1. Chapter 2: Lesson 1&2 What are physical and chemical changes? By: Devon

2. Physical Changes  Physical changes are in size, shape, volume, and state of matter.  Sawing wood, shredding paper, and melting wax are all physical changes. Copper can be hammered into sheets, and gemstones carved into beautiful shapes as a result.  In each case, the substance does not change into something else.

3. Chemical changes  A chemical change occurs when one kind of matter changes into another type of matter with different properties.  Cooking a potato is one example of a chemical change. So is rusting iron.  It’s not always easy to tell when a chemical reaction occurs. Changes can cause heat, light, sound, and fizzing.

4. States of Matter StateExample SolidIcewoodGold LiquidWateriodineMercury GasAirHeliumNitrogen The three types of matter: Solid, Liquid, Gas The states of matter are called physical property.  Examples

5. Melting MaterialMelting Temperature Oxygen-218 Nitrogen-210 Mercury-39 Sugar146 Aluminum660 Gold1063 Nickel1453 Iron1535 Tungsten3410 Each object reaches a point where it turns from a solid to a liquid or solid to gas or liquid to gas. That is a melting point. Each melting point is different.

6. Thank you for watching!!!!!!!!!!!!