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science 6.1 6.2 7.1 7.2 7.3 > test > Flashcards

test Flashcards

1
Q

what is every substance in the universe made up of?

A

Atoms

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2
Q

What are elements?

A

Elements are substances that are made up of one type of atom

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3
Q

What are some properties of mettalic elements?

A
  • tend to be shiny (lustrous)
  • are solid at room temprature
  • are good conductors of heat and electricity
  • can be bent or hammered (malleable)
  • can be streched into wires (ductile)
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4
Q

What are some properties of non metallic elements?

A
  • tend to be dull
  • do not conduct heat or electricity (are insulators for electricity and heat.)
  • break or crumble when you bend them (brittle)
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5
Q

What is a monatomic?

A

A monatomic is an element that is made up of many individual atoms

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6
Q

what is a molecular

A

it is a cluster of atoms

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7
Q

What are lattices?

A

there are grid-like srtuctures of atoms

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8
Q

what is compounds?

A

a compound are substances made of lattices or identicsl molecules with two or more types of atoms

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9
Q

what is a mixture?

A

a mixture is any combination of two or more elements or compounds

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10
Q

what is an alloy?

A

a alloy is a mixture of metal with other metals or non-metals

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11
Q

what is a physical change? with an example

A

a change that does not resault in a new substance being produced

e.g
change in shape

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12
Q

Substances that make up a mixture can be easily seperated- true or false?

A

true

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13
Q

How many substances together is considered a mixture?

A

two or more

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14
Q

what is expansion?

A

When an object is
heated, it will expand
(get bigger).

The particles will also
move quicker.

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15
Q

what is contraction?

A

When an object is
cooled, it will contract
(get smaller).

The particles will also
move slower.

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16
Q

What are the three states of matter?

A

solid,liquid,gas

17
Q

What is freezing?

A

when a liqiud is cooled enough it will form a solid

18
Q

what is evaporation?

A

evaporation is where a liquid is warmed and becomes a gas

19
Q

what is condensation?

A

condensation is where a gas cools and becomes a liquid

20
Q

what is desolving?

A

desolving is where a solid is desolvid in a liquid that then forms mixture

21
Q

what is a chemical reaction?

A

it is the process of rearranging atoms in substances to form different substances

22
Q

what are aqueius solutions?

A

water base solutions

23
Q

what are propites?

A

set of characteristics in a element

24
Q

whats diffusion?

A

mixture of 2 gasses

25
Q

what is the photosynthisis word equation?

A

Carbon dioxide + water

oxygen +glucose

26
Q

what is corrosion?

A

when metals react to chemicals in its enviroment

27
Q

what is the word equation for corrosion?

A

Iron + water + oxygen gas 🡪 iron oxide

science 6.1 6.2 7.1 7.2 7.3 (1 decks)

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