monday 10/07/13 1.how can a substance be indentified? by physical and chemical properties
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Monday 10/07/131. How can a substance be indentified?By physical and chemical properties
Tues 10/82. What measurements are needed to find density?Mass = grams (g)Volume = ml ( liquid ) cm3 (solid)Density = Mass /Volume
Thur 10/103. List evidence of a chemical change or reaction.Color change(?) rust corrode oxidizeGasLightPrecipitate Temperature
Fri 10/114. Physical or ChemicalP
C
C
P
Tue 10/15
5. Element or Compoundcompound
Wed 10/166.
Thursday 10/177. Elements in each?OceansLiving matterAtmosphereEarth’s crust
Thursday 10/17Elements in each?Oceans – H,O,NaClLiving matter – C, H, O, Atmosphere – N, O, CO2Earth’s crust - O, Si, Fe
Thursday 10/177. Chemical or physical properties• state at room temperature • melting point • freezing point • color • density /specific gravity • solubility • conductivity • magnetic
Fri 10/18
8. Where are the metals, non-metals, and metalloids located on the periodic table?
MetalsNon-metalsMetalloids
Mon 10/21
9. Find the density.
25 g
Tue 10/22
10. Name a physical property of a metal.ConductorShiny luster
Wed 10/23
11.A bar of soap is 12 cm tall, 6 cm wide, and 10 cm long. It has a mass of 415 grams. What is the density of the bar of soap. (round to 2 places behind the decimal point)
D=M/V12cmx6cmx10cm=720 cm3
D=415g / 720cm3
D=0.58 g/cm3
Thur 10/24
12. What mineral is it? Mass 96.5 g, volume 5 cm3, has shiny luster, and malleable. Use P. 607
19.3 g/cm3Gold
• Today 30,000 per kg• $7,500,000
Density
Periodic table
Minerals
Energy
Energy Transformations
Heat transfer
Movement of heat
Chemical change
D = M/V
D = _____ g/cm3 (solids)D = _____ g/ml (liquids)
Grams/ balance - scaleVolume/ LxWxH - rulerVolume/ displacement (graduated cylinder)
Minerals
Solid NaturalInorganicCrystal structureChemical formula
How to indentify:Hardness- mohs scale 1-10Color – sometimesStreak – color of powderLuster – metallic or non metallicDensity and fracture
Conductor - electricityMalleable – hammer• Ductile – bendLuster – shiny, dullSemi-conductor - metalloids
Label , color, list metalloids.
Conductor - electricityMalleable – hammer into sheetsDuctile – bend, without breakingLuster – shiny, dullSemi-conductor - metalloids
1. B2. D3. C4. D5. B6. B7. B8. B9. D10. 3
11. A or D12. B13. B or C14. B15. B16. A17. D18. A19. A20. C
1. Work on cut and paste2. Copy picture below , use plain paper
Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?
a) burning the sugar cube with a matchb) crushing the sugar cube and dissolving it in waterc) dehydrating the sugar cube with sulfuric acidd) chewing the sugar cube and digesting it
Common ElementsWhat common elements are in each? Draw something , and circle the elements that will help you remember.
1. Atmosphere 2. Living matter
3. Earth’s crust 4. Oceans
19. Label the graphs.
Atmosphere Earths Crust Oceans
1. ____________ glass breaking ____________ mixing salt and water2. ____________ hammering wood together 11. ____________ mixing oil and water3. ____________ a rusting bicycle 12. ____________ water evaporating4. ____________ melting butter 13. ____________ cutting grass5. ___________ separate sand from gravel 14. ____________ burning leaves6. ____________ bleaching your hair 15. ____________ fireworks exploding7. ____________ frying an egg 16. ____________ cutting your hair8. ____________ squeeze oranges for juice 17. ____________ crushing a can9. ____________ melting ice 18. ____________ boiling water
Common ElementsWhat common elements are in each? Draw something , and circle the elements that will help you remember
1. Atmosphere
NOCO2
2. Living matter
OCH
3. Earth’s crustOSiFe
4. Oceans HONaCl
Title Physical vs. Chemical
1. Physical properties p. 262. Physical change p. 303. Chemical properties p. 264. Chemical change p. 31
1. A physical property is a characteristic of a substance that can be observed without changing the substance into something else.
2. physical change - change that alters the form or appearance of a material but does not make the material into another substance.
3. Chemical Property - is a characteristic that is observed when a substance interacts with another substance. Ex: matches will burn
4. Chemical Change - occurs when a substance combines with another to form a new substance Ex: Match burning
5.
6.
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• A. Physical properties - A quality or condition of a substance that can be observed or measured without changing the substance's condition. some examples:
• state at room temperature • melting point • freezing point • color • density /specific gravity • solubility • conductivity • magnetic
• 2. All substances have definite properties,• A. Physical properties / physical change - "things it can do alone" definition - A quality or condition of a substance that can be observed or measured without changing the
substance's condition. some examples:• state at room temperature • melting point • freezing point • color • density /specific gravity • specific heat • polarity • solubility • conductivity • magnetic • malleability • Substances that are combined without reacting are called mixtures, to learn more about mixtures.• Substances that react to one another and chemically bond are called elements or compounds.• B. Chemical properties / chemical change - "it takes two to tango"• definition - How a substance reacts to other substances. When one or more substances react they become a third, unique, substance often with new physical and chemical
properties. some examples:• oxidation - rusting or burning • flammability • in a chemical reaction there are reactants and products, these occur in definate proportions. • chemical reactions are predictable and repeatable• there are also definate clues that a reaction has taken place including:• change in physical properties • color change • gas given off • temperature change • Law of conservation of matter / mass • Matter can never be created nor destroyed. All matter that is present before a chemical reaction occurs is also present after the reaction, although it may be in a new compound.