Level 1
All matter is made of tiny particles called
atoms
When atoms join together, they form ___.
molecules
H₂O is the ___ for water.
formula
Rust is made from ___ and ___ joining together.
iron and oxygen
H is the symbol for ___.
hydrogen
Every element has a ___.
symbol
Water is an example of a ___.
compound
Burning is an example of a ___ reaction.
chemical
O is the symbol for ___.
oxygen