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55 Cards in this Set
- Front
- Back
A long coil of wire with many loops is called an:
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SOLENOID
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What is a characteristic property of an element
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BOILING POINT
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An electromagnet is weakened by
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DECREASING THE CURRENT
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The density of an object with a mass of 25 grams and volume of 5 ml is:
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5 g/ml
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An unchanging measurement of the amount of matter an object contains is its:
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DENSITY
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Matter is what:
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THE STUFF THAT MAKES UP EVERYTHING IN THE UNIVERSE
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What are the three principal states of matter:
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SOLIDS
LIQUIDS GASES |
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Characteristic property:
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Is a property that always holds true for a particular kind of matter.
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For a given substance, characteristic properties never change:
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They can be used to identify unknown matter.
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Boiling point is the temperature at which?
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Liquid Boils
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Boiling point is a what type of property:
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Characteristic
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Chemical Changes occur:
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When one or more substances combine or break apart to form a new substance.(example heating sugar changes it to caramel)
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The ability of a substance to undergo a specific chemical change is called:
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CHEMICAL ACTIVITY
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Matter can be classified into two general categories:
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Mixtures and Pure substances. The pure substances include elements and compounds.
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A "________" consists of two or more substances that are in the same place but are not chemically combined.
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MIXTURE
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A "________" is the best mixed of all possible mixures:
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SOLUTION
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A "_________" is made of only one kind of matter and has definite properties.
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PURE SUBSTANCE
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"_________" are pure substances that cannot be broken down into other substances by any physical or chemical means:
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ELEMENT
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A "__________" is a pure substance made of two or more elements that are chemically combined.
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COMPOUND
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Compounds always have properties that are "_______" from the properties of the elements that formed them. Water is an example of a compound.
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DIFFERENT
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An importanat characteristic property of matter is its "______".
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DENSITY
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Density relates to what two items of a object:
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MASS
and VOLUME |
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To calculate the density of a sample, divide its "____" by its "______"
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MASS by its VOLUME
Density = Mass/Volume |
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A typical unit of density is written as:
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g/cm3 which is read as grams per cubic centimeter
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For liquids, density is often given in :
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grams per milliliter or g/mL
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Ice Floats in in Liquid Water because:
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Ice is less dense than water
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What is the density of a object that has a mass of 10mg and a volume of 5 mL
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=10mg/5mL
2 mg/mL |
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An "_________" is a substance that cannot be broken down into any other subtances by chemical or phyiscal means:
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ELEMENT
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A " ______" is a substance made of two or more elements chemically combined in a specific ratio or proportion.
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COMPOUND
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A "_____" is a well mixed mixture, like salt water.
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SOLUTION
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"_______" is the study of the properties of matter and how matter changes.
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CHEMISTRY
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PHYSICAL CHANGE
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A change that alters the form or appearance of a material but does not make the material into something different.
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CHEMICAL CHANGE
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A change in matter that produces new substances is call CHEMICAL CHANGE
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A chemical change is like :
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scrambling the letters of a word to make new words
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One way to detect chemical reactions is to observe changes in the properties of the matter. Such as:
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Might see bubbles in a liquid when gas is produced. Or a solid may appear when solutions are mixed.
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A solid that forms from solution during a checical reaction is called a :
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PRECIPITATE
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The smallest particle of a element is a "____".
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ATOM
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What is the combination of two or more atoms?
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MOLECULE
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CHEMICAL BOND
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Is the force that holds atoms together.
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Chemical reactions occur when chemical bonds are "_______"
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either formed or broken apart
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A state of matter that has a definite shape or volume.
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SOLID
example: Rock, Pencil, Desk |
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No Definite shape and definite volume
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LIQUID
example: water, soda Lemonade |
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No definite shape and no definite volume
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GAS
example: steam, fog |
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Substance in which the component are not evenly mixed:
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HETEROGENEOUS
example: salads, rock, graphite |
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Substance in which the component are evenly mixed:
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HOMOGENEOUS
example: paint, milk |
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Mixture in which particles are mixed but not dissolved
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COLLOIDS
example: Jellow, mayo, milk |
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Mixture in which some particles settle out:
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SUSPENSION
example: water, dust, air |
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Well mixed mixtures in which particles are small and dissolved
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SOLUTIONS
example: salt water, juice, tea |
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ELEMENTS cannot be broken into other substances by chical or physical means:
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Example: iron, copper, oxygen
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COMPOUNDS A substance made of two or more elements chemically combined
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Example: water, carbon dioxide, table sugar
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A bicycle left out in the rain begins to rust is a Chemical or Physical Change.
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CHEMICAL
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A copper wire is cut into five smaller pieces is a Chemical or Physical Change.
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PHYSICAL CHANGE
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A match burns, leaving only a charred stick of wood is a Chemical or Physical Change.
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CHEMICAL
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Antifreeze is added to a car radiator to lower the freezing point is a Chemical or Physical Change.
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PHYSICAL CHANGE
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Leaves of a maple tree turn bright red as winter approaches is a Chemical or Physical Change.
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CHEMICAL
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