Multimedia Learning Objects: Science

Resonance is used to depict the distribution of electrons across a molecule which can also be referred to as delocalization. This distribution of electrons can be used to explain the stability and help predict the reactivity of a molecule. Resonance structures are a series of two or more bond line structures that show how electrons are distributed across a single molecule. In organic chemistry there are five common patterns of resonance that help explain the delocalization (spreading) of electrons in molecules. In this interactive activity, learners explore four resonance patterns and use curved arrows to visualize electron movement.

author:
Taylor Thane, Ph.D, Assistant Professor Chemistry & Biochemistry Dept.

design credits:
Erick Zelaya, Sr. Multimedia Developer
Donya Rahimi, Instructional Designer

last updated:
September 5, 2025

link:
https://elearning.cpp.edu/learning-objects/resonance

embed code:
<iframe style="width: 100%; height: 100%; min-height: 700px; border: 0;" title="Resonance Structures" src="https://elearning.cpp.edu/learning-objects/resonance"></iframe>

In this activity learners examine the energy changes that occur when chemical bonds are made or broken, calculate the change in energy for a given chemical reaction or change, and determine if a reaction is endothermic or exothermic.

author:
Dr. Jodye Selco

design credits:
Richard Feldman, Multimedia Developer

last updated:
Aug 14, 2025

link:
https://elearning.cpp.edu/learning-objects/bond-energies/

Arrow-pushing is a technique that uses curved arrows to describe the motion of electrons in a given reaction. Students will use curved arrows to demonstrate the motion of electrons in an acid-base reaction (also called a proton transfer).

This activity presents a series of acid-base reactions. The user is tasked with drawing the curved arrows that depict the motion of electrons for each reaction.

author:
Taylor Thane, Ph.D, Assistant Professor Chemistry & Biochemistry Dept.

design credits:
Donya Rahimi, Instructional Designer
Erick Zelaya, Sr. Multimedia Developer

last updated:
June 1, 2023

link:
https://elearning.cpp.edu/learning-objects/arrow-pushing

embed code:
<iframe style="width: 100%; height: 100%; min-height: 700px; border: 0;" title="Arrow Pushing" src="https://elearning.cpp.edu/learning-objects/arrow-pushing"></iframe>

The cardiac cycle is the sequence of alternating contractions and relaxations of the human heart from the beginning of one heartbeat to the beginning of the next.

This activity is in the form of a drag-and-drop puzzle. The puzzle can be completed in steps by considering one part of the heart at a time, or by considering one phase of the cardiac cycle at a time. It can also be done all at once (without guidance) as a more challenging activity. Completing all three activities in order will give better practice and help students learn the material effectively.

author:
Juanita Thompson, Ph.D, Associate Professor of Biological Sciences

design credits:
Donya Rahimi, Instructional Designer
Erick Zelaya, Sr. Multimedia Developer

last updated:
May 25, 2023

link:
https://elearning.cpp.edu/learning-objects/cardiac-cycle

embed code:
<iframe style="width: 100%; height: 100%; min-height: 700px; border: 0;" title="The Cardiac Cycle" src="https://elearning.cpp.edu/learning-objects/cardiac-cycle"></iframe>

By arranging transcriptional regulators and a generic repressor to control gene expression of two genes, students are able to demonstrate how different transcription factors and repressors are used to increase or decrease gene expression of two model genes.

author:
Dr. Andrew Steele, Associate Professor of Biological Sciences

design credits:
Erick Zelaya, Sr. Multimedia Developer

last updated:
October 6, 2022

link:
https://elearning.cpp.edu/learning-objects/transcription-and-repression

embed code:
<iframe style="width: 100%; height: 100%; min-height: 600px; border: 0;" title="Transcription and Repression" src="https://elearning.cpp.edu/learning-objects/transcription-and-repression"></iframe>

In order to explore the relation of shapes that build lattices, students place 12 shapes to try and create a lattice that is as compact as possible. Different shapes are used but not all shapes will work in creating lattices.

author:
Dr. S. Chantal E. Stieber, Associate Professor of Chemistry and Biochemistry Department

design credits:
April Dawn, Lead Sr. Instructional Designer
Erick Zelaya, Sr. Multimedia Developer

last updated:
March 2, 2022

link:
https://elearning.cpp.edu/learning-objects/lattices-crystallography

embed code:
<iframe style="width: 100%; height: 100%; min-height: 600px; border: 0;" title="Building Lattices  (Crystallography)" src="https://elearning.cpp.edu/learning-objects/lattices-crystallography"></iframe>

These animations help identify the 'parts list' and mechanisms that are involved in getting a signal from outside the cell all the way to the nucleus to change gene expression through three fundamentally different types of signal transduction pathways: nuclear receptor signaling, g-protein coupled receptor signaling, and receptor tyrosine kinase pathways.

author:
Dr. Andrew Steele, Associate Professor of Biological Sciences

design credits:
Erick Zelaya, Sr. Multimedia Developer

last updated:
December 20, 2019

link:
https://elearning.cpp.edu/learning-objects/cellular-signaling

An introduction to identifying Resting Swim Strokes versus Competitive Swim Strokes, providing foundational knowledge to increase your confidence and comfort level before you enter the water.

author:
RoseAnn A'Jontue

design credits:
Richard Feldman, Multimedia Developer
Bo Choi, Instructional Designer (former)

last updated:
September 12, 2018

link:
https://elearning.cpp.edu/learning-objects/swim-strokes

This simulation helps students to discover the ground state electron configurations of atoms, and how they can be predicted from the periodic table.

author:
Dr. Jodye Selco

design credits:
Richard Feldman, Multimedia Developer
April Dawn, Sr. Lead Instructional Designer

last updated:
May 31, 2018

link:
https://elearning.cpp.edu/learning-objects/atomic-electron-configurations

This simulation allows students to test their knowledge of visible light wavelengths, and how the perceived color of an object is not the color of light absorbed.

author:
Dr. Jodye Selco

design credits:
Richard Feldman, Multimedia Developer
Bo Choi, Instructional Designer (former)

last updated:
May 22, 2018

link:
https://elearning.cpp.edu/learning-objects/color-spectroscopy

This simulation demonstrates a liquid-liquid extraction procedure and explores the theory of using multiple extractions to isolate organic compounds from an aqueous reaction mixture.

author:
Dr. Laurie Starkey, Professor of Organic Chemistry

design credits:
Erick Zelaya, Sr. Multimedia Developer
Bo Choi, Instructional Designer (former)
Thomas Gaston, Technology Consultant

last updated:
February 2, 2018

link:
https://elearning.cpp.edu/learning-objects/organic-chemistry/liquid-extraction

embed code:
<iframe style="width: 100%; height: 100%; min-height: 600px; border: 0;" title="Organic Chemistry: Liquid Extraction" src="https://elearning.cpp.edu/learning-objects/organic-chemistry/liquid-extraction"></iframe>

This tool allows you to explore how TLC works, and to see how varying the solvent polarity affects the TLC results.

author:
Dr. Laurie Starkey, Professor of Organic Chemistry

design credits:
Erick Zelaya, Sr. Multimedia Developer
Bo Choi, Instructional Designer (former)
Thomas Gaston, Technology Consultant

last update:
March 2, 2022

link:
https://elearning.cpp.edu/learning-objects/organic-chemistry/tlc

embed code:
<iframe style="width: 100%; height: 100%; min-height: 600px; border: 0;" title="Organic Chemistry: Thin Layer Chromatography" src="https://elearning.cpp.edu/learning-objects/organic-chemistry/tlc"></iframe>

Practice building Lewis Dot Structures from atoms and ionic compounds from the component ions.

author:
Jodye Selco

design credits:
Richard Feldman, Multimedia Developer
Eric Davis, Instructional Designer

last updated:
March 2, 2022

link:
https://elearning.cpp.edu/learning-objects/making-molecules

This tool assist in learning the "parts" that make up a gene in order to facilitate understanding how gene expression is regulated.

author:
Dr. Andrew Steele

design credits:
Erick Zelaya, Sr. Multimedia Developer
Victoria Bhavsar, Director of CAFE (served as Instructional Designer for this project)

last updated:
September 15, 2015

link:
https://elearning.cpp.edu/learning-objects/gene-structure

This simulation (containing an interactive data table, graph, and animation) models the time dependence of Chemical Kinetics, Chemical Equilibrium, and Le Châtelier's Principle.

author:
Dr. Jodye Selco

design credits:
Erick Zelaya, Sr. Multimedia Developer
Bo Choi, Instructional Designer (former)

last updated:
December 23, 2014

link:
https://elearning.cpp.edu/learning-objects/dynamic-equilibrium

Proteins are made up of different combinations of amino acids. This simulation helps students understand the different enzymes responsible for making modifications, reversing modifications, and on which amino acids each modification can occur.

author:
Dr. Andrew Steele

design credits:
Erick Zelaya, Sr. Multimedia Developer
Victoria Bhavsar, Director of CAFE (served as Instructional Designer for this project)

last updated:
December 3, 2014

link:
https://elearning.cpp.edu/learning-objects/post-translational-modifications

In this three part simulation, students organize atoms representing the elements onto the periodic table based on the number of valence electrons.

author:
Dr. Jodye Selco

design credits:
Erick Zelaya, Sr. Multimedia Developer
Bo Choi, Instructional Designer (former)

last updated:
May 12, 2014

link:
https://elearning.cpp.edu/learning-objects/periodic-table

A  visual explanation of linkage disequilibrium and its evolutionary implications.

author:
Dr. Angel Valdes

design credits:
Erick Zelaya, Sr. Multimedia Developer
Terrance Hogan, Media Production Specialist
Blake Latin, Instructional Technology Assistant (former) (voiceover)

last updated:
August 17, 2012

link:
https://elearning.cpp.edu/learning-objects/linkage-disequilibrium