The document is a lesson on material science, focusing on the properties and applications of various materials such as wood, paper, rubber, metals, plastic, ceramics, glass, and textiles. It emphasizes understanding the distinguishing qualities of these materials to create useful products from recyclables. The lesson includes objectives aimed at helping students identify and distinguish between useful and harmful materials based on their properties.

1. Welcome
to SCIENCE
5

2. The Material World
Today's Lesson

3. create useful
products from
recyclable
materials
Objectives:
At the end of the lesson the student will:
Understand
the
properties of
different
materials
identify and
distinguish between
useful and harmful
materials base on
their properties.

4. what is
matter?

5. Matter is anything that takes
up space and can be
weighed. In other words,
matter has volume and mass.
What is matter?

6. the properties
of material
should be
studied to
know how it
can be used
The Material World

7. properties
properties are the
distinguishing
qualities of an object,
such as its Color,
Shape, and Weight.

8. • Material Science is the study
of the properties and
application of different
materials.
• wood
• paper
• Rubber
• Metals
• Plastic
• Ceramic
• Glass
• Textile

9. Wood
wood is the natural product from trees. wood that we
cut from trees is called timber . because wood is hard,
flexible, long-lasting, it is commonly used to build
structures such as houses and furniture.

10. Paper is made from wood or plants pulps. paper is used to make
other materials such as carboards, notebooks, and books.
Its tensile strength and durability make it ideal for making bags and other
containers.
Paper

11. Rubber
Rubber is made from milky
juice of rubber trees called latex.
Rubber is widely used because it
is strong, elastic, durable and
waterproof. Rubber also has
other properties such as
adhesiveness and electrical
resistance.

12. Different properties of rubber
Elasticity
it is ability to return to its original shape after
being stretched.
Water resistance
it is ability to prevent water from passing
through. objects that have this property are
said to be waterproof.
Adhesiveness
it is ability to make surfaces join(or adhere)
together.

13. Metals
Metals come from rocks or minerals called ores. minerals ores are
extracted trough mining. To obtain the pure metals, the ores must be
crushed and then the metals isolated with the used of chemicals and
heat.

14. Alloys
alloys are combinations of two or more metals that result in an
improved property of metals.

15. Plastic
• Plastic is considered as useful because it is lightweight, flexible,
waterproof, and easy to use.
• Plastic products have replaced some of our products that are
traditionally made of wood and metals.
• Plastic product are synthetically made from oil or coal by converting the
natural products into polymers.

16. Ceramic
• Ceramics are made of clay shaped into forms and hardened in high-
temperature oven called kiln. Generally, ceramics are hard, brittle, and
corrosion-resistant. These properties make ceramics as ideal materials to
make some household objects.

17. Glass
• Glass is made by melting a mixture of sand and other minerals in a
furnace and then cooling it afterward. If glass is heated further, it can be
formed into various shapes. When made property glass is strong,
transparent, and waterproof. It can be used in cars as tinted glass.

18. Textile
• Textile is made by weaving or knitting the threads of different fibers,
which can be natural or synthetic.
• Natural fibers can be obtained from cotton, silk, wool, and pineapple .

19. Composite materials
• Composite materials are formed by the combination of two or more
materials in a structured where materials remain separated.

20. Check point
1.What are the similarities between
ceramics and glass?
2.In what ways can ceramics be useful
materials?
3.In what ways can glass be useful
materials?

21. End of
Lesson…