Chemical Building Blocks Chapter 1.1 (pgs 14-21) Matter Chemical Building Blocks Chapter 1.1 (pgs 14-21) Have students consider what matter is Possible group discussion, then hear suggestions How would you describe matter? What are characteristics of different objects If time stretch needed, States of Matt video

What is Matter? ?

Matter… Is anything that has mass and occupies space Has different states… Solid Liquid Gas Plasma Possesses characteristic properties All diamonds have the same hardness.

Solid Molecules are in fixed positions Definite volume and shape

Liquid Molecules are loosely connected Definite volume, indefinite shape Takes the shape of the container

Gas Molecules are as far apart as possible No definite volume or shape Will fill all available space

Plasma Plasma can be considered as a gas of highly ionized particles Exists at temperatures of several thousand degrees Celsius Unlike gases, respond to electromagnetic forces.

Plasma Examples include charged air after lightning and stars like our Sun.

Plasma… TV How Plasma TVs work.

States of Matter Another characteristic property that matter of the same type shares is temperature Boiling Point: temperature at which a liquid boils (bubbles) Melting Point: temperature at which a solid melts (thaws).

Boiling / Condensation Types of Change Ice Water Water Vapor Deposition / Sublimation Melting / Freezing Boiling / Condensation

Types of Change Physical: Chemical: Changing the appearance of an object Ripping paper in half, crushing a can Chemical: Changing the composition of an object so that its initial components can not be retrieved Burning wood, fireworks exploding.

Physical or Chemical? Cooking an egg – Chemical change

Physical or Chemical? Sawing a tree – Physical change

Physical or Chemical? Dissolving salt in water – Physical change

Physical or Chemical? Rusted iron pan – Chemical change

Physical or Chemical? Ice Melting – Physical change

Mixtures & Compounds Mixture: two or more substances that are mixed, but not chemically combined Solution is a mixture that appears to be a single substance.

Mixtures & Compounds Pure Substance: made of only one kind of matter with definite properties Water from the tap, ocean, or in your blood is the same Elements are pure substances.

Mixtures & Compounds Compounds: a pure substance (elements) that are chemically combined Water Carbon Dioxide Salt Sugar … H2O … CO2 … NaCl … C12H22O11

Matter can not be created Matter can not be destroyed Changed, but Unchanged Matter can not be created Matter can not be destroyed

Due: Friday, September 16th What to Work On Read pages 14 – 21 in text Section Review questions on page 21 (#’s 1-5) Due: Friday, September 16th