Phases of the Moon
This site contains a series of visualizations of the sun, moon and Earth System and how they relate to the changing face of the moon. Animations are in the form of Java applets, forms for field observation of the moon, and a collection of exercises and PDF versions of background material. There are practice questions and quizzes that discuss the animations.
Inside the Oval Office
As staff secretary to President Dwight Eisenhower from 1954 to 1961, General Andrew Goodpaster was the person most privy to Eisenhower's thinking and key decisions during his White House years. Goodpaster began his long affiliation with Eisenhower as a staff officer under his leadership of the Supreme Headquarters Allied Powers Europe (SHAPE), and he went on to become the president's right-hand man on security matters. In this video segment, Goodpaster describes the inter-service rivalries that
Commissioned by Pioneer Laser disc for a project entitled 'AV Cocktail,' Peter Calles presents a world of constant motion, based on the children's game 'Menko.' Japanese figures appear as part of the frantic horizon.
Return of the Motherland
'Return of the Motherland' presents a complex compilation of Chilean mythology and politics. Using a variety of narratives, points of view, source materials, and film styles, this tale of a tragic love triangle is set against suffering and political strife.
Lunar Plant Growth Chamber
This site invites students to design chambers for growing plants on the moon. (Plants may be used to supplement meals of astronauts during space exploration.) Teacher guides include lessons on providing light and water for the plants, choosing plant species, exploring the moon, and designing, building, and evaluating plant growth chambers.
Seeing the Invisible
Students will be instructed to make an observation of a flower (tulip) given the one stipulation that they will only be allowed to detect the parts of the plant that are green. Through observation and discussion, students will be led to understand that only seeing parts of the flower leads to an incomplete and even inaccurate understanding of its structure. Students will construct their own knowledge of the Sun emitting light above and below the visible spectrum by using UV beads to detect ultr
Cosmic and Heliospheric Learning Center
This site explores the universe through interactive activities and learning resources such as the question and answer service, Ask a Physicist. Students can also learn astrophysics basics, or find out the history of cosmic ray studies beginning with the Mesopotamian and Egyptian astronomers mapping the heavens, and more.
This is an on-line resource on topics of Applied Calculus, including on-line tutorial sessions.
Stereographic Projection of Crystal Faces
This site features a lecture by Dr. Stephen Nelson from Tulane University that explores a systematic way to define crystallographic angles. The lecture discusses crystallographic angles and gives an introduction to the use of stereographic projections for depicting the angular relationships between crystal faces. Scientific illustrations clarify the text.
Introduction and Symmetry Operations
This site consists of an introductory lecture on crystal symmetry and symmetry operations. It provides the definition of a mineral and then covers topics including different types of rotational symmetry, mirror symmetry, the center of symmetry, different types of rotoinversion, and combinations of symmetry operations. Drawings help illustrate the concepts presented in the lecture.
This site provides an illustrated lecture about ocean chemistry from a geochemistry course offered by Dr. Scott Wood at the University of Idaho. Topics include geochemical processes that occur in estuaries, halmyrolysis, the concept of residence time for elements in the ocean, the mechanisms by which elements are added to or removed from seawater, carbonate behavior in seawater and a definition of the calcite compensation depth (CCD), the role of hydrothermal processes in controlling seawater ch
The Nature of Protest
This lesson will focus on the nature of protest by examining the different avenues that people take to express their opinions.
The Spins package is a self-contained file for the teaching of measurement and time evolution of spin-1/2 systems in quantum mechanics. The file contains ready-to-run OSP programs and a set of curricular materials. The material focuses on single and multiple measurements of different ensembles of identically prepared spin-1/2 particles. The OSP Collection provides curriculum resources that engage students in physics, computation, and computer modeling. Computational physics and computer modeling
Ajakirja Eesti Loodus otsingumootor
Ajakirja Eesti Loodus otsingumootor, lühendatud aadressil jõuab ka ajakirja numbriteni
One reason why caecilians are considered to be amphibians is because they go through metamorphosis to reach adulthood. Caecilians are unique amphibians because some of them lay eggs, but some of them give birth to live young.
Butterfly pupa anatomy
The pupa is the third stage of the butterfly's life cycle. The caterpillar creates a pupa, sometimes called a chrysalis, and emerges as the adult butterfly after metamorphosis. The butterfly's wings will be used for flying.
Boy on trampoline
The boy would feel less secure if the safety net around the trampoline wasn't there. Humans have an innate need to feel secure in their environments.
Blooming prickly pear cactus (Opuntia) from the Sonora desert
Cacti are often overlooked as flowering plants. In fact, cacti bloom with colorful flowers and reproduce like all other angiosperms.
Blood flow of moving Lumbriculus
Observe blood flow and muscle contractions in each body segment of Lumbriculus variegates (note how blood flows in relation to the worm turning in the capillary tube).
Blood circulation through zebrafish
Lateral and tail view of developing Danio showing blood flow to and from the tail section.