Wayne RESA

Unit PlannerChemistry MSS Draft

Wayne RESA / 9 - 12 / Science / Chemistry MSS Draft / Week 36 - Week 37
7 Curriculum Developers

Overview

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Unit Abstract

Wayne RESA MSS/NGSS aligned high school Chemistry Curriculum 2017; including 8 Units to be taught in a year long chemistry course.

 

This unit addresses the NGSS that involve nuclear chemistry. Topics include type of nuclear radiation, 1/2 lives and nuclear energy.

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Storyline
Narrative
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Expectations/Standards
NGSS: Disciplinary Core Ideas
NGSS: 9-12
PS1: Matter and Its Interactions
PS1.A: Structure and Properties of Matter
Each atom has a charged substructure consisting of a nucleus, which is made of protons and neutrons, surrounded by electrons. (HS-PS1-1)
Stable forms of matter are those in which the electric and magnetic field energy is minimized. A stable molecule has less energy than the same set of atoms separated; one must provide at least this energy in order to take the molecule apart. (HS-PS1-4)
PS1.C: Nuclear Processes
Nuclear processes, including fusion, fission, and radioactive decays of unstable nuclei, involve release or absorption ofenergy. The total number of neutrons plus protons does notchange in any nuclear process. (HSPS1-8)
Spontaneous radioactive decays follow a characteristicexponential decay law. Nuclear lifetimes allow radiometric dating to be used to determine the ages of rocks and other materials. (secondary to HS-ESS1-5),(secondary to HS-ESS1-6)
PS3: Energy
PS3.D: Energy in Chemical Processes and Everyday Life
Nuclear Fusion processes in the center of the sun release the energy that ultimately reaches Earth as radiation. (secondary to HS-ESS1-1)
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Access the interactive version of the NGSS here
Learning Targets

L1: Does radiation affect me?

I CAN acknowledge that radiation is all around me, understand where it comes from, and that not all radiation is considered bad or harmful.

 

L2: What is a ½ life?

I CAN recognize that the ½ life of a substance varies from a few milliseconds to millions of years.

I CAN describe that the half life of a substance is the time in which ½ of the material radioactivity decays.

I CAN graph the amount of a substance vs time and know that the shape of the graph is very predictable for radioactive substances.

 

L3: What are the types of radiation?

I CAN explain that radioactivity is due to a change in the nucleus for alpha and beta decay and energy for a gamma decay.

I CAN write nuclear decay reactions involving alpha, beta and gamma that show the number of protons and neutrons do not change in a nuclear reaction.

 

L4: Can radiation be used for current and future energy needs?

I CAN describe the difference between fission and fusion including and how each can be used for energy.

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Enduring Understandings

Grade Band Endpoints

PS1.C Nuclear Reactions

By the end of grade 12 students should know...

  • Nuclear processes including fusion, fission, and radioactive decay of unstable nuclei

  • Total number of neutrons plus protons do not change in nuclear process

  • Spontaneous radioactive decay follows a characteristic exponential decay law

Essential Questions

L1: Does radiation affect me?

 

L2: What is a ½ life?

 

L3: What are the types of radiation?

 

L4: Can radiation be used for energy?

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Content (Key Concepts)

Pieces of the DCI taken from the FRAMEWORK. The entire DCI is to unpacked, just those pieces related to this unit.

 

PS1.A

“Each atom has a charged substructure consisting of a nucleus, which is made of protons, neutrons, surrounded by electrons.”

  • considered prior knowledge to this unit

 

PS1.C

“The strong nuclear interaction provides the primary force that holds nuclei together and determines nuclear binding energies.”

  • nuclear process include fission, fusion and radioactive decay

  • processes release more energy per atom than chemical process

“Nuclear fusion is a process in which a collision of two small nuclei eventually results in the formation of a single more massive nucleus with greater net binding energy and hence a release of energy.”

  • need high temperature and pressure

  • occurs in the cores of stars

“Nuclear fission is a process in which a massive nucleus splits into two or more smaller nuclei, which fly apart at high energy.”

  • massive nucleus splits into two or more smaller nuclei

  • produced nuclei are often not stable and undergo radioactive decay such as alpha, beta and gamma decay

  • Due to high energy in nuclear transition they can cause damage to biological tissues

“Nuclear fission and radioactive decays limit the set of stable isotopes of elements and the size of the largest stable nucleus.”

  • long lived isotopes can be found in rocks and minerals

  • knowledge of nuclear lifetimes allow for radiometric dating

 

 

Skills (Intellectual Processes)

Targeted Scientific Practices

 

Developing and Using Models

Modeling in 9–12 builds on K–8 and progresses to using, synthesizing, and developing models to predict and show relationships among variables between systems and their components in the natural and designed worlds.

 

  • Develop a model based on evidence to illustrate the relationships between systems or between components of a system. the changes in the composition of the nucleus of the atom and the energy released during the processes of fission, fusion, and radioactive decay.
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