Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
Natural Sciences and Technology Grade 6-A - Thunderbolt Kids
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VISIT<br />
Copper sulfate crystal<br />
time lapse.<br />
goo.gl/7lL35<br />
4. Pour some food colouring into your saturated solution to give<br />
the crystals a colour.<br />
5. Pour your solution into the clear glass jar. If you have<br />
undissolved sugar at the bottom of your container, avoid<br />
getting it in the jar.<br />
6. Place your sting inside the glass jar.<br />
7. Place your jar where it will not be disturbed <strong>and</strong> check on<br />
your string each day <strong>and</strong> observe the crystal growth.<br />
8. Allow the crystals to grow until they have reached a size that<br />
you desire, or until they have stopped growing. You can pull<br />
the string out <strong>and</strong> allow the crystals to dry. You can eat them<br />
or keep them!<br />
QUESTIONS:<br />
1. How long did it take for crystals to start forming on the<br />
string?<br />
2. What are the crystals made of?<br />
3. Why do you think we boiled the water when dissolving the<br />
sugar in the solution?<br />
An example of crystals in nature<br />
Have you ever visited a cave? Inside, you may have seen crystal<br />
formations called stalactites <strong>and</strong> stalagmites. Stalactites <strong>and</strong><br />
stalagmites form inside limestone caves. Stalactites hang down<br />
like icicles <strong>and</strong> stalagmites grow from the floor of the cave<br />
upwards. Stalactites <strong>and</strong> stalagmites always occur in pairs. Caves<br />
form when water slowly dissolves the limestone underground. The<br />
148 Matter <strong>and</strong> Materials
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