Scholars explore the procedure for bacteria sampling in a virtual lab by first walking through a detailed step-by-step procedure of preparing the samples of raw milk and pasteurized milk, growing the bacteria, and comparing results....

Aristotle explained the idea of spontaneous generation, a concept which lasted almost 2,000 years before scientists proved it wrong. Scholars learn about the history of our understanding of the origins of life. They read examples of...

Five pages take biologists on a generalized survey of the origin of life. Queries are made regarding theories of how life developed, ancient Earth conditions, and the ever-changing field of taxonomy. The experiments of different...

In this chemistry instructional activity, students review how chemistry has helped grow and preserve different foods. This instructional activity has 11 fill in the blank, 3 multiple choice, and 6 short answer questions.

In this communicable diseases worksheet, students explain what causes most types of diseases. Then they describe the difference between a disinfectant and an antiseptic. Students also determine ways that communicable diseases can be spread.

In this evolution worksheet, students will complete a table by writing in the era and biological event based on 4 different time periods of Earth's history. Students will answer 8 fill in the blank questions based on the different origin...

In this origin of life learning exercise, students will review the different theories on how life originated on the Earth including the experiments conducted by Louis Pastuer, Francesco Redi, and Miller and Urey. Students will complete...

In this microscope worksheet, learners use an on line site to answer questions about the history of the microscope, they view objects and identify what each is, they explore different magnifications of the microscope and they answer...

In this word search worksheet, students locate words related to biology. The word list includes protists, viruses, plants, spiral, and biotechnology.

In this biology activity, students complete short answer questions about botany, animals, plants, DNA, and more. Students complete 15 short answer questions.

In this bacteria quiz worksheet, students complete a set of 10 multiple choice questions covering a variety of concepts related to bacteria. A reference web site is included for additional resources.

In this dairy industry worksheet, students complete 5 multiple choice and 10 true or false questions based on reading about cows, milk and the dairy industry.

In this microscopes worksheet, learners access a website to complete questions about the early compound microscopes and the scientist involved in the development. This worksheet has 1 graphic organizer, 7 fill in the blank, and 10 short...

Although not quite as confusing as their, they're, and there, many people have difficulty with lead, lead (the toxic metallic), and led. Review these basic sentences with your third and fourth graders, and have them complete the...

Jonathan J. O'Sullivan describes how milk is made. [5:23]

Use this site to learn about Louis Pasteur's contributions to the world of science and to lives of ordinary people. View the "related links" as well as the bibliographical references from which images for the website were scanned.

It is sometimes assumed that scientists do not believe in God but these famous scientists actually did. Read details about their lives and beliefs, and some quotes attributed to them.

This black and white photo shows French chemist Louis Pasteur. He was famous for his many discoveries related to the immune system and the nature of diseases. Check out our Louis Pasteur facts page for more information on this famous...

This picture is based upon a photograph of a painting which has won great fame during recent years. The artist has represented Pasteur, the celebrated scientist, busily at work in his laboratory, recording the results of his microscopal...

A portrait of Louis Pasteur from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

A portrait of Louis Pasteur from the Dibner Library of the History of Science and Technology, made available through the Smithsonian Institution's Scientific Identity Collection.

Scholars explore the science topic of germs. The tutorial consists of definitions, examples, and pictures about germ theory.

Mostly told in first person, this site from the Fordham University gives an account of Joseph Lister's work on the principle of the practice of antiseptic surgery and a brief overview of his contributions to science and medicine. A very...

An interesting article that describes the relationship between chance and controlled scientific research. Several famous scientific discoveries are discussed.