Science Unit 4 Lesson 6 Flashcards

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1
Q

What does smelting mean?

A

to extract metal from an ore by heating and melting it

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2
Q

Bronze is made by combining what 2 things?

A

By combining melting copper and tin

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2
Q

What is good about copper?

A

.pliable
.high conductivity
. anti-corrosion properties

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3
Q

What is copper mainly used for?

A

wires in homes, electronics, and coins

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4
Q

Copper is often extracted from what minerals?

A

Chalcopyrite and cornite

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5
Q

What properties does tin have?

A

.soft
.pliable
.resists corrosion

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6
Q

Why is tin commonly combined with other metals?

A

Because is resists corrosion

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7
Q

What is tin-based solder?

A

is used to fuse metals together

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8
Q

Where is tin extracted from?

A

It is extracted from the ore Cassiterite.

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9
Q

Why is aluminum essential to airplanes?

A

because of its durability, light weight, and low cost.

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10
Q

How much of an airplane’s structure is made of aluminum?

A

80% of an airplanes structure is made of aluminum.

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11
Q

Aluminum is combined with tin to make what?

A

This element is combinded with tin to make aerospace.

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12
Q

True or False.

Aluminum is the most abundant metal on Earth’s crust.

A

True

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13
Q

What percentage of earth’s crust is aluminum?

A

8%

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14
Q

Where is aluminum found in?

A

Its primarily found in the mineral bauxite.

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15
Q

Why do you think gold is found as a pure metal in nature while aluminum is found in ores?

A

Gold is not reactive, so it does not easily form chemical compounds with other elements, while aluminum is highly reactive and readily forms compounds.

16
Q

What does high reactive aluminum mean?

A

This means that it bonds very easily with other elements to form compound

17
Q

Basic facts of aluminum?

A

Aluminum is a ductile and malleable metal that
is a good conductor of heat and electricity. It is
the third most common element, and the most
common metal, on Earth, making up about 8%
of Earth’s crust.

18
Q

Aluminum can be found in what minerals?

A

Aluminum can be found in a great number of
minerals, including bauxite, corundum,
alunite, topaz, and mica.

19
Q

Steps to make aluminum/the bayer process

A

The aluminum in bauxite ore cannot be
produced directly. The first step in aluminum
production is to extract alumina from the ore.
Alumina, or aluminum oxide, is a chemical
compound of aluminum and oxygen.
The alumina in bauxite is produced through the
Bayer process. This process extracts alumina
from the remaining components of the bauxite
ore. It takes 2 pounds of bauxite ore to produce
1 pound of alumina.

20
Q

What is alumina?

A

Alumina or aluminum oxide is a chemical compound of aluminum and oxygen

21
Q

Why is strip mining generally used for bauxite?

A

Bauxite is found at or near Earth’s surface, so it is most easily accessed using strip mining.

22
Q

What is a ductile metal?

A

A metal that is ductile can be stretched into thin
wires without breaking.

23
Q

What is a malleable metal?

A

A metal that is malleable can be hammered or pressed into thin sheets

24
Q

What is a ductile metal?

A

A metal that is ductile can be stretched into thin wires without breaking

25
Q

Tin’s avalabilty compared to other minerals.

A

Tin is the 49th most abundant mineral in
the Earth’s crust.

26
Q

How much tin does the earths crust contain?

A

The crust contains about 0.0002% tin

27
Q

What does corrosion mean?

A

the destruction of a material by a chemical action

28
Q

What is a malleable metal?

A

A metal that is malleable can be hammered or pressed into thin sheets.

29
Q

Coppers avabilaty compared to other metals, is its scarce or abundant?

A

Ideally,
metals should be mined in locations where the
concentration is greater than 2%. However, in 2015, the
global average of copper concentration in mined ores
was 0.62%, far below the 2% ideal. Thus copper is scarce

30
Q

What is tin’s avalability compared to other metals; is it scarce or abundant?

A

Tin is the 49th most abundant mineral in
the Earth’s crust. The crust contains
about 0.0002% tin.

31
Q
A