In this lesson designed to enhance literacy skills, an early astronaut's experiences teach students that Newton's third law of motion—for every action, there is an equal and opposite reaction—applies both on Earth and in outer space.

In this video segment adapted from NOVA, NASA learns hard lessons from the first American attempt to do work while "walking" in space. The video also explores Newton's third law of motion. [4:50]

In this video segment adapted from NOVA, NASA learns hard lessons from the first American attempt to do work while "walking" in space. The video also explores Newton's third law of motion.

In this video segment adapted from NOVA scienceNOW, MIT engineer Dava Newman is working to replace today's bulky, inflated space suits with a radical, sleek design that may one day allow astronauts to walk easily on Mars.

At this site from the Nobel e-Museum you can download and read Niels Bohr's Nobel Lecture, "The structure of the atom" (available in pdf format).

Read this detailed Nobel E-Museum biography which includes information on the scientific world of Joseph John Thomson, which gained world-wide recognition and earned Thomson the Nobel Prize in Physics.

The Nobel E Museum provides biographical information on Wolfgang Pauli, Austrian physicist and discoverer of the exclusion principle.

Read the 1915 Nobel Prize in Physics Presentation Speech originally given by Professor G. Granqvist, who was "Chairman of the Nobel Committee for Physics of the Royal Swedish Academy of Sciences." this speech touches on the accomplishments of William and Lawrence Bragg, the father and son who shared the 1915 Nobel Prize in Physics.

This Nobel Foundation site provides the "Presentation Speech by Professor S.A. Arrhenius, Chairman of the Nobel Committee for Physics of the Royal Swedish Academy of Sciences, on December 10, 1922."

This Nobel website on the life and scientific work of Robert A. Millikan includes a biography, images, and internet resources for further reading and research. Also included are the 1923 "Presentation Speech" which praised Millikan's work and Millikan's Nobel Lecture, " The electron and the light-quant from the experimental point of view," which is available in pdf format.

Read the Presentation Speech, originally given by Professor C.W. Oseen, in which Oseen praises the scientific investigations of Jean Baptiste Perrin, the physicist who "worked with [his] head and [his] hands in the service of atomistic ideas."

The Nobel Physics Chairman made this speech when presenting the Prize to Chadwick. It clearly explains the importance and depth of Chadwick's work. Site by Nobel e-Museum.

Students expand upon their understanding of simple machines with an introduction to compound machines. A compound machine a combination of two or more simple machines can affect work more than its individual components. Engineers who design compound machines aim to benefit society by lessening the amount of work that people exert for even common household tasks. This lesson encourages students to critically think about machine inventions and their role in our lives.

This site from Georgia State University provides a lengthy page with a thorough description of the fusion process. Discussion is complemented by excellent graphics and links to further information.

This video segment adapted from FRONTLINE looks at nuclear fission as an energy source that can be used to generate electricity.

This video segment produced for Teachers' Domain features a time-lapse video of clouds forming, changing, and moving across the sky.

This brief video segment produced for Teachers' Domain features time-lapse video of a sunrise and a sunset.

Students will use science skills of observing, describing and measuring in the context of Making Ice Cream. Students will understand the concept that physical properties can change.

This video segment adapted from Shedding Light on Science illustrates how light changes speed, and thus direction, in a process known as refraction.

This lab crushes an aluminum can to investigate states of matter and air pressure.