Introduction
You see substances and mixtures everyday, wherever you go. A substance could be any form of matter, whether it's a plank of wood, apple juice, or even the air, it's all a substance or mixture. But, today your learning about pure substances and mixtures!
This web quest will introduce you and teach about pure substances and mixtures. You will learn about the principles of the particle theory, solubility and the factors that affect it, properties and differences between pure substances, mixtures, and solutions, how to separate mixtures and solutions, concentration, saturation and the components of a solution like solutes and solvents.
Task
Task
The student will have understood the three states of matter and the key terms relating to pure substances and mixtures. They will have explained, in their own words, what it means, for some specific terms, an example, and how it relates to other terms. They would have conducted 3 experiments using the big ideas and created their own experiment. Student will have recorded a video explanation on the main ideas, and explained how to conduct their experiments.
Process
Process:
Task 1: Key Terms
Helpful tip: When you click a link, click the back arrow to come back to this site
To start off, you will be learning about the 4 states of matter, Solids, Liquids, Gases and Plasmas. For each state of matter, you will describe it in you own words, give an example, describe how they connect to each other. There are multiple sites that can give you this information, but we recommend the following ones. Put your answers in a online document or on lined paper.
http://www.nelson.com/perspectives/7/flash/document.pdf - pg 14-17
https://www.windows2universe.org/sun/Solar_interior/Sun_layers/Core/four_states.html- There are links within this site that will elaborate more on the topics.
Next, you are going to learn about some of the key terms that relate to pure substances and mixtures. Beside each term we will tell you some points we want you to research.
Helpful sources:
https://www.youtube.com/watch?v=TNsb9cquinE - Helps with understanding the Particle theory
https://quizlet.com/19112277/grade-7-science-unit-1-pure-substances-mixtures-flash-cards/ - Helps with understanding most of the terms
Here are the terms:
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Pure substance
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What is a pure substance?
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How does it relate to a mixture or solution?
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Particle theory
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What is the particle theory?
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What are the principles of the particle theory? Give a description for each of them
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Mixture
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What is a mixture?
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Include 3 examples of a mixture
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How is a mixture different from a solution?
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How do you separate a mixture? Give minimum 3 examples
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What are the properties of a mixture?
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Solution
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What is a solution?
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Include 3 different examples of a solution
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How do you separate a solution? Give minimum 3 examples
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What are the properties of a solution?
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What are the differences between a mechanical mixture and a solution?
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Solvent
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What is a solvent?
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How do solvents affect solutes?
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Solute
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What is a solute?
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How does a solute work?
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Solubility
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What is solubility?
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What factors affect the solubility of a substance?
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Concentration
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What is concentration?
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How do you measure it?
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What are the factors that can affect concentration?
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Task 2: Experiments
Experiments are a great way to learn specifically about this topic because this unit includes a lot of hands-on activities. For this part of the lesson, you will be conducting a few experiments that demonstrate the topics that you had previously learned. You will find a few experiments in the link below. We encourage you to look them over, and using the information that you have gathered, try to create your very own experiments.
http://www.nelson.com/perspectives/7/flash/document.pdf
Make sure that throughout your three experiments, you demonstrate most of the main topics that we have been talking about throughout this lesson. Your experiments should be somewhat interesting, have at least some complexity. Do not use or create any experiments that take a long time because you will need short experiments for the last part of this lesson.
In the beginning, when you have chosen your experiments, create a hypothesis for what you think is going to occur during your experiments. Then, while doing your 3 experiments, make notes on what is happening in your experiments. When you are done your experiments, record your results in a spreadsheet and write a conclusions which clearly states what you found, any surprises, what problems occurred and how you solved them. Include lots of info in the spreadsheets to clearly explain your results.
After looking through the websites and thinking of different experiments, decide on three good experiments that you will use for your final video.
Final Task: Video
You will need to record your video.
With the information that you have gathered from part 1, and the experiments you have from part 2, you will now create your video explanation. In this video, you will go in detail with your own words about all the important topics, and answer any questions that you may think anyone may have, or that you had during your research process. Treat this video like you are teaching a class.
Imagine you are the teacher giving a lesson. Use lots of the vocabulary that you learned!
After the initial explanations, you will then have to explain your three experiments, and conduct them. If your experiments take longer than the time you have for the video, set them up, and explain how they will work with images and diagrams that you have created.
Your video is expected to be within 10 - 25 minutes long.
Evaluation
|
Level 1 |
Level 2 |
Level 3 |
Level 4 |
|
|
(Part 1) Detail |
Answers were not detailed |
Went into detail |
Went into detail and explained thoroughly |
Went into lots of detail, and explained very thoroughly |
|
(Part 1) Writing, use of vocabulary and clarity |
Writing was not clear. Did not use any scientific vocabulary. |
Writing was somewhat clear and use a little scientific vocabulary. |
Writing was clear and had a good use of vocabulary. |
Writing was very clear and had an excessive use of vocabulary. |
|
(Part 2) Complexity and variety of experiments. |
Experiments chosen were not complex, very simple. |
Experiments chosen were somewhat complex. |
Experiments chosen were complex, completely showed learners knowledge. |
Experiments were excessively complex and included lots of detail. |
|
(Part 3) Demonstrating your learning in the video lesson |
Video lesson was not clear and did not demonstrate what you learned |
Video lesson was fair and demonstration of what you learned was mediocre |
Video lesson was clear and thoroughly demonstrated what you have learned |
Video lesson was very clear, and thoroughly demonstrated what you have learned. |
| (Part 3) Explanation | Explanation contained very little information, and is unclear | Explanation contained little information and is somewhat clear | Explanation contained information and is clear | Explanation contains lots of information and is very clear |
|
(Part 3) Experiments |
Experiments were very simple, and were unrelated to the topics | Experiments were simple and 1-2 of the topics were unrelated to the topics | Experiments were somewhat complex and were related to the topics | Experiments were complex and were related to the topics, demonstrating them very clear |
Conclusion
Congratulations! You are officially the Bill Nye of Pure substances and mixtures! Make sure that all the hard work you have done is handed in to your teacher and gets marked. Hope that you enjoyed this lesson and you will enjoy this topic from now on!
Credits
University of queensland,(2017), Particle theory
Retrieved from:
https://www.youtube.com/watch?v=TNsb9cquinE
Factors that effect solubility, No author, Science Classroom, (2016)
Retrieved from: https://www.youtube.com/watch?v=qL5-lcc_TfY
Factors affecting solubility, No author, Solubility of things, n.d
Retrieved from:
http://www.solubilityofthings.com/basics/factors_affecting_solubility.php
Factors affecting solubility, pdf
Retrieved from:
https://www.google.ca/url?
sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0ahUKEwiTn5Lkye7YAhXk5IMKHYzAA
eUQFggpMAE&url=https%3A%2F%2Fwww.sisd.net%2Fcms%2Flib%2FTX01001452%2FCentricity%2FD
omain%2F466%2FFactors%2520affecting%2520solubility%2520and%2520rate%2520of%2520solution%
2520notes.doc&usg=AOvVaw1hnMunz1Sc2zSOA_mZrIYx
Vernier Science, (N.D), No author
retrieved from:
http://www2.vernier.com/sample_labs/CHEM-I-05-pure_substances_open.pdf
ByJus, (2017), No author,
Retrieved from:
https://byjus.com/chemistry/mixtures/
Michelle Holmes, (2017), how to separate mixtures and solutions.
retrieved from:
https://www.youtube.com/watch?v=KORaKEYU9LU
Calculating concentration, Anne Marie Helmenstine, sep 21 2017, retrieved from https://www.thoughtco.com/calculating-concentration-and-dilution-608178
Ted Gibb, Pure substances and mixtures, (2000), Nelson Thomson learning, pg. 24-26
Anne Marie Helmenstine, ThoughtCo, (2017), Universal solvent definition.
Retrieved from: https://www.thoughtco.com/definition-of-universal-solvent-605762
Anne Marie Helmenstine, ThoughtCo, (2017), Solute definition and examples
Retrieved from: https://www.thoughtco.com/definition-of-solute-and-examples-605922
Chem4kids, Solutions and mixtures, (N.D.) Retrieved from http://www.chem4kids.com/files/matter_solution.html
FL-PDA, (n.d), 2011
Retrieved from:
http://www.fl-pda.org/independent/courses/elementary/science/section4/4d2.htm
Anne Marie Helmenstine, ThoughtCo, (2017), What is distillation?
Retrieved from:
https://www.thoughtco.com/what-is-distillation-601964
NCBI, Jue Xi Lu, Steve S. Bhimji, (2017), Chemistry dissolution and solubility
Retrieved from: https://www.ncbi.nlm.nih.gov/books/NBK431100/
http://www.nelson.com/perspectives/7/flash/document.pdf
https://www.windows2universe.org/sun/Solar_interior/Sun_layers/Core/four_states.html
https://quizlet.com/19112277/grade-7-science-unit-1-pure-substances-mixtures-flash-cards/