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Section 2.1 Outline Matter has observable properties.

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Presentation on theme: "Section 2.1 Outline Matter has observable properties."— Presentation transcript:

1 Section 2.1 Outline Matter has observable properties.

2 I.Physical properties describe a substance. 1) Physical property- characteristic of a substance that can be observed without changing the identity of the substance a) color b) shape c) size d) texture e) volume f) mass

3 A. Physical Properties 1) observing physical properties includes the use of all your senses 2) measuring can be used to determine physical properties

4 A. Physical Properties (cont.) 3) examples that a physical property does not change a substance a) stretching a rubber band b) bending & reshaping clay

5 B.Density 1) measures the amount of matter in a given volume 2) usually labeled g/cm 3 3) D = mass ÷ volume (m/v)

6 B. Density (cont.) 4) Determine the density of a box with a mass of 480 grams and a volume of 60 cm 3

7 C. Physical Changes 1) Physical change – a change in any physical property; not the substance itself

8 C. Physical Changes (cont.) 2) Examples: a) melting ice b) cutting paper in half c) changing wool into a sweater

9 A. Chemical Properties & Changes 1) Chemical property – describes how substances can form new substances

10 A. Chemical props. & changes (cont.) 2) Examples a) Combustibility tells how well something can burn b) Ability to rust

11 A. Chemical props. & changes (cont.) 3) Chemical change – one substance changes into another a) Combination of atoms are rearranged to make new substances

12 A. Chemical props. & changes (cont.) b) examples 1) Piece of wood burning 2) Rusting iron 3) Boiling an egg

13 B. Signs of a Chemical Change 1) If two or more signs are observed, it is most likely a chemical change a) Production of an odor b) Change in temperature c) Change in color d) Formation of bubbles e) Formation of a solid

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