Lesson 5.1

Question 1

The first production of mineral-based fire strikers
dated back 500 000 years during the time of the
Homo erectus.

Early humans used copper, silver, lead, and zinc
in forming alloys.

Question 2

The source of rock salt which is the
mineral halite.

Other examples include tungsten in
light bulbs, clay minerals in ceramic
pots, and fluorite in toothpaste.

stainless steel

Question 3

However, minerals contained
innately in food such as iron​, calcium, sodium​, and zinc are not considered as true
minerals by mineralogists.

Question 4

Minerals in electronics,
infrastructure, and manufacturing
include gold in electronic circuit
boards, quartz and silicon in
computers, and copper in
electrical wiring to name a few.

muscovite mica

Question 5

Minerals used in the medical include
barium is a helpful additive to
medicine in X-rays of the digestive
system and iron which is used to
treat anemia.

gypsum
mercury
kaolinite

Question 6

Some minerals are used as
gemstones, being valued for their
rarity and beauty.

Minerals such as diamond, rubies,
sapphires, emeralds, and opals are
the components of most jewelries.

Question 7

Minerals are essential for everyday life.

Minerals were used during the Stone Age, Bronze Age, and Iron Age.

Minerals can be seen at home, as components of electronics, in jewelries, and
have applications in health and medicine.

The use of minerals depends on the mineral’s physical and chemical properties.