Todd Helmenstine

About Todd Helmenstine

Todd Helmenstine is the physicist/mathematician who creates most of the images and PDF files found on sciencenotes.org. The graphics are created in Adobe Illustrator, Fireworks and Photoshop. Todd also writes many of the example problems and general news articles found on the site. Mr. Helmenstine has bachelor of art degrees in physics and mathematics from Hastings College in Hastings, Nebraska.
Science Word Search
Science has many branches. This science word search contains the names of 30 different branches of science. Find the words from the list forward and backward in vertical, horizontal, and diagonal directions. The puzzle is optimized to fit on a standard 8.5″x11″ sheet of paper, but it fits nicely on […]

Science Disciplines Word Search

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Unit Conversion Chart
Unit conversion problems constitute the first week of nearly every science course. Measurement is a basic skill in science, but not all measurement methods are the same. People measure the same thing in different ways and use different units. To communicate between scientists, there has to be a method of […]

Unit Conversion Example Problems

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Trees Word Search
Trees have an important role in our day to day lives. They play a major role in the oxygen and carbon cycles, prevent soil erosion and provide building materials for our homes. Since trees are this important, maybe we should learn their names. This trees word search contains thirty common names […]

Trees Word Search

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Amino Acids by Side Chains
Amino acids are the building blocks of polypeptides and proteins, which are used as structural components and enzymes. If you’re taking biochemistry, organic chemistry, or genetics, you need to be familiar with the 20 amino acids and also know their side chains. It’s the nature of the side chains that […]

Amino Acid Side Chains Study Sheet

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