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Science gr9 > jun 11 unit test > Flashcards

jun 11 unit test Flashcards

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1
Q

solid -> gas

A

sublimation

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2
Q

gas-> solid

A

deposition

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3
Q

define matter

A

everything

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4
Q

define pure substances

A

one type of particle

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5
Q

define mixtures

A

two or more particles that make up something

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6
Q

define elements

A

cannot be broken down into smaller substances

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7
Q

define compounds

A

different elements combined in fixed proportions

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8
Q

define homogenious

A

it looks like one thing. eg.) apple juice,

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9
Q

define heterogeneous

A

you can see different things. eg.) a bowl of fruit

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10
Q

name some physical properties

A

states of matter ( gaseous, solid and liquid)
color.
smell.
freezing point.
boiling point.
melting point.
Magnetism

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11
Q

name some chemical properties

A

flammability, toxicity, acidity, reactivity

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12
Q

define chemical change

A

A chemical change is a change of materials into another, new materials with different properties and one or more than one new substances are formed

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13
Q

define physical change

A

Physical change is a type of change where the physical properties of matter change

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14
Q

examples of physical change?

A

Crumpling a sheet of aluminum foil.
Melting an ice cube.
Casting silver in a mold.
Breaking a bottle.

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15
Q

what happens when you change the number of neutrons

A

An isotope is formed

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16
Q

what happens when you change the number of electrons

A

an ion is formed

17
Q

what happens when you change the number of protons

A

the element changes

18
Q

is the period the row or the column

A

row

19
Q

is the group the row or the column

A

column

20
Q

what are the properties of metals

A

-high melting and boiling point
-solid at room temp (mostly)
-shiny, malleable
-good at conducting

21
Q

what are the properties of metalloids

A

middle of non-metals and metals

22
Q

what are the properties of non-metals

A
  • low melting and boiling point
  • mostly gases and solids at room temp
  • poor conductors
  • dull and brittle
23
Q

what do groups tell you

A

the number of valence electrons

24
Q

what do periods tell you

A

the number of orbitals

25
Q

what are the properties of ionic compounds

A

soft
brittle
high melting and boiling point
most are soluble
conductive

26
Q

what are the properties of molecular compounds

A

soft solids
can also be liquids and gases
low melting and boiling points
insoluble
do not conduct

27
Q

what bond is formed by a molecular comound

A

covalent

28
Q

what bond is formed by an ionic compound

A

ionic

29
Q

define a covalent bond

A

sharing electrons

30
Q

define an ionic bond

A

giving away electrons

Science gr9 (12 decks)

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