# End Show © Copyright Pearson Prentice Hall Properties of Matter > Slide 1 of 26 Describing Matter Describing Matter by using extensive and intensive properties.

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End Show © Copyright Pearson Prentice Hall Properties of Matter > Slide 1 of 26 Describing Matter Describing Matter by using extensive and intensive properties 2.1 Extensive Properties are properties that depend on the amount of matter in a sample. They include mass and volume. The mass of an object is a measure of the amount of matter the object contains. The volume of an object is a measure of the space occupied by the object. Intensive properties depend on the type of matter in a sample, not the amount of matter. The hardness of a boiling ball is an example of an intensive property.

End Show © Copyright Pearson Prentice Hall Properties of Matter > Slide 2 of 26 Identifying Substances Why do all samples of a substance have the same intensive properties? 2.1 Matter that has a uniform and definite composition is called a substance. This sculpture of a falcon is made of gold. Gold is an example of a substance. Every sample of a given substance has identical intensive properties because every sample has the same composition.

End Show Slide 3 of 26 © Copyright Pearson Prentice Hall Properties of Matter > Identifying Substances A physical property is a quality or condition of a substance that can be observed or measured without changing the substance’s composition. Hardness, color, conductivity, and malleability are examples of physical properties. 2.1

End Show © Copyright Pearson Prentice Hall Properties of Matter > Slide 4 of 26 States of Matter What are three states of matter? __________________ 2.1

End Show Slide 5 of 26 © Copyright Pearson Prentice Hall Properties of Matter > States of Matter Solids A solid is a form of matter that has a definite shape and volume. 2.1

End Show Slide 6 of 26 © Copyright Pearson Prentice Hall Properties of Matter > States of Matter Liquid A liquid is a form of matter that has an indefinite shape, flows, yet has a fixed volume. 2.1

End Show Slide 7 of 26 © Copyright Pearson Prentice Hall Properties of Matter > States of Matter Gases A gas is a form of matter that takes both the shape and volume of its container. 2.1 Vapor describes the gaseous state of a substance that is generally a liquid or solid at room temperature, as in water vapor.

End Show © Copyright Pearson Prentice Hall Properties of Matter > Slide 8 of 26 Physical Changes How can physical changes be classified? 2.1

End Show Slide 9 of 26 © Copyright Pearson Prentice Hall Properties of Matter > Physical Changes During a physical change, some properties of a material change, but the composition of the material does not change. As gallium melts in a person’s hand, the shape of the sample changes, but the composition of the material does not change. 2.1

End Show Slide 10 of 26 © Copyright Pearson Prentice Hall Properties of Matter > Physical Changes Physical changes can be classified as reversible or irreversible. All physical changes that involve a change from one state to another are reversible. Cutting hair, filing nails, and cracking an egg are examples of irreversible physical changes. 2.1

End Show © Copyright Pearson Prentice Hall Slide 11 of 26 Section Quiz -or- Continue to: Launch: Assess students’ understanding of the concepts in Section 2.1 Section Quiz. 2.1.

© Copyright Pearson Prentice Hall Slide 12 of 26 End Show 1.Which of the following would be described as an extensive property of matter? a.temperature b.color c.mass d.hardness 2.1 Section Quiz.

© Copyright Pearson Prentice Hall Slide 13 of 26 End Show 2.1 Section Quiz. 2.Which properties can be observed without changing the composition of a substance? a.all properties of a substance b.intensive properties c.chemical properties d.physical properties

© Copyright Pearson Prentice Hall Slide 14 of 26 End Show 2.1 Section Quiz. 3.Match the states of matter with the following descriptions: (1) takes the volume and shape of its container (2) has a definite shape and volume (3) has a definite volume but an indefinite shape a.(1) liquid, (2) solid and (3) gas b.(1) gas, (2) solid, and (3) liquid c.(1) gas, (2) liquid, and (3) solid

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