Punnett Squares: an Introduction

June 28, 2013
Biology

Punnett squares are diagrams that help student assess genotypic and phenotypic probabilities of the offspring generation.  The simplest Punnett squares look at just a single trait, or gene.  Genes, many times, have two varieties, called alleles.  Diploid individuals (like us!) carry two copies of the gene.  Sometimes an individual can carry two dominant alleles for a single gene.  Sometimes they can carry two recessive alleles and sometimes an individual can …More

Incline Plane Problems: how to rotate your point of view.

Incline Plane Problems: how to rotate your point of view.
June 21, 2013
Incline Plane

A common problem presented to the introductory physics student is the “incline problem.”  These problems usually involve  some sort of …More

Converting [H+] to pH, pOH, and [OH-]

Converting [H+] to pH, pOH, and [OH-]
June 14, 2013
Acid-Base Chemistry

What is pH?  pH is the measure of the hydronium ion in a solution.  The scale runs from 0-14, with …More

Relating Velocity vs. Time Graphs to Position vs. Time Graphs: Constant Velocity

Relating Velocity vs. Time Graphs to Position vs. Time Graphs: Constant Velocity
March 18, 2013
Physics

Although physics requires numerous calculations and formulas to solve problems, many introductory physics students face challenges understanding the concepts behind …More

Biomolecules: Protein Structure

Biomolecules:  Protein Structure
October 8, 2012
Biochemistry

An introduction to the four main groups of biomolecules (proteins, nucleic acids, lipids and carbohydrates) is presented here.  Today we …More

Kinematics: Free Falling Problem

Kinematics: Free Falling Problem
September 29, 2012
Physics

This post will focus on utilizing the basic kinematics equations with one-dimensional motion. We will be analyzing two balls being …More

Welcome Back!

Welcome Back!
September 19, 2012
Chemistry

Welcome back everyone for a new school year.  I hope everyone had a productive summer!  Over the summer, I took …More

Plant Life Cycle – Alternation of Generations

Plant Life Cycle – Alternation of Generations
May 28, 2012
Biology

Today, I will start posting about plants. Over the next two weeks, leading up the Praxis II Biology Exam on …More

Drawing Lewis Structures

Drawing Lewis Structures
April 10, 2012
Chemistry

What is a Lewis dot structure and why are you making me draw one?  Those are probably questions that have …More

ABO Blood Groups: Donating Blood

ABO Blood Groups:  Donating Blood
March 8, 2012
Biology

In our previous posts, we discussed the general characteristics of ABO and Rhesus blood groups.  In this post, we will discuss …More

Converting Molarity to PPM

Converting Molarity to PPM
March 7, 2012
Chemistry

Converting molarity to ppm (parts per million) is simple using the factor label method.  Let’s first look at what ppm …More