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Chemistry Unit 5 > Unit 5 > Flashcards

Unit 5 Flashcards

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1
Q

What is an anology?

A

The idea to explain another

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2
Q

What has positive charge in sub-atomic particles?

A

Protons

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3
Q

Sub-atomic particles that has no charge

A

Neutron

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4
Q

What makes up a nucleus of atom?

A

Protons and Neutrons

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5
Q

Which sub-atomic particle has the least mass?

A

Electron

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6
Q

How much carat is a pure gold?

A

24 Carats

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7
Q

How much percentage of gold in a 9 carat gold?

A

37.5 percent

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8
Q

What was the average temperature of the earth’s early atmosphere in celcius?

A

400*C

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9
Q

Explain what global warming means?

A

The rise of global temperatureof the Earth.

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10
Q

How does ice cores help scientists?

A

The gas from the atmosphere were trapped in the ice cores. The deeper the ice that the gas came from, the older the sample.

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11
Q

How do we differenciate pure diamonds and diamonds mixed with other elements?

A

Pure diamonds are colourless and translucent while diamond that cnotains other elements are coloured.

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12
Q

How pure is a 92.5 percent of silver

A

925/1000

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13
Q

How does fossil fuel affect global warming?

A

It creates greater greenhouse effect.

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14
Q

Give me 4 ways of alternate sources to generate electricity

A

Wind, Solar, Tide, Hydropower

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15
Q

What is the evidence that our temperature is rising?

A

The rising of sea levels.

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16
Q

What is the formula of photosyntesis?

A

carbon dioxide + water ~> Glucose + Oxygen

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17
Q

What is the difference between weather and climate?

A

Weather happens in a short period of time in a small area while climate happens in long periods of time with a bit area.

18
Q

What’s the difference between meteorology and climatology?

A

Meteorology is the study of weather
Climatology is the study of climate

19
Q

Where did carbon dioxide get formed in the early atmosphere?

A

the gases of volcanoes

20
Q

What is the nme of J.J Thompson’s atom model

A

The pudding model

21
Q

Who discovered neutrons?

A

James Chadwick

22
Q

Who discovered the nucleus and protons?

A

Ernest Rutherford

23
Q

What did Ernest Rutherford get through the gold foil experiment?

A

there is a nucleus.

24
Q

What is the difference between interglacial and glacial period?

A

Glacial period spreads further and faster than interglacial period

25
Q

Explain an ice age

A

when both glacial and interglacial happens.

26
Q

What is a fossil fuel?

A

Fossil fuels are locked up carbon from living things that died.

27
Q

How does a fossil from shelled animals occur?

A

shelled animals that die and fall to the bottom of the ocean which then are pressed by other dead shelled animals and slowly form a fossil with sedimantery rocks like limestone.

28
Q

What is the product of carbon + oxygen

A

carbon dioxide

29
Q

what does calcium carbonate form?

A

calcium oxide + carbon dioxide

30
Q

Explain what is an Atmosphere?

A

layer of gas above the Earth’s surface.

31
Q

what was the percentage of co2 in the old atmosphere

A

95%

32
Q

What is an atom?

A

the smallest part of particle

33
Q

What holds atoms together?

A

Electrostatic attraction

34
Q

What evidence is there that the Earth was much colder before than now?

A

Boulders that were made by ancient glaciers.

35
Q

Explain what is a peat bog

A

Plants that die in a place where there is no oxygen and slightly acidic decays very slowly. the deeper the peat, older it is.

36
Q

What is humidity?

A

The measure of water vapour in the atmosphere.

37
Q

Magnesium + oxygen

A

magnesium oxide

38
Q

silver nitrate + sodium chloride

A

sodium nitrate + silver chloride

39
Q

sulfuric acid + sodium hydroxide

A

sodium sulfate + water

40
Q

barium chloride + sodium sulfate

A

barium sulfate + sodium chloride

41
Q

lead nitrate + potassium iodide

A

potassium nitrate + lead iodide

42
Q

copper carbonate + hydrochloric acid

A

copper chloride + water + carbon dioxide

Chemistry Unit 5 (2 decks)

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