Matter– & Matter – anything that takes up space & has mass .
What is Matter? Matter Anything that has mass and takes up space. Remember mass is measured in grams...
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Transcript of What is Matter? Matter Anything that has mass and takes up space. Remember mass is measured in grams...
![Page 1: What is Matter? Matter Anything that has mass and takes up space. Remember mass is measured in grams and taking up space is a measurement of volume (which.](https://reader030.fdocuments.in/reader030/viewer/2022032706/56649de35503460f94ada433/html5/thumbnails/1.jpg)
What is Matter?
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Matter
• Anything that has mass and takes up space.• Remember mass is measured in grams and
taking up space is a measurement of volume (which is a derived unit)
• Matter is composed of tiny particles that are always in constant motion
• Examples: Salt, wood, atom, insect• Matter can be described as either a pure
substance or a mixture.
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States of Matter
• Solids have very little particle movement (simple vibration back and forth). Solids have definite volume and shape. Solids are also hard to compress.
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States of Matter
• Liquids have moderate particle motion. The particles of a liquid can easily slide past one another. Liquids have definite volume, but take the shape of their container. Liquids are hard to compress because their particles are close together.
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States of Matter
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Gases Continued• There is a difference between what is called a gas
and a VAPOR.• Vapors are the gaseous state of a substance that is a
solid or liquid at room temperature.• For example, steam is a vapor because water exists
as a liquid at room temperature.
Water vapor
Carbon dioxide gas
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Properties of Matter
• Physical Properties- are properties that can be OBSERVED without changing the substance.
• Examples: Shape, color, texture, weight, density, odor, hardness, melting point, and boiling point
• Extensive Physical Properties-dependent on the amount of the substance. Examples: Length, volume
• Intensive Physical Properties- independent of the amount of the substance. Examples: Density, color, odor
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Chemical Properties
• Chemical Property- ability of a substance to chemically combine with another substance or to change into one or more new substances.
• The inability of a substance to change is also a chemical property (resisting change)
• Examples: Rusting, flammability, baking,
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Identify the list below as either a Physical or Chemical Property
• Red hair dye• A ring turns your finger
green• A hammer left outside
in the rain will rust• Sam weighs 130 lbs• Basketballs are spheres• Peroxide bubbles when
it comes in contact with an infection
• The density of water is 1 g/mL
• The air freshener smells like pears
• Paper burns• Tin has a silver color• Water boils at 1000C• Candle wax melts• Gun powder lights up
the sky in firecrackers
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Changes in Matter
• Physical Changes-a change that does not alter the composition or identity of the substance
• Example: cutting paper, Hair dye, shattering glass
• ALL PHASE CHANGES ARE PHYSICAL CHANGES
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Phase Changes
• Melting- Solid Liquid• Freezing- Liquid Solid• Evaporation, Vaporization, Boiling-
Liquid Gas• Condensation- Gas Liquid• Sublimation- Solid Gas• Deposition- Gas Solid
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Changes in Matter
• Chemical Changes-when one or more substances change to become NEW substances
• Also called a chemical reaction.
• Baking produces a chemical change
• Terms that indicate a chemical change include: decompose, explode, rust, oxidize, corrode, tarnish, ferment, burn, or rot
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Mixtures of Matter
• Physical combinations of two or more substances (no chemical reactions occur)
• Mixtures can be either homogeneous (same throughout) or heterogeneous (different)
homogeneous heterogeneous heterogeneous
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Heterogeneous Mixtures
• Mixtures that do not blend together. The parts of the mixture remain separate and do not mix well.
• Examples: Italian Dressing, Pizza, cereal, muddy water, OJ with pulp
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Homogeneous Mixtures• Mixtures that look the
same from top to bottom. They have a uniform appearance.
• They are also called solutions
• Solutions can be made of mixtures of solids, liquids and gases
• A solution made up of two solid metals is called an alloy
Examples: • Steel (iron and carbon)
• Hairspray (liquid and gas)
• Lemonade (solid and liquid)
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Identify the type of Mixture
• Flat soda• Cherry vanilla ice cream• Salad dressing• Salt water• Soil• Gunpowder• Black coffee• Sugar water
• City air• Paint• Rubbing Alcohol• Brass• Beach sand• Pure air• Spaghetti sauce
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Pure Substances
• A substance that cannot be separated into simpler substances by physical means
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Pure Substances
• Element- the simplest form of matter
• Made up of only one type of atom
• 92 naturally occurring elements
• Examples: gold, silver, oxygen, mercury
• Compound- two or more atoms chemically combined. Compounds act together as a unit called a molecule.
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Compounds
• Compound properties are never the same as the individual element’s properties.
• Example- NaCl: Na is explosive and Cl is toxic but put together it is edible
Sodium Chlorine Table salt
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Making Compounds
• They must always combine in definite proportions
• The proportions are determined by the number of chemical bonds that can be formed by each atom.
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Representing Compounds
• Compounds are represented by chemical formulas.
• A formula indicates the number and kind of atoms making up a compound.
• For example: H2O consists of 2 hydrogen atoms and 1 oxygen atom.
MgSO4 consists of 1 magnesium atom, 1 sulfur atom, and 4 oxygen atoms.
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Identify the Type of Substance
• Na• H20
• CuCl2
• O2
• Sn• CO2
• FeF3
• B
• Cobalt• Xenon hexafluoride• Gold• Lithium• Zinc nitrate• Hydrochloric acid• Mercury• krypton
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Separating Mixtures
• Because mixtures are not chemically combined they can be separated by physical means like:
• Filtration• Distillation• Crystallization• Chromatography• Evaporation to Dryness
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Separating Compounds
• Chemical means must be used to separate compounds
• External energy must be used to separate. The energy could be heat or electricity
• Example: Electrolysis- electricity is used to split a water molecule to produce hydrogen and oxygen gas.
• 2H20 ---------> 2H2 + O2
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How would you separate these mixtures?
• Sand and water• Sugar and water• Oil and water• Sand and gravel• Mixture of heptane (BP 980C) and heptanol (BP 1760C)• Mixture of iodine solid and sodium chloride (Hint:
Iodine is not soluble in water)• Hydrogen from oxygen in water• Mixture of lead and aluminum• Mixture of salt and iron filings• Sodium from chlorine in salt
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Review• Identify the following as a
physical or chemical change
1. Sodium hydroxide dissolves in water
2. A pellet of sodium is sliced in two
3. Water is heated and changed to steam
4. Wood rotting5. A tire is inflated with air
• Identify the following as a physical or chemical property
1. Blue color2. Flammability3. Density4. Solubility5. Sour taste6. Reacts with an acid to
form water7. Melting point