Science Unit 4 Lesson 6 Flashcards
What does smelting mean?
to extract metal from an ore by heating and melting it
Bronze is made by combining what 2 things?
By combining melting copper and tin
What is good about copper?
.pliable
.high conductivity
. anti-corrosion properties
What is copper mainly used for?
wires in homes, electronics, and coins
Copper is often extracted from what minerals?
Chalcopyrite and cornite
What properties does tin have?
.soft
.pliable
.resists corrosion
Why is tin commonly combined with other metals?
Because is resists corrosion
What is tin-based solder?
is used to fuse metals together
Where is tin extracted from?
It is extracted from the ore Cassiterite.
Why is aluminum essential to airplanes?
because of its durability, light weight, and low cost.
How much of an airplane’s structure is made of aluminum?
80% of an airplanes structure is made of aluminum.
Aluminum is combined with tin to make what?
This element is combinded with tin to make aerospace.
True or False.
Aluminum is the most abundant metal on Earth’s crust.
True
What percentage of earth’s crust is aluminum?
8%
Where is aluminum found in?
Its primarily found in the mineral bauxite.
Why do you think gold is found as a pure metal in nature while aluminum is found in ores?
Gold is not reactive, so it does not easily form chemical compounds with other elements, while aluminum is highly reactive and readily forms compounds.
What does high reactive aluminum mean?
This means that it bonds very easily with other elements to form compound
Basic facts of aluminum?
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.
Aluminum can be found in what minerals?
Aluminum can be found in a great number of
minerals, including bauxite, corundum,
alunite, topaz, and mica.
Steps to make aluminum/the bayer process
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.
What is alumina?
Alumina or aluminum oxide is a chemical compound of aluminum and oxygen
Why is strip mining generally used for bauxite?
Bauxite is found at or near Earth’s surface, so it is most easily accessed using strip mining.
What is a ductile metal?
A metal that is ductile can be stretched into thin
wires without breaking.
What is a malleable metal?
A metal that is malleable can be hammered or pressed into thin sheets
What is a ductile metal?
A metal that is ductile can be stretched into thin wires without breaking
Tin’s avalabilty compared to other minerals.
Tin is the 49th most abundant mineral in
the Earth’s crust.
How much tin does the earths crust contain?
The crust contains about 0.0002% tin
What does corrosion mean?
the destruction of a material by a chemical action
What is a malleable metal?
A metal that is malleable can be hammered or pressed into thin sheets.
Coppers avabilaty compared to other metals, is its scarce or abundant?
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
What is tin’s avalability compared to other metals; is it scarce or abundant?
Tin is the 49th most abundant mineral in
the Earth’s crust. The crust contains
about 0.0002% tin.
