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YR7 Science > Chapter 5: Properties of materials > Flashcards

Chapter 5: Properties of materials Flashcards

Metals and non-metals. Comparing metals and non-metals. Metal mixtures. Using the properties of materials to separate mixtures. Acids and alkalis. Indicators and the pH scale.

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1
Q

List 5 properties of metals

A

Malleable, shiny, ductile, good conductor of heat and electricity, sonorous

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2
Q

List 5 properties of non-metals

A

Non-malleable, not sonorous, dull, insulators, brittle

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3
Q

What is an alloy?

A

An alloy is a mixture of metals

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4
Q

How are alloys made?

A

By mixing different metals together

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5
Q

Name 3 examples of alloys

A

Steel, bronze, brass

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6
Q

What is brass a mixture of?

A

Zinc + copper

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7
Q

What does alloy does copper and tin make

A

Bronze

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8
Q

What are alloys usually used for?

A

Jewellery, coins, and airplanes

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9
Q

Name 3 examples of acids

A

hydrochloric acid, sulfuric acid, nitric acid

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10
Q

Name 3 examples of alkaline substances

A

Soap, toothpaste, bleach

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11
Q

What are characteristics of acids?

A
  • sour
  • corrosive
  • harmful
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12
Q

What are the characteristics of alkalis?

A
  • bitter
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13
Q

What is a universal indicator?

A

A substance which shows how acidic or alkaline a substance is.

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14
Q

What colour does the litmus paper turn if the substance is an acid

A

red

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15
Q

What colour does the litmus paper turn if the substance is neutral

A

purple

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16
Q

What colour does the litmus paper turn if the substance is an alkali

A

blue

17
Q

Label the colours according to the PH scale

0-2 :
3-4 :
5-6 :
7 :
8-9 :
10-11 :
12-14 :

A

0-2 : Red
3-4 : Orange
5-6 : Yellow
7 : Green
8-9 : Light Blue
10-11 : Dark Blue
12-14 : Purple

18
Q

Which property of metals is most useful when:
Copper is used for electrical wiring

A

Good conductor of electricity

19
Q

Which property of metals is most useful when:
Gold is used for jewelry

A

Shiny

20
Q

Which property of metals is most useful when:
Iron is used to build bridges

A

Strong

21
Q

Which property of metals is most useful when:
Stainless steel is used for cooking pans

A

Good conductor of heat

YR7 Science (9 decks)

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