizzling over your toast or stirring into your tea, it’s also the special ingredient in your favorite lip balm. What most people don’t know is that during the trip from the flower in the field to the jar on your table, honey spends an awful lot of time in a bee’s gut.
The reaction of sodium and water can be quite vigorous and potentially dangerous if appropriate safety precautions are not followed. The reaction is also so fast that students often have difficulty observing it. Here’ a slower and more controlled version of the demo that will captivate your students. It’s key ingredient is mineral oil.
By Steve Spangler
Sick Science – Steve Spangler
It’s an awesome new Halloween twist on our Kid-Friendly Elephant’s Toothpaste experiment! With this demonstration, you’ll have an awesome foaming ooze seeping from the face of your jack-o-lantern and squeals of excitement coming from the face of your audience. Continue reading