Section 1 Composition of Matter

Section 1

Composition of Matter

Essential Questions

What are the differences between substances and mixtures? How are elements and compounds identified? How are suspensions, solutions, and colloids related?

Review Vocabulary

property: characteristic or essential quality

New Vocabulary

substance element compound heterogeneous mixture suspension

colloid Tyndall effect homogeneous mixture solution

Substances

Recall that matter is anything that takes up space and has mass. Everything around us is matter, including things that we cannot see--like the salt in a pail of ocean water. Matter is either a pure substance or a mixture of substances. A pure substance, or simply a substance, is a type of matter with a fixed composition. A substance can be an element or a compound. Some substances you might recognize are helium, aluminum, water, and salt.

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