Oxide

The video explains that both water (H2O) and rust (iron oxide) are oxides. It highlights that a significant portion of the Earth's crust is made up of oxides, with silicon dioxide being the most prevalent, followed by aluminium oxide and other metal oxides.

What are the two main components mentioned in the text that are classified as oxides?

What percentage of the Earth's crust is composed of silicon dioxide?

What is the main constituent of sand and quartz?

What is the approximate percentage of aluminium oxide in the Earth's crust?

What does the remainder of the Earth's crust mainly consist of?