Problem
Mr. Pike will be having his classroom perform some lab experiments where they must determine whether or not a substance conducts electricity. In order to perform the experiment the students will need to develop a device that will indicate whether or not a solution conducts electricity. Unfortunately, none of his students have any knowledge about electronics so they have requested the help of the grade 9 class. The class is in luck as many of the resources and tools are located in the lab such as LED lights, 1000 ohm resistors, wire, solder, solder gun, pens, and 9 volt batteries.
Design brief
To create a product that shows if a substance conduct electricity, we will use a stripped out pen, a resistor, copper wire, LED's, solder, solder guns, and 9 volt batteries.
Terms
Ionic compounds - a chemical compound in which ions are held together in a lattice structure by ionic bonds.
Molecular substance - is an electrically neutral group of two or more atoms held together by chemical bonds.
Distilled water - water that has many of its impurities removed through distillation.
Electrolytes - a liquid or gel that contains ions and can be decomposed by electrolysis.
cathode - the negatively charged electrode by which electrons enter an electrical device.
Anode - the positively charged electrode by which the electrons leave a deice.
Molecular substance - is an electrically neutral group of two or more atoms held together by chemical bonds.
Distilled water - water that has many of its impurities removed through distillation.
Electrolytes - a liquid or gel that contains ions and can be decomposed by electrolysis.
cathode - the negatively charged electrode by which electrons enter an electrical device.
Anode - the positively charged electrode by which the electrons leave a deice.
Questions
Colour code for 1000 ohm resistor
Answer: brown, black, red
1. Explain the difference between a cation and an anion
Answer: They are both ions, but a cation are ions with a net positive charge.
2. What is tinning and why do we do it with a soldering gun.
Answer: Tinning is when you put a light layer of solder over another piece of metal. We do this to clean it, it also makes it more effective.
3. Do you have the solder or the connection with the soldering gun?
Answer: You heat the connection.
4. Why do we use a breadboard to develop our first prototype.
Answer: Because the solderless breadboard for electric does not require soldering, its reusable, so it makes it easier to create prototypes on.
5. What is a continuity test?
Answer: Its for checking electric circuit to see if current flows.
6. What is a conductivity tester?
Answer: It tests to see how conductive or not through different substances.
Answer: brown, black, red
1. Explain the difference between a cation and an anion
Answer: They are both ions, but a cation are ions with a net positive charge.
2. What is tinning and why do we do it with a soldering gun.
Answer: Tinning is when you put a light layer of solder over another piece of metal. We do this to clean it, it also makes it more effective.
3. Do you have the solder or the connection with the soldering gun?
Answer: You heat the connection.
4. Why do we use a breadboard to develop our first prototype.
Answer: Because the solderless breadboard for electric does not require soldering, its reusable, so it makes it easier to create prototypes on.
5. What is a continuity test?
Answer: Its for checking electric circuit to see if current flows.
6. What is a conductivity tester?
Answer: It tests to see how conductive or not through different substances.
Choose a solution
we chose drawing #3 as our solution.
Questions
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Design 1 rating
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Design 2 rating
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Design 3 rating
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We will be building design #3. we chose this design because it had the highest rating out of the three designs.