plastics 5 th grade stem
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Plastics 5 th Grade STEM. Building Block of the Modern World. Science Standard. STANDARD I: Students will understand that chemical and physical changes occur in matter. Objective 2: Evaluate evidence that indicates a physical change has occurred. - PowerPoint PPT PresentationTRANSCRIPT
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Plastics5th Grade
STEMBuilding Block of the Modern
World
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Science StandardSTANDARD I: Students will understand that chemical and physical changes occur in matter.Objective 2: Evaluate evidence that indicates a physical change has occurred. Identify the physical properties of matter (e.g.,
hard, soft, solid, liquid, gas). Compare changes in substances that indicate a
physical change has occurred. Describe the appearance of a substance before
and after a physical change.
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MathematicsStandard 5.NF.1Use equivalent fractions as a
strategy to add and subtract fractions.
Add and subtract fractions with unlike denominators (including mixed numbers) by replacing given fractions with equivalent fractions in such a way as to produce an equivalent sum or difference of fractions with like denominators. For example, 2/3 + 5/4 = 8/12 + 15/12 = 23/12. (In general, a/b + c/d = (ad + bc)/bd.)
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Technology and Engineering
TechnologyRuler and/or calculator, iPad
Engineering: Chemical EngineeringMaterials EngineeringManufacturing Engineering
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Brain Drain
What do you know about plastics?
Google GroupWhat is a physical property?
Which of these are physical properties?
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How have plastics changed our world?
For example, computing devices:
Abacus first Apple computer modern computer
What property of plastics makes them so adaptable for creating modern “boxes” for computers?
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What kinds of engineers create products made from plastics?
Chemical engineer
Materials engineer
Manufacturing engineer
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Are all plastics alike?
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How might these plastics be the same? Different?
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What tests can you design to discover the physical properties of plastics?
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Professional tests
StretchibilityPlastic Bag TestingCompressionPlastic Bottle Burst testFlame Test
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How are plastics formed in to products?
Injection molding
3 D Printing
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We do not have all that cool equipment but we can build something out of plastic. Our plastic “pellets” will be Legos. Here is the challenge:
Build a table out of legos. It must have a surface area of