SC.8.P.8.4 Classify and compare substances on the basis of characteristic physical properties that can be demonstrated or measured; for example,
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2 SC.8.P.8.4 Classify and compare substances on the basis of characteristic physical properties that can be demonstrated or measured; for example, density, thermal or electrical conductivity, solubility, magnetic properties, melting and boiling points, and know that these properties are independent of the amount of the sample. (Also assesses SC.8.P.8.3.) SC.8.P.8.3 Explore and describe the densities of various materials through measurement of their masses and volumes.
3 SC.8.P.8.4 Classify and compare substances on the basis of characteristic physical properties that can be demonstrated or measured; for example, density, thermal or electrical conductivity, solubility, magnetic properties, melting and boiling points, and know that these properties are independent of the amount of the sample. KNOW: 7 Properties- Density, Therm Conductivity, Elect. Cond., Boiling Pt, Melting Pt., Magnetism, Solubility. These are the same no matter how much/little you have. DO: Classify and compare substances by. Calculate using D=m/V. Predict the properties of the same material but different sizes.
4 Definition a characteristic of matter that can be observed without changing the chemical make-up or structure of the substance Density Thermal Conductivity Electrical Conductivity Magnetism Solubility Boiling point Melting point Examples Characteristics Physical Property Can be observed through measurement or observations. Independent of the amount of the substance Reactivity Flammability Non-Examples
5 To arrange into groups Yellow Orange Soft Hard
6 Definition Formula A measure of the matter (mass) inside a certain volume. DENSITY More Dense Picture Less Dense What You are Measuring? Mass (m) Possible Units g, kg Volume (V) ml, cm 3 Density (D) g ml g 3 cm Units
7 Sample Question If an object is less dense than the object it is placed in, it will float.. A student places an object into the liquid which has a density of 0.91g/mL. The sphere is more likely composed of which substance? a) Substance Q b) Substance R c) Substance S d) Substance T
8 Density Sample Question #1: What is the density of a piece of metal if the mass of the metal is 562 grams, and it occupies 44.9mL of space? mass volume What is the density of the metal?
9 What is the density of 48 g of a metal if the metal raises the level of water in a graduated cylinder from 25 ml to 33 ml? 25 ml 33 ml 9
10 Which liquid has the highest density? Which liquid has the lowest density? Which liquid has the middle density? Can you tell the density of something by looking at it?
11 The density of a substance does not change! If you were to break a ruler in half, BOTH pieces will have the same density as the original ruler.
12 Melting Point of Water Boiling Point of Water
13 /watch?v=-uk0z17ssiq Ice melts above 0 C (32 F)
14 The temperature at which a substance changes from a solid to a liquid Melting Point of Water= above 0 C
15
16 om/watch?v=_9mi5bv OmLk Liquid Nitrogen boils at -196 C (-320 F)
17 The temperature at which a substance changes from a liquid to a gas. Water= 100 o C
18
19 A material that allows electricity to pass through it easily.
20 tch?v=5fo0ikutkj0 What substances in the pickle make it a good conductor of electricity?! Ask yourself If I stick this in a wall socket, will it electrocute me?!?!??!
21 Classify the following items as having either good or poor electrical conductors: Copper: Good/Poor Plastic: Good/Poor Water: Good/Poor Wood: Good/Poor Glass: Good/Poor Aluminum: Good/Poor Rubber: Good/Poor
22 A material that allows heat energy to pass through it easily.
23 watch?v=4ryqm-7ftvs Ask yourself, If I touch this substance, will it burn me?
24 Classify the following items as having either good or poor thermal conductors: Steel: Good/Poor Wood: Good/Poor Copper: Good/Poor Cotton: Good/Poor Aluminum: Good/Poor Glass: Good/Poor Rubber: Good/Poor Plastic: Good/Poor
25 Complete the following portions of your Physical Properties of Matter Booklet: Density Melting Point Boiling Point Thermal Conductivity Electrical Conductivity
26 The ability of a substance to be dissolved into another substance.
27 Solute: The substance that is dissolved into the solvent. Solvent: The substance into which the solute is dissolved. Saturation: When no more solute can be dissolved into the solvent. EX.) the Kool-Aid can t dissolve more sugar, so it settles on the bottom.
28 Classify the following items as having either good or poor solubility in water: Salt: Good/Poor Pebbles: Good/Poor Oil: Good/Poor Carbon dioxide: Good/Poor Sand: Good/Poor Grits: Good/Poor Sugar: Good/Poor
29 A non-contact force that pulls on IRON & NICKEL & COBALT from a distance
30 Classify the following items as magnetic or not: Aluminum: Magnetic/Not Iron: Magnetic/Not Plastic: Magnetic/Not Paperclips: Magnetic/Not Lockers: Magnetic/Not Gold: Magnetic/Not Glass: Magnetic/Not
The table below shows some of the properties of the elements cobalt and nickel.
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D =? D = M = 10 g = 5 g/cm 3 M = 10 g V 2 cm 3 V = 2 cm 3 5 g/cm 3
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