The document describes minerals and their properties. It provides a crossword puzzle to test knowledge of minerals. It defines minerals as naturally occurring inorganic substances with definite compositions and crystalline structures. Key minerals described include halite found in salt and graphite found in pencils. The document also discusses mineral properties such as hardness, streak, luster and tenacity. It introduces the Mohs hardness scale and notes that diamonds are the hardest mineral.

2. CROSSWORD PUZZLE
Directions: Complete the crossword puzzle by identifying what is
being described.
Down
2. It is a mineral found
in salt.
3. It has definite shape
and volume.
5. It is also known as
sodium chloride.
Across
1. It is solid inorganic
substance of natural
occurrence.
4. It is a mineral found
in pencil.

3.  is a naturally occurring
substance formed in the
earth.
Minerals
Example:
 Halite – is the mineral compound
NaCl.
 Graphite – is the mineral found in
pencil.

4. 1. Naturally occurring- term which
identifies mineral as part of earth’s
natural processes.
2. Inorganic- means a substance is
not a product of an organism.
Characteristics of Minerals

5. 3. Homogeneous solid- minerals should
have definite volume and rigid shape
4. Definite chemical composition—
represented by a chemical formula
5. Orderly crystalline structure- atoms
of minerals are arranged in an orderly
and repeating pattern

6. 19 – 20 characteristics of minerals
• Homogeneous solid manliswi
• Definite chemical composition baloloy
• Orderly crystalline structure Giray
• Inorganic Entia Lovely
• Naturally occurring rosalejos

7. a. Color - mineral’s color may
change depending on the
surface.
b. Streak - color of mineral in
powdered form.
c. Hardness - minerals resistance
to scratching
Properties of Minerals

8. • Color Bugtai
• Streak dag-uman J
• Hardness Pancho
• Luster Proto Jhon lloyd
• Cleavage Gabutero LA
• Diaphaneity Felarca
• Tenacity Pacot
• Sectility prato M
• Crystalline structure or habit

9. Mohs Scale of Hardness
(Diamond is the Hardest with a
scale of 10)
10 - Diamond
9 - Corundum
8 - Topaz
7 - Quartz
6 - Orthoclase
5 - Apatite
4 - Fluorite
3 - Calcite
2 - Gypsum
1 - Talc

10. d.Cleavage - mineral’s resistance to
being broken and fracture
e.Crystalline structure or habit
f. Diaphaneity/amount of transparency
- ability to allow light to pass through
it. This is affected by chemical
makeup of the mineral sample.
g.Luster - how light is reflected off a
surface

11. h. Tenacity- describes the minerals
reaction to stress.
• Brittleness - a mineral turns into
powder guilingan-absent
• Malleability - a mineral can be
flattened by pounding with a hammer.
Gabutero J
• Ductility- A mineral can be stretched
into wire. EneroG

12. • Flexible but inelastic-Minerals are
bent but they remain in the new
position. Perez
• Flexible and elastic- Minerals are
bent, and they bring back to their
original position. Alburo
i. Sectility- ability of minerals to be
sliced by a knife. prato

13. The Mohs scale (pronounced
MOZE) was introduced in 1822.
It originated when Friedrich
Mohs chose ten minerals and
assigned numbers to them
based on the relative ease or
difficulty in which stone can be
scratched by another.
Did you
know?

14. ⪢ Sectility
⪢ Flexible and elastic
⪢ Flexible and inelastic
⪢ Cleavage
⪢ Diaphaneity
⪢ Luster
⪢ Tenacity
⪢ Color
⪢ Streak
⪢ Hardness
⪢ Homogeneous solid
⪢ Definite chemical
composition
⪢ Orderly crystalline
structure
⪢ Inorganic
⪢ Naturally occurring
⪢ Brittleness
⪢ Malleability
⪢ Ductility

15. 1. a ranking of mineral from softest hardest
2. ability of mineral to be cut by knife
3. shows the true color of mineral
4. repeating pattern in minerals in solid
5. describes the mineral reaction to stress
6. a manner by which mineral reflects light.
7. a term which identifies minerals as part of Earth’s natural processes.
8. means a substance is not a product of an organism.
9. have definite shape and volume.
10. represented by chemical formula
11. It is a mineral that is bent but goes back to its original position.
12. It is a mineral found in salt.
13. It is also known as sodium chloride.
14. It is a mineral found in pencil.
15. What is the hardest mineral?
16. What is the softest mineral?
17. The person who studies minerals
18. What year does the Mohs Hardness Scale introduced?
19 – 20. 2 characteristics of minerals
21 – 25. 5 properties of minerals.
1. Mohs Hardness Scale/
Mohs Scale
2. Sectility
3. Streak
4. Orderly Crystalline
Structure
5. Tenacity
6. Luster
7. Naturally Occurring
8. Inorganic
9. Homogeneous Solid
10.Definite Chemical
composition
11.Flexible and elastic
12.Halite
13.Salt
14.Graphite
15.Diamond
16.Talc
17.Mineralogist
18.1822

16. 1.Mohs Hardness Scale/ Mohs Scale
2.Sectility
3.Streak
4.Orderly Crystalline Structure
5.Tenacity
6.Luster
7.Naturally Occurring
8.Inorganic
9.Homogeneous Solid
10.Definite Chemical composition

17. 11.Flexible and elastic
12.Halite
13.Salt
14.Graphite
15.Diamond
16.Talc
17.Mineralogist
18.1822