Activity 14

Title: Physical and Chemical Properties of Materials

Read B-14

Challenge: How do the properties of materials determine their uses?

Hypothesis/Initial Thoughts:

Background:Physical Chemical

Properties Definition

Examples of Properties

Change Definition

Examples of Change

Can be determined without seeking a chemical reaction. It is a quality or trait that describes a material or object

• Color• Hardness• Texture• Light transmission• luster

A physical change occurs when a substance changes its state (solid, liquid, gas) or when it is broken into smaller pieces or combined into larger ones.

• Cut/smash/fold • Evaporate/boil

Can only be determined by adding another chemical to see if a reaction occurs

• Reaction with hydrochloric acid (HCL)

A change in how atoms or molecules are bonded to each other, resulting in a new arrangement of atoms or molecules. A chemical change always results in changed physical properties

• Iron rusting• An acid dissolving a metal• Wood burning• An egg becoming hard boiled