Compounds, Elements, Atoms. Flashcards

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1
Q

What is a compound

A

a compound is made up of a bond of different atoms

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1
Q

What is an element

A

An element is a substance that cannot be broken down into any other substance. Every element is made up of its own type of atom

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2
Q

What is an atom

A

Simplest particle of an element

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3
Q

how can electric cars reduce pollution

A

they dont produce carbon dioxide or pther harmful emmissions

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4
Q

What is global warming

A

a gradual increase in the overall temperature of the earth’s atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide

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5
Q

Why is global warming happening

A

because when heat and energyu is produced from the sun, some heat is retained to keep the earth warm and some heat and enegry is reflected back to space because of the layer of greenhouse gases reflecting it back to earth

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6
Q

what can we do to stop global warming

A

electric cars, reuse, eat organic foods, recyle, avoid using plastic

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7
Q

what is chernobyl

A

– nuclear accident from industrial processes contaminated a huge area of land.

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8
Q

what do fossil feuls release when they burn

A

they may release small amounts of acidic gases called SULPHUR DIOXIDE and OXIDES OF NITROGEN

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9
Q

what are Sulphur dioxide and oxides of nitrogen causes of

A

acid rain

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10
Q

whats complete combustion

A

Fuel + Oxygen = Carbon Dioxide + Water

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11
Q

whats incomplete combustion

A

Fuel + Oxygen = Carbon Monoxide + Water

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12
Q

What is radiation

A

a wave which carries heat

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13
Q

what is convection

A

when hot gases or liquids expand or rise

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14
Q

what is conduction

A

when particles heat up as the vibrate more and pass on these vibrations

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15
Q

what does magnesium and oxygen uqual

A

magnesium oxide

16
Q

what does iron and oxygen equal

A

iron oxide

17
Q

what does copper and oxygen equal

A

copper oxide

18
Q

where does thermal energy move from

A

hot areas to cold areas

19
Q

sulphur dioxide and oxides of nitrogen are causes of what

A

acid rain

20
Q

when carbon burns what can it form

A

carbon dioxide

21
Q

what will carbon dioxide turn lime water

A

cloudy

22
Q

what can water be tested by

A

blue cobalt chloride solution

23
Q

what do most feuls contain

A

hydrogen and carbon

24
Q
A