Page 250 - Science Course 1 (Book 1)

Mo6-L7b: What are Substances and Compounds?

SUMMARY
Key Concept How is Matter Classified?
How is Matter Classified?
It is the many kinds of atoms and the ways
What are the classification of matter? they combine that form the different types of
matter.

Mo6-L7b What are Substances and Element
Compounds?
a substance that consists of only one type of atom.
KEY CONCEPTS:
1. How are atoms and elements related?
2. How do elements and compounds differ?

Vocabulary A-Z

Let us learn some vocabulary

Substance
Molecule
matter with a composition that is always the same.
two or more atoms that are held together by covalent
bonds and act as a unit.
A molecule is formed when two or more atoms join
together chemically.
-8 H -8 +8
O
H -8

+8 Molecule Molecule Molecule Atom
-8 and and
compound compound

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