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This Power point presentation gives a comprehensive outline about Rocks and Minerals, Assignments of Earth science
An introduction to minerals and rocks. It explains the three main categories of rocks and the properties of minerals. It also introduces the Mohs Scale of Hardness and explains how minerals can be categorized based on their chemical compositions. activities that help students understand the properties of minerals and how to identify them. The assignment at the end of the document requires students to search for a mineral in their household and surroundings and identify its properties and group.
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Download This Power point presentation gives a comprehensive outline about Rocks and Minerals and more Assignments Earth science in PDF only on Docsity!
THE THREE MAIN
CATEGORIES
OF ROCKS
FIRST QUARTER
CONTENT STANDARD
The learners demonstrate
understanding of the three main
categories of rocks
PERFORMANCE STANDARD
The learners shall be able to make a
plan that the community may use to
conserve and protect its resources
for future generations.
LEARNING OBJECTIVES
- Demonstrate understanding about physical and chemical properties of minerals
- Identify some common rock-forming minerals
- Classify minerals based on chemical affinity
WHAT DID YOU LEARN FROM YESTERDAYS LESSON?
LETS WATCH THIS
Activity
MINERAL
- A. Mineral — a naturally occurring (not man- made or machine generated), inorganic (not a byproduct
- of living things) solid with an orderly crystalline structure and a definite chemical
- composition
- B. Minerals are the basic building blocks of rocks.
Activity
5 PROPERTIES OF
MINERAL
- COLOR
- LUSTER
- STREAK
- CLEAVAGE
- HARDNESS
Do you
consider water
a mineral?
How about snowflake, or tube ice? Are these minerals?
HALITE
Mineral Name Halite (table salt) Chemical composition NaCl Luster Luster Non-metallic – vitreous; transparent to transluscent Harndess Soft (2-2.5) Color White Streak White Crystal Form / Habit Cubic Cleavage Perfect cubic Specific Gravity Light (2.2)
- USING YOUR EXIXTING GROUP COME UP WITH A PRESENTATION ABOUT THE DIFFERENT PROPERTIES OF MINIRALS. each group will be given assigned topic which you will be presenting to the class.
- Your presentation can be in a form of short role play, dance number, song number or even yell.
- You will be given 10 min to practice
ACTIVUTY # 4 ITS SHOWTIME
a. Metallic – generally opaque and exhibit a resplendent shine similar to a polished metal b. Non-metallic – vitreous (glassy), adamantine (brilliant/diamond-like), resinous, silky, pearly, dull (earthy), greasy, among others.
1. Luster – it is the quality and intensity of
reflected light exhibited by the mineral
a. Introduce students to the use of a hardness scale designed by German geologist/mineralogist Friedrich Mohs in 1812 (Mohs Scale of Hardness).
- Hardness – it is a measure of the resistance of a mineral (not specifically surface) to abrasion.
c. Pros of the Mohs scale: i. The test is easy. ii. The test can be done anywhere, anytime, as long as there is sufficient light to see scratches.
- Hardness – it is a measure of the resistance of a mineral (not specifically surface) to abrasion.
c. Pros of the Mohs scale: iii. The test is convenient for field geologists with scratch kits who want to make a rough identification of minerals outside the lab.
- Hardness – it is a measure of the resistance of a mineral (not specifically surface) to abrasion.
d. Cons of the Mohs scale: i. The Scale is qualitative, not quantitative ii. The test cannot be used to accurately test the hardness of industrial materials.
- Hardness – it is a measure of the resistance of a mineral (not specifically surface) to abrasion.
d. Cons of the Mohs scale: i. The Scale is qualitative, not quantitative ii. The test cannot be used to accurately test the hardness of industrial materials.
- Hardness – it is a measure of the resistance of a mineral (not specifically surface) to abrasion.
- Color and streak a. A lot of minerals can exhibit same or similar colors. Individual minerals can also display a variety of colors resulting from impurities and from some geologic processes like weathering. b. Examples of coloring: quartz can be pink (rose quartz), purple (amethyst), orange (citrine), white (colorless quartz) etc.
- Color and streak c. Streak, on the other hand, is the mineral’s color in powdered form. It is inherent in almost every mineral, and is a more diagnostic property compared to color. Note that the color of a mineral can be different from its streak. d. Examples of streak: pyrite (FeS2) exhibits gold color but has a black or dark gray streak.
- Color and streak Left picture: blocky/cubic or equant (it has equal growth rate in three dimensions). Middle picture: bladed habit (it resembles a blade, with varied growth rates in 3 dimensions). Right picture: needle-like habit (rapid growth of crystals in one dimension while slow in other dimensions).
- Cleavage b. When minerals break evenly in more than one direction, cleavage is described by the number of cleavage directions, the angle(s) at which they meet, and the quality of cleavage (e.g. cleavage in 2 directions at 90°).