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GCSE Chemistry Paper 2 > Using Resources > Flashcards

Using Resources Flashcards

1
Q

What is phytomining?

A

A method to absorb copper using plants.

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2
Q

How does phytomining work?

A

As the plants grow they absorb and store copper. The plants are then burned and the ash produced contains copper in relatively high quantities.

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3
Q

What is bioleaching?

A

A method to extract metals from low-grade ores using bacteria.

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4
Q

How does bioleaching work?

A

A solution containing bacteria is mixed with a low-grade ore and the bacteria convert the copper into a solution from which copper can be easily extracted.

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5
Q

What does potable water mean?

A

Water than is good quality and safe to drink.

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6
Q

What is sustainable development?

A

Development that meets the needs of the current generations and leaves resources for future generations.

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7
Q

Give examples of renewable resources.

A

Timber, wind/air, solar rays.

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8
Q

Give examples of non-renewable resources.

A

Fossil fuels, metal ores.

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9
Q

What causes the corrosion of metal?

A

When it reacts with oxygen and water.

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10
Q

What is meant by the term rusting?

A

The corrosion of iron objects or objects containing iron.

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11
Q

What is the word equation for rust?

A

iron+water+oxygen (goes to) hydrated iron oxide

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12
Q

What is a composite material?

A

A material that consists of two materials with different properties.

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13
Q

What is a life cycle assessment used to assess?

A

The environmental impacts a product has over its whole lifetime.

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14
Q

What is the Haber process?

A

A continuous process used to manufacture ammonia.

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15
Q

What is ammonia used for?

A

To produce nitrogen-based fertilisers.

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16
Q

What materials are used for manufacturing ammonia?

A

Purified nitrogen (from air), and hydrogen (from steam).

17
Q

What are the required conditions for manufacturing ammonia?

A

moderate temperatures of 450°C and high pressure of 200 atmosphere and an iron catalyst.

18
Q

Is the reaction between nitrogen and hydrogen exothermic or endothermic?

A

Exothermic.

19
Q

What does NPK stand for in NPK fertilisers?

A

nitrogen (N), phosphorus (P), and potassium (K).

20
Q

What are fertilisers used for?

A

To replace the essential elements in soil that are used up by plants as they grow.

21
Q

In the Haber process, how is ammonia removed from the mixture?

A

When cooling, ammonia liquifies and is removed from the mixture.

GCSE Chemistry Paper 2 (5 decks)

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