問題一覧
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occupies space and has mass
matter
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composed of tiny molecules called atoms
matter
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4 classification of matter
solid, liquid, gas, plasma
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no definite volume
gas
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definite volume but indefinite shape
liquid
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definite volume and definite shape
solid
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super-heated matter
plasma
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example of plasma
lightning
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characteristics of substance which enables us to identify the substance
properties
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matter can be either physical and chemical properties
true
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properties that is perceived by senses and can be observed, measured and tested w/o changing the composition of the matter
physical properties
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example of phy properties
color
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2 properties of phy prop
intensive, extensive
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phy property that does not depend on the amount of matter present / being measured
intensive
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examples of intensive propert
color, hardness, boiling point
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phy property that depends on amount of matter presented/tested
extensive
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examples of extensive propert
mass, length, shape
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abilty of a material to resist scratching (pp)
hardness
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temperature where solid changes to liquid (pp)
melting point
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temperature where liquid changes to gas (pp)
boiling point
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property of a material taht pertains to the interaction of light
luster
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ability of a metal to be hammered/shaped w/o breaking/cracking
malleability
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mass of an object
density
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properties involved change in the substance's composition during chemical reaction
chemical properties
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example of chem propert
flammability
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changes may be physical or chemical
changes in matter
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change that do not alter the identity of a substance
physical change
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change that produces new compound with a different chemical composition and a different set of properties
chemical change
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process to which plants transform solar energy to chemical energy
photosynthesis
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matter can be classified to two composition
pure substance, mixture
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substance that contains only one type of particle and has uniform composition
pure substance
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substance that cannot be separated by physical means
pure substance
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pure substance can be separated into?
elements, compounds
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substances composed of only one atom
elements
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3 classification of elements(in order)
metal, non metal, metalloids
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constitute the greatest number of elements in the periodic table
metals
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example of metal
gold
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properties of metals
lustrous, malleable, ductile, good conductor
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what metal is not solid in room temperature
mercury
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elements that lack/dont have the characteristics of a metal
nonmetal
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example of nonmetal
oxygen
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properties of non metal
dull appearance, brittle, poor conductors of heat and electricity, good insulators, low density
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elements which have the properties of both metals and nonmetals
metalloids
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example of metalloid
boron
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substances composed of 2 or more atoms taht are chemically bonded together
compounds
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example of compound
water
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3 classification of compounds( plural)
acids, bases, salts
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compound that donates H+ ions
acid
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tastes sour
acid
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turns blue litmus paper to red
acid
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example of acid
vinegar
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accepts H+ ions
base
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taste bitter and feels slippery
base
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turns red litmus paper to blue
base
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example of base
ammonia
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compound that is formed when acid and base react
salt
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reaction which forms salt and water
neutralization
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example of salt
table salt
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made up of two or more substances which are mixed together but not chemically combined
mixture
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mixtures can be classified as
homogeneous, heterogeneous
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mixture that only has one phase and uniform composition
homogeneous
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example of homogeneous mixture
salt and water
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mixture w two or more phases
heterogeneous
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example of heterogeneous
halo halo
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2 types of heterogeneous
suspension, colloids
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heterogeneous mixtures that have particles bigger than colloids
suspension
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major difference between suspension and colloid
particle size
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what is colloidal dispersions also known as
colloid
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heterogeneous mixtures that have bigger particles than those of a solution but smaller than suspension
colloids