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Physical Science Physical Properties. Benchmarks SC.8.P.8.4: Students will classify and compare substances on the basis of their physical properties and.

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Presentation on theme: "Physical Science Physical Properties. Benchmarks SC.8.P.8.4: Students will classify and compare substances on the basis of their physical properties and."— Presentation transcript:

1 Physical Science Physical Properties

2 Benchmarks SC.8.P.8.4: Students will classify and compare substances on the basis of their physical properties and explain that these properties are independent of the amount of the sample. SC.8.P.8.3: Students will describe density and calculate and compare the densities of various materials using the materials’ masses and volumes

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4 Physical Properties Which properties shown above are physical properties? Why are they considered physical? SC.8.P.8.4

5 Practice 1. blue color 2. density, hardness 3. solubility 4.length 5.milk sours Chemical change 6.sour taste Chemical change 7.luster,malleability, conductivity No change 8.melting point, boiling point No Change 9.acids can neutralize bases Chemical change

6 Practice Physical Property- No change 1. blue color 2. density, hardness 3. solubility 4. length 7.luster,malleability, conductivity 8.melting point, boiling point Chemical Properties 5.milk sours Chemical change 6.sour taste Chemical change 9.acids can neutralize bases Chemical change

7 Physical Science Physical vs Chemical Changes

8 Benchmarks SC.8.P.9.2 : Students will differentiate between physical and chemical changes. SC. 8.P.9.1 : Students will explain that mass is conserved when substances undergo physical and chemical changes, according to the Law of Conservation of Mass. SC. 8.P.9.3: Students will describe how temperature influences chemical changes

9 Physical vs. Chemical Change 1.soda releases bubbles 2.water is boiled to create steam 3. iron rusting 4.rotting wood 5.tearing up your textbook 6. pancakes cooking on a griddle 7. grass growing in a lawn 8. food is digested in the stomach 9. Erosion of a riverbed to create the Grande Canyon 10 fireworks exploding 11. Reacts with acid to form H2 12. Reacts with water to form gas 13. Reacts with base to form a water 14. Can neutralize a base

10 Physical vs. Chemical Change 1. soda releases bubbles Physical Change 2.water is boiled to create steam Physical change 3. iron rusting Chemical change 4.rotting wood Chemical change 5.tearing up your textbook Physical change 6. pancakes cooking on a griddle Chemical change 7. grass growing in a lawn Chemical change 8. food is digested in the stomach Chemical change 9. Erosion of a riverbed to create the Grande Canyon Physical change (mostly) 10 fireworks exploding Chemical and physical changes Chemical Changes 11. Reacts with acid to form H2 12. Reacts with water to form gas 13. Reacts with base to form a water 14. Can neutralize a base

11 Physical vs Chemical Changes Which images above are examples of physical changes and which are chemical changes? How do you know? SC.8.P.9.2

12 Conservation of Mass Explain why the total mass is the same before and after the experiment if a gas was formed and inflated the balloon. SC.8.P.9.1

13 Temperature and Chemical Changes What effect did increasing the temperature have on how fast the reaction took place? – The rate of the reaction increases as the temperature increases SC.8.P.9.3

14 Physical Science Elements, Compounds, and Mixtures

15 Benchmarks

16 Atoms and Elements Label the parts of the atoms above. What is the difference between a Carbon atom and a Nitrogen atom? SC.8.P.8.7

17 Elements and Compounds SC.8.P.8.5 Match the elements (in blue) to the compounds (in red) that they create.

18 Element vs. Compound _____HHydrogen _____H 2 Hydrogen gas _____H 2 OWater _____H 2 O 2 Hydrogen peroxide _____HIHydroiodic acid _____CCarbon _____CO 2 Carbon dioxide _____CH 4 Methane _____OOxygen _____O 2 Oxygen gas _____NNitrogen _____N 2 Nitrogen gas _____NH 3 Ammonia _____FFluorine _____F 2 Fluorine gas _____HFHydrofluoric acid _____ClChlorine _____Cl 2 Chlorine gas _____HClHydrochloric acid _____NaSodium _____NaClSodium chloride _____FeIron _____FeCl 2 Iron (II) chloride _____Li 2 CO 3 Lithium carbonate _____KPotassium _____KOHPotassium hydroxide _____NeNeon _____HeHelium _____XeXenon _____ArArgon _____RnRadon _____KrKrypton _____T/FPure substances are either elements or compounds Define atom: _________________________ _________________________ _______________________ ____________________________ _________________________ _________________________ _________ Explain the difference between an element and a compound using the vocabulary term “atom.” ____________________________ _________________________ _________________________ _________

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20 Pure Substances vs Mixtures Pure substances: molecules and compounds make up substances What is the main difference between a compound and a mixture? – Compound is made up of two or more elements that are CHEMICALLY BONDED – Mixtures are combination of substances that are NOT chemically bonded – can be separated by physical means SC.8.P.8.9

21 Heterogeneous vs. Homogeneous Identify each of the following as element, compound, homogeneous or heterogeneous mixture 1.Milk 2.Iron Nail 3. Glass 4.Sugar 5.Bottled spring water 6.Distilled water 7.Air 8.Alloy bicycle frame 9.Propane 10.Baking soda

22 Identify each of the following as element, compound, homogeneous or heterogeneous mixture 1.Milk – heterogeneous mixture of proteins, fat globules, water, and other substances 2.Iron Nail- element 3. Glass- homogeneous mixture of silicone dioxide and other compounds 4.Sugar- compound C6H12O6 5.Bottled spring water- homogeneous mixture of iron and dissolved ions 6.Distilled water- compound 7.Air- homogeneous mixture of many gases 8.Alloy bicycle frame- homogeneous mixtures of many metals 9.Propane- compound of formula C3H8 10.Baking soda- compound NaHCO3 11.Blood- Heterogeneous mixture- RBCs, WBCs, and plasma 12.Window Cleaner- Homogeneous 13.Brass- Homogeneous 14.Olive Oil- Homogeneous 15.Granite- Heterogeneous

23 Most things you encounter everyday are a) Compounds b) Elements c) Mixtures

24 Solution A solution is a homogeneous mixture of two or more substances. A solution may exist in any phase.

25 Solutions SC.8.P.8.9


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