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Science (GCSE) > earth science and periodic table > Flashcards

earth science and periodic table Flashcards

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1
Q

What is produced during combustion if sulfur is present in the fuel?

A

Sulfur dioxide

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2
Q

What does sulfur dioxide form when it is dissolved in water?

A

Acid rain

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3
Q

State the percentage of Oxygen In today’s atmosphere

A

21 percent

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4
Q

8Why did the amount of carbon dioxide gas decrease over time?

A

Plants take in carbon dioxide for photosynthesis

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5
Q

State 3 pieces of evidence for Climate change

A

Temperature rising, rising sea levels, warmer oceans

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6
Q

What made up the Earth’s early atmosphere?

A

Large amounts of carbon dioxide
Little oxygen
Water vapour

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7
Q

What is the chemical test for oxygen?

A

Glowing splint relights

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8
Q
  1. Carbon dioxide, methane and water vapour absorb energy radiated from the Earth and reflect it back. This keeps the Earth warm. What is this called
A

Greenhouse affect

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9
Q
  1. What type of radiation does the Earth radiate
A

Infrared radiation

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10
Q

State two greenhouse gasses

A

Carbon dioxide, methane

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11
Q

How is group number linked to electrons in an atom?

A

Group number = number of electrons in the outer shell

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12
Q

How is period number linked to electrons in an atom?

A

Period number = number of electron shells

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13
Q

two properties of a group 1

A

soft, low mp

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14
Q

test for the gas produced when an alkali metal and water react

A

lit splint goes squeaky pop

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15
Q

group 7 known as

A

halogens

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16
Q

colour and state of chlorine at room temp

A

yellow/green gas

17
Q

test for chlorine

A

damp blue litmus paper goes white

18
Q

less reactive element for a compound

A

displacement

19
Q

colour of chlorine and potassium bromide

A

colourless to orange

20
Q

group 0 called

A

noble gas

21
Q

inert means

A

unreactive

22
Q

why are group 0 inert

A

full outer shell

23
Q

mp and bp change down group 0

A

increases

Science (GCSE) (18 decks)

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