Microwave oven

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/microwave-oven

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. Who discovered Microwave oven?1945
2. What is the discoverer?Percy Spencer
3. What is the operating frequency?Typically 2.45 GHz
4. How does a microwave oven cook food?It uses a magnetron to create microwaves that make water molecules in food vibrate, producing heat that cooks the food from inside.
5. Why did Percy Spencer invent the microwave oven?He noticed a candy bar melt while working with a magnetron and realized microwaves could cook food.

Dielectric Heating: The process of heating a dielectric material by exposing it to an alternating electromagnetic field.
Magnetron: A high-powered vacuum tube that generates microwave radiation.
Polar Molecules: Molecules with an uneven distribution of electrical charge, causing them to have a positive and negative end.
Penetration Depth: The distance into a substance that electromagnetic waves can travel before their intensity is significantly reduced.