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
INVESTIGATION: Does fine salt dissolve faster than rock salt? AIM: MATERIALS AND APPARATUS: • 2 clear containers (glass beakers are ideal, but small yoghurt tubs will also be suitable) • fine table salt • coarse rock salt • teaspoon • tap water • stopwatch METHOD: 1. Measure the same quantity (100 ml) of tap water into each container. 2. Place one teaspoon (5 ml) of fine table salt into the first container. 3. Stir the solution and measure the time it takes for the salt to dissolve completely. Record the time in the table below. 4. Repeat steps 2-3 with the coarse rock salt. 164 Matter and Materials
RESULTS: The eect of grain size on dissolving Situation Time to dissolve (in seconds) Fine salt in water Coarse salt in water QUESTIONS: 1. What did we compare in this investigation? 2. Name three things that were the same about the three situations. Chapter 4. Dissolving 165
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RESULTS:<br />
The eect of grain size on dissolving<br />
Situation Time to dissolve (in seconds)<br />
Fine salt in water<br />
Coarse salt in water<br />
QUESTIONS:<br />
1. What did we compare in this investigation?<br />
2. Name three things that were the same about the three<br />
situations.<br />
Chapter 4. Dissolving<br />
165
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