Aluminium oxide

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/aluminium-oxide

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. How tall is Aluminium oxide?Alpha-aluminium oxide (α-Al2O3)
2. What is the chemical formula?Al2O3
3. What is the natural mineral form?Corundum
4. What is aluminium oxide and why is it called alumina?Aluminium oxide is a strong, sparkly material made of aluminium and oxygen atoms. It is also called alumina because that is its common name.
5. How do rubies and sapphires get their colors?Tiny impurities give them color. Chromium makes rubies red, while iron and titanium give sapphires blue.

Polymorphic Phases: Different crystal structures that a chemical compound can adopt.
Hall-Héroult Process: The industrial method used to produce aluminium metal from alumina.
Refractory Material: A material capable of withstanding extremely high temperatures without significant degradation.
Dielectric Strength: The maximum electric field a material can withstand without breaking down.