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Natural Sciences and Technology Grade 6-A - Thunderbolt Kids

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7. What do we call the process when steam (water vapour)<br />

changes to water?<br />

8. Do the particles in the ice change when the ice melts?<br />

9. If ice <strong>and</strong> liquid water have the same particles, why do ice <strong>and</strong><br />

liquid water have dierent properties? (Ice is solid <strong>and</strong> water<br />

is liquid.)<br />

10. How can the water particles in ice be made to move freely?<br />

(Think of the 'solid' learners. What did we give them to make<br />

them move?)<br />

KEY CONCEPTS<br />

• Matter can exist as 3 states, namely solids, liquids <strong>and</strong><br />

gases.<br />

• The particles in solids are closely packed <strong>and</strong> have fixed<br />

positions.<br />

• The particles in liquids are also closely packed but they can<br />

move around each other.<br />

• The particles in gases have large empty spaces between<br />

them.<br />

Chapter 1. Solids, liquids <strong>and</strong> gases<br />

VISIT<br />

A fun website with<br />

activities about<br />

materials.<br />

goo.gl/jlqrr<br />

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