Magnetite

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/magnetite

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. What is the chemical formula?Fe3O4 (Iron(II,III) oxide)
2. What is the crystal system?Cubic (Spinel group)
3. What is magnetite and why is it called a magnetic rock?Magnetite is a black, shiny mineral made of iron and oxygen. It is the strongest naturally occurring magnetic material, so it can pull metal objects toward it.
4. How does magnetite get its magnetic power?Inside its crystal, iron atoms are arranged so that some point one way and others point the opposite way. The imbalance of these points gives magnetite a net magnetic pull.

Ferrimagnetism: A form of magnetism characterized by antiparallel alignment of magnetic moments, resulting in a net magnetic moment and strong attraction.
Spinel Group: A class of minerals with a characteristic cubic crystal structure, of which magnetite is a prominent member.
Paleomagnetism: The study of the record of the Earth's magnetic field in rocks, providing insights into geological history and plate movements.
Thermoremanent Magnetization: Magnetization acquired by a rock when it cools through its Curie temperature in the presence of a magnetic field.