Page 55 - e book prim 611
P. 55
Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025
Examples:
Material Made of what Properties
Steel Mixture of iron and other It is strong and lasts for a
Concrete elements long time.
Mixture of rock, sand and - It is liquid until it dries, it
water. become hard
- It is used as a base of
building and bridges
because it is very strong.
In some cases, new materials are created due to the chemical
change.
Plastic Petroleum (liquid & burns - Tough solid.
easily) - Resists burning
In other cases, new materials are created by mixing materials at high
temperatures.
Shrink-wrap We add heat to plastic to make it shrink.
Glass
Mixture of sand with Becomes hard when it cools
small soda ash (sodium
carbonate)
55
