Science

3. A substance with a low pH that can corrode materials is an _________.
5. Metal objects can slowly break down due to _________ when exposed to air and moisture.
6. Lithium and sodium belong to a group known as _________ metals.
7. When oxygen reacts with a substance, a process called _________ occurs.
8. Sand and iron filings form a _________ mixture because they can be separated physically.
11. Iron left outdoors will eventually begin _________ if not protected.
12. Without care, materials can show signs of _________ over time.
13. All matter is made up of basic building blocks called _________.

1. Steel is often protected from rust by applying a _________ coating.
2. Burning fuel releases energy through a process known as _________.
4. Water is an example of _________ made from more than one element.
9. Materials made of only one kind of particle are called _________ substances.
10. A _________ can neutralize an acid in a chemical process.
11. A chemical _________ happens when substances interact to form something new.