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
3. Look at the copper sulfate solution and write a sentence to describe it in the table below. Save it for answering the questions that follow. Substance or mixture Water Copper sulfate crystals Copper sulfate solution Description (what it looks like) QUESTIONS: 1. Look at the solution. How can you tell that there is copper sulfate in the water? Another way to ask this question would be: What evidence do you have that there is copper sulfate in the water? 2. Can you see any copper sulfate crystals moving about in the water? 3. Why can't we see copper sulfate crystals moving about in the water? 140 Matter and Materials
4. What do you think happened to the copper sulfate particles? Where are they now? 5. Draw a picture of the particles in the copper sulfate solution in the space. You can use the following symbols to represent each substance: • shaded circles to represent water particles • white hexagons to represent copper sulfate particles 3.2 Soluble substances We have a word for substances that form solutions when they are mixed with water. These substances are called soluble substances. Substances that do NOT form solutions when they are mixed with water are called insoluble substances. In the next activity we are going to use some findings from a previous activity (Which mixtures are solutions?) to link this new idea to what we know about solutions. Chapter 3. Solutions as special mixtures VISIT How water mixes with a solute to make a solution. (video) goo.gl/zH7FY NEW WORDS • soluble substance • insoluble substance 141
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3. Look at the copper sulfate solution <strong>and</strong> write a sentence to<br />
describe it in the table below. Save it for answering the<br />
questions that follow.<br />
Substance or mixture<br />
Water<br />
Copper sulfate crystals<br />
Copper sulfate solution<br />
Description (what it looks<br />
like)<br />
QUESTIONS:<br />
1. Look at the solution. How can you tell that there is copper<br />
sulfate in the water? Another way to ask this question would<br />
be: What evidence do you have that there is copper sulfate in<br />
the water?<br />
2. Can you see any copper sulfate crystals moving about in the<br />
water?<br />
3. Why can't we see copper sulfate crystals moving about in the<br />
water?<br />
140 Matter <strong>and</strong> Materials
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