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The Chemistry of Cooking: Physical and Chemical Reactions
Have you ever wondered why your pancake batter changes from a liquid to a fluffy solid when it s cooked? This is because of chemical and physical reactions. When you mix flour, eggs, and milk, they form a new substance - pancake batter. This is a physical reaction. But when you cook the batter, it changes color and texture. This is a chemical reaction, where heat causes the ingredients to form new substances that make delicious pancakes. So the next time you re cooking, remember, there s a lot of science in every dish!
Question 1
What happens when you mix flour, eggs, and milk?
They form a pancake
They create a chemical reaction
They form pancake batter
Explanation. When you mix flour, eggs, and milk, they form a new substance - pancake batter. This is a physical reaction.
Nothing happens
They form a physical reaction
Question 2
What type of reaction occurs when you cook the pancake batter?
Physical reaction
Chemical reaction
Explanation. When you cook the batter, it changes color and texture. This is a chemical reaction, where heat causes the ingredients to form new substances.
No reaction
Electrical reaction
Magnetic reaction
Question 3
What happens during a chemical reaction in cooking?
The ingredients stay the same
The ingredients create heat
The ingredients form new substances
Explanation. During a chemical reaction in cooking, heat causes the ingredients to form new substances.
The ingredients disappear
The ingredients freeze
Question 4
What type of reaction occurs when flour, eggs, and milk are mixed?
Chemical reaction
Physical reaction
Explanation. When flour, eggs, and milk are mixed, they undergo a physical reaction forming a new substance - pancake batter.
Electrical reaction
Magnetic reaction
No reaction
Question 5
What is the end product after the chemical reaction during cooking?
Pancake batter
Raw pancake
Delicious pancakes
Explanation. After the chemical reaction during cooking, the end product is delicious pancakes.
Liquid batter
Eggs and flour
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