Natural Sciences and Technology Grade 6-A - Thunderbolt Kids

Water and sand
Sugar and rice
It is possible to mix materials in many dierent combinations. In a
mixture, the materials that have been mixed do not change. They
keep their individual properties. Sometimes it is possible to
separate a mixture into the individual materials again.
KEY CONCEPTS
• A mixture consists of two or more dierent materials mixed
together.
• Sometimes mixtures can be separated into the individual
materials again.
• Some of the ways in which mixtures can be separated are:
sieving, filtering, hand sorting, and settling followed by
decanting.
• When a material changes from a solid to a liquid, the
process is called melting.
• When amaterial forms a solution in another material, the
process is called dissolving.
• Melting and dissolving are two dierent processes.
130 Matter and Materials