Classify the following as physical changes and which are chemical changes ? (i) cooking of food (ii) Boiling of water (iii) Cutting of tress (iv) Dissolving salt in water (v) Digestion of food (vi) Meltig of ice
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Did you know that the formation of bread crusts has been studied for over 100 years?

Equipment: toaster, frying pan, bread, vegetable oil, potatoes.

If you toast a slice of bread for a minute, it turns out golden and crisp. When you peel some potatoes and fry them in a greased frying pan, they also turn a beautiful golden-brown after a while. Why?

All foods contain proteins and carbohydrates. When heated, these compounds partially decompose to amino acids and sugars. Amino acid molecules contain special fragments (amino groups), as do sugars (aldehyde groups). Due to these fragments, amino acids and sugars react in what is known as the Maillard reaction to form hundreds of new compounds, which are responsible for the crispness and pleasant aroma of cooked food. This reaction has been studied for more than a hundred years, but the exact compositions of all the products of this reaction have not yet been established.

Cool and safe experiments await you in the MEL Chemistry subscription!

Warning! Only under adult supervision
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How making pancakes can make a physical and chemical change.

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We’ve talked about mixtures and solutions, solutes and solvents, but what about things that can’t be undone? What about Chemical Changes? Would it surprise you to know that baking a cake is a Chemical Change? Or striking a match? In this episode of Crash Course Kids, Sabrina talks to us about how to tell if you have a chemical change on your hands.

This first series is based on 5th grade science. We’re super excited and hope you enjoy Crash Course Kids!

///Standards Used in This Video///
5-PS1-4. Conduct an investigation to determine whether the mixing of two or more substances results in new substances.

Want to find Crash Course elsewhere on the internet?
Crash Course Main Channel: https://www.youtube.com/crashcourse
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Twitter – http://www.twitter.com/thecrashcourse
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Producer & Editor: Nicholas Jenkins
Cinematographer & Director: Michael Aranda
Host: Sabrina Cruz
Script Supervisor: Mickie Halpern
Writer: Jen Szymanski
Credits…

Executive Producers: John & Hank Green
Consultant: Shelby Alinsky
Script Editor: Blake de Pastino

Thought Cafe Team:
Stephanie Bailis
Cody Brown
Suzanna Brusikiewicz
Jonathan Corbiere
Nick Counter
Kelsey Heinrichs
Jack Kenedy
Corey MacDonald
Tyler Sammy
Nikkie Stinchcombe
James Tuer
Adam Winnik
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