1. Matter and Change Unit 2

2. Matter Matter- anything that takes up space & has mass Matter- anything that takes up space & has mass Properties of Matter (Substance) Properties of Matter (Substance) Mass: amount of matter an object contains Mass: amount of matter an object contains Physical property: quality of a substance that can be seen or measured without changing the substance’s composition, can be used t o identify a substance. Physical property: quality of a substance that can be seen or measured without changing the substance’s composition, can be used t o identify a substance. ColorDensity ColorDensity Solubility (ability to dissolve)Melting point Solubility (ability to dissolve)Melting point OdorBoiling point OdorBoiling point Hardness Hardness

3. Physical Properties of Matter- States of Matter Solid: Solid: matter that has definite volume & shape matter that has definite volume & shape Particles vibrate around a fixed position Particles vibrate around a fixed position Liquid: matter that flows has definite volume, not shape Gas: matter that has no definite volume or shape, takes the shape & volume of its container Moves freely and randomly Plasma: high temperature state where the electrons are pulled away from the nucleus of the atom, called ionized gas Moves freely and randomly

4. States of Matter- What state of matter is represented by each picture?

5. Physical Changes A change in matter that does NOT change the composition of the substance A change in matter that does NOT change the composition of the substance Melting/ Freezing Melting/ Freezing Boiling/ Condensing Boiling/ Condensing CHANGING STATES OF CHANGING STATES OF MATTER IS A PHYSICAL CHANGE!!! Dissolving Dissolving Break/ Cut/ Tear Break/ Cut/ Tear Grind/ Crush Grind/ Crush

6. Chemical Change A change in which one or more substances is changed into a different substance, something new is formed. A change in which one or more substances is changed into a different substance, something new is formed. A chemical reaction A chemical reaction

7. Examples Burn/ explode Burn/ explode Rot/ decompose Rot/ decompose Ferment Ferment Digest Digest Corrode/ rust Corrode/ rust

8. Chemical Properties Ability of a substance to undergo a chemical reaction and form something new Ability of a substance to undergo a chemical reaction and form something new Flammability/ Immflamability Flammability/ Immflamability Reactivity Reactivity Oxidation Oxidation Acidity/ Basicity Acidity/ Basicity

9. Mixtures: physical blend of 2 or more substances Heterogeneous mixture: not uniform in composition, can easily distinguish separate components Heterogeneous mixture: not uniform in composition, can easily distinguish separate components Homogeneous mixture: uniform in composition, cannot see each separate component Homogeneous mixture: uniform in composition, cannot see each separate component

10. Solutions: Some Terms to Know Solute: the stuff that gets dissolved Solute: the stuff that gets dissolved Solvent: the stuff doing the dissolving Solvent: the stuff doing the dissolving

11. Another Name for Homogeneous Mixture → Solutions Types of Solutions (solute-solvent) Types of Solutions (solute-solvent) Gas-Gas: air (CO 2 in N 2 ) Gas-Gas: air (CO 2 in N 2 ) Liquid-Gas: water vapor in air Liquid-Gas: water vapor in air Gas-Liquid: CO 2 in soda Gas-Liquid: CO 2 in soda Liquid-Liquid: vinegar (acetic acid in water) Liquid-Liquid: vinegar (acetic acid in water) Solid-Liquid: salt water Solid-Liquid: salt water Solid-Solid: sterling silver (copper in silver) Solid-Solid: sterling silver (copper in silver)

12. Separating a Mixture 1. Physically removing pieces 1. Physically removing pieces

13. Separating a Mixture Distillation: a liquid is boiled to produce a vapor that is then condensed again to a liquid. Based on a mixture of 2 liquids that have different boiling points. Distillation: a liquid is boiled to produce a vapor that is then condensed again to a liquid. Based on a mixture of 2 liquids that have different boiling points.

14. Separating a Mixture Chromatography: used to separate a mixture in which the components or pigments are 2 or more different colors. Chromatography: used to separate a mixture in which the components or pigments are 2 or more different colors.