Question 1

What is cooking in chemistry terms?

Accepted Answer

When you cook, you are changing the food's chemical makeup. Heat changes raw ingredients and makes them taste different and easier to eat.

Question 2

Why does bread rise when you bake it?

Accepted Answer

Bread rises because of a tiny living thing called yeast. Yeast makes bubbles of gas that get trapped in the dough, making it fluffy.

Question 3

What happens when you boil an egg?

Accepted Answer

Boiling an egg changes the egg whites and yolk from runny to solid. The heat makes the proteins in the egg stick together, making it hard.

Question 4

Why do onions make you cry?

Accepted Answer

When you cut an onion, it releases a gas. This gas can irritate your eyes and make them tear up.

Question 5

How does sugar turn into caramel?

Accepted Answer

When you heat sugar, it melts and then starts to turn brown and changes flavor. This process is called caramelization.

Question 6

Why does popcorn pop?

Accepted Answer

Inside each popcorn kernel is a bit of water. When the kernel is heated, the water turns into steam, and the pressure makes the kernel explode.

Question 7

What makes ice cream smooth and creamy?

Accepted Answer

Ice cream is smooth and creamy because of the tiny ice crystals and lots of mixing. The mixing breaks up the ice and makes everything blend nicely.

Question 8

Why does meat turn brown when you cook it?

Accepted Answer

When you cook meat, the heat changes its proteins, which makes it turn brown. This process also adds a delicious flavor.

Question 9

How does baking soda help cookies rise?

Accepted Answer

Baking soda releases gas bubbles when it heats up and mixes with wet ingredients. These bubbles make the cookies light and fluffy.

Question 10

Why does cutting an apple make it go brown?

Accepted Answer

When you cut an apple, it reacts with the air. This reaction changes the color of the apple to brown.

Question 11

What makes chili peppers hot?

Accepted Answer

Chili peppers have a substance called capsaicin. This substance is what makes your mouth feel hot when you eat them.

Question 12

What role does salt play in cooking?

Accepted Answer

Salt makes food taste better by bringing out other flavors. It also helps preserve food by stopping bacteria from growing.

Question 13

Why do cakes need eggs?

Accepted Answer

Eggs help hold all the cake ingredients together. They also trap air, which helps the cake rise and become fluffy.

Question 14

How does pickling work?

Accepted Answer

Pickling uses vinegar or brine to preserve and flavor food. The acid in the vinegar stops bacteria from spoiling the food.

Question 15

Why does garlic get sticky when you chop it?

Accepted Answer

When you chop garlic, it releases some chemicals that are sticky. These chemicals make the garlic pieces stick together.

Question 16

What happens when you roast marshmallows?

Accepted Answer

Roasting marshmallows melts the sugars and turns them brown. They become soft, gooey, and yummy.

Question 17

Why is yeast important in baking bread?

Accepted Answer

Yeast is important because it makes bread dough rise. It creates air bubbles that make the bread light and fluffy.

Question 18

How does pressure cooking work?

Accepted Answer

Pressure cooking uses steam trapped under pressure to cook food faster. The high pressure raises the boiling point of water, making things cook quicker.

Question 19

Why do we need to preheat ovens?

Accepted Answer

Preheating an oven means it reaches the right temperature before you put food in. This helps the food cook evenly and properly.

Question 20

Why do we add lemon juice to apple slices?

Accepted Answer

Lemon juice slows down the browning of apple slices. Its acid keeps the apple looking fresher for longer.

The Chemistry of Cooking: Exploring Scientific Principles in the Kitchen - 20 FAQs Explained Simply