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Chemistry Core Questions > Using Resources > Flashcards

Using Resources Flashcards

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1
Q

What do humans use earths resources for?

A

Warmth, shelter, food and transport

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2
Q

What are some examples of natural resources?

A

Cotton wool and timber

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3
Q

What does synthetic mean?

A

Developed by chemical synthesis made by humans

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4
Q

What are some examples of synthetic resources?

A

Plastic polyester acrylic

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5
Q

What is a finite resource

A

A resource that will eventually run out

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6
Q

What is sustainable development?

A

Development that meets the needs of the current generations, without compromising the ability of future generations to meet their needs

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7
Q

Define potable water

A

Water that is safe to drink

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8
Q

Portable water contains

A

Low levels of dissolved salts and microbes

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9
Q

Pure water contains

A

Only water molecules

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10
Q

Two. Freshwater sources

A

 lakes, Rivers, Reservoir, and groundwater

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11
Q

What two steps are required to make freshwater potable

A

Filtration and sterilization

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12
Q

Give two ways to sterilize water

A

UV light, ozone and chlorine

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13
Q

Name the process that removes salt from seawater water

A

Desalination

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14
Q

Give one way in which salt can be removed from seawater

A

Distillation or reverse osmosis

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15
Q

Give an diadvantage of desalination

A

It uses lots of energy, so it’s very expensive

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16
Q

How can you determine the mass of dissolved solid in a sample of water?

A

Evaporate the water and weigh the sample on a balance

17
Q

What needs to be removed from sewage and agricultural waste water before safe to be released into the environment

A

Organic
Matter and microbes

18
Q

What needs to be removed from industrial wastewater before it is safe to be released into the environment

A

Organic matter and harmful chemicals

19
Q

The first step in wastewater treatment is

A

Screening and grit removal

20
Q

Sewage sludge is digested

A

Anaerobically

21
Q

Sewage effluent is digested

A

Aerobically

22
Q

What does a lifecycle assessment assess?

A

The environmental impact of a product

23
Q

Name the four stages of a lifecycle assessment

A

Extracting and processing raw materials, manufacturing, and packaging. Use during lifetime disposal

24
Q

Between each stage of a lifecycle assessment, there is

A

Transport

25
Q

What are the three Rs

A

Reduce reuse recycle

Chemistry Core Questions (16 decks)

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