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The Crabby Doc

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Hello, my name is Lynda Harmon and I am in my 8th year of teaching secondary science. I have taught a range of STEM courses, including Biology, Chemistry, Physics, Technology, Environmental Science, and AP Chemistry. Prior to becoming a teacher, I was a research scientist studying the growth and progression of various cancers. I hold a B.A. in Biology, an M.S. in Education, and a Ph.D. in Physiology and Biophysics. My goal is for every student that I have the joy to teach to discover the beauty and complexity of science. I focus not only on learning and memorization of the content, but also teaching students to think and reason as a scientist would.

  • Atomic Line Spectra Lab Simulation Atomic Line Spectra Lab Simulation

    Atomic Line Spectra Lab Simulation

    The Atomic Line Spectra Lab Simulation aligns to the PhET Neon Lights and Other Discharge Lamps Simulation on the University of Colorado PhET Website.   It serves to reinforce the basics of electron excitation and photon emission by modeling the...

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  • Atomic Mass Worksheet Atomic Mass Worksheet

    Atomic Mass Worksheet

    10 short answer questions to test students understanding of atomic mass, weighted average, isotopes, and percent abundance. This worksheet asks students to apply the concepts. It does not ask students to calculate atomic mass. Visit The Crabby...

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  • Atomic Model Task Cards Atomic Model Task Cards

    Atomic Model Task Cards

    Enclosed are 20 atomic model task cards that review the major atomic models from the 19th and 20th centuries with a particular focus on the application of the quantum mechanical model. Models covered include: Dalton's atomic model Plum pudding...

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  • Atomic Number Worksheet Atomic Number Worksheet

    Atomic Number Worksheet

    Worksheet that requires scholars to use the periodic table to identify the atomic number of various elements, the number of protons, or electrons, or the identify of the element. Includes an answer key. Visit The Crabby Doc for more resources. 

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  • Balanced and Unbalanced Forces Balanced and Unbalanced Forces

    Balanced and Unbalanced Forces

    This worksheet serves as a quick check for understanding of balanced and unbalanced forces. It includes seven practice problems and answer key for rapid grading.   There are two versions of the worksheet differentiated...

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  • Balancing Chemical Equations Balancing Chemical Equations

    Balancing Chemical Equations

    Attached you will find a tried and true method to teach balancing chemical equations to learners of all abilities.  Balancing chemical equations is a skill that can be challenging for many students.  Because it is often presented in class as...

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  • Cellular Respiration Lab Sample Background Information Page

    Cellular Respiration Lab

    This laboratory investigation explores cellular respiration in a novel manner.  Students will use yeast as a model organism and test various "energy drink" recipes for their ability to produce energy.  The lab uses basic science supplies, does...

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  • Combining Vectors in 1 Dimension Combining Vectors in 1 Dimension

    Combining Vectors in 1 Dimension

    This worksheet includes 8 problems combining vectors in 1 dimension. Problems include visual diagrams with arrows and word problems. A great introductory check for understanding as students learn to work with vectors and direction in...

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  • Create Your Own Valentine: A Genetics Activity Create Your Own Valentine: A Genetics Activity

    Create Your Own Valentine: A Genetics Activity

    In this fun review activity, students create their own Valentine create using traits "inherited" from their parents. A list of 5 traits is inherited based on probability and the roll of a dice. The students then figure out which of the phenotypes their...

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  • Food Webs Worksheet Food Webs Worksheet

    Food Webs Worksheet

    This worksheet analyzes the various parts of a food web, including: Identifying herbivore, carnivore, omnivore, and apex predator Analyzing the effect of an extinct population on other populations in the web Recognizing energy flow through the...

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  • Ionic Bonding Task Cards Ionic Bonding Task Cards

    Ionic Bonding Task Cards

    20 engaging task cards covering a variety of topics related to ionic bonds. Students will explore ion formation, cations versus anions, identifying valence electrons, creating Lewis dot structures/electron dot structures, recognizing ion charge, and...

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