מה זה לוויין?
מידע על לוויינים: למה הם משמשים? היכן הם נמצאים? כיצד משגרים אותם לחלל?
Ferns attached to a forest rock
Ferns have small, branched leaves, not to reduce gas exchange and water loss, but to increase the surface area for spore producing structures. This demonstrates that plants develop certain characteristics for very different reasons.
Telling the Story of Gaza
Laila El-Haddad is a talented blogger, journalist, social media activist, and parent-of-two from Gaza. She is author of the recently published book Gaza Mom: Palestine Politics, Parenting, and Everything in Between, based on the award-winning blog she has written since 2004, and contributing author to The Goldstone Report: The landmark Investigation of the Gaza Conflict. She received her B.A. from Duke University and her MPP from Harvard's Kennedy School of Government. From 2003-2006, El-Had
Texas Tech Cheerleaders Win 2nd Place at Nationals
Texas Tech's 2011 Cheerleading Squad won 2nd place at the NCA/NDA National Collegiate Cheer & Dance Competition. Get more information about Texas Tech Spirit Squads at: http://www.depts.ttu.edu/centerforcampuslife/spiritsquads
Rocket Car on an Inclined Plane Model
The EJS Rocket Car on an Inclined Plane model displays a car on an inclined plane. When the car reaches the bottom of the incline, it can be set to bounce (elastic collision) with the stop attached to the bottom of the incline. The car consists of the car body, two rotating front wheels, and two rotating rear wheels. The incline angle (in radians) can be changed via a textbox and the rocketâ€™s thrust can be changed via a slider. In addition the car can be dragged to its initial position. A
Introduction to Philosophy II
This course is designed as a "topics-based" introduction to philosophy. What this means is that instead of working through the history of philosophy focusing on great historical figures and their views on different topics, we will focus on great philosophical topics and look at what historical and contemporary writers have said about them. Topics to be addressed will include the existence of God, the relation between the mind and the body, human freedom, and the foundations of morality.
The Language of Algebra
This site provides a brief review of many aspects of algebraic language and use, from symbol sets and fractions to exponents and factoring. Intended as a reference for students already familiar with algebra, it is the first section of the online text Introductory Statistics: Concepts, Models, and Applications. This resource is part of the Teaching Quantitative Skills in the Geosciences collection. http://serc.carleton.edu/quantskills/
Pythagoras Theorem Proof
An interactive applet and associated web page that demonstrates a graphical proof of Pythagoras' Theorem. The applet shows a right triangle that is replicated and then moved around to demonstrate the relationship between the sides. It can can be stepped through slowly to allow classroom discussion, or let to run as a movie. Useful for students who like to see things graphically as opposed to symbolically. Applet can be enlarged to full screen size for use with a classroom projector. This resourc
Methods in Biostatistics I
Presents fundamental concepts in applied probability, exploratory data analysis, and statistical inference, focusing on probability and analysis of one and two samples. Topics include discrete and continuous probability models; expectation and variance; central limit theorem; inference, including hypothesis testing and confidence for means, proportions, and counts; maximum likelihood estimation; sample size determinations; elementary non-parametric methods; graphical displays; and data transform
CSI Surveillance Footage
This is the surveillance footage for our CSI Project
Global Wonders: Hello Song With Sing a Long
This is a cute animated video about different ways to say hello. The words to the song are displayed on screen and each word is highlighted as it is sung. Real photographs of children and people from different parts of the world are shown with their greeting word shown in their language. Content is appropriate for elementary students. (1:40)
This illustrated guide is designed to help students recognize and learn the different types of leaf shapes. The single Web page, which can be easily printed for use at field sites, shows: heart-shaped oval lobed divided narrow leaf shapes
8.04.2011 – Langsam gesprochene Nachrichten
Trainieren Sie Ihr Hörverstehen mit authentischen Materialien. Nutzen Sie die Nachrichten der Deutschen Welle von Freitag – als Text und als verständlich gesprochene Audio-Datei.Knapp vier Wochen nach der Erdbeben- und Tsunami-Katastrophe in Japan ist der Nordosten des Landes von einem neuen schweren Erdstoß der Stärke 7,4 erschüttert worden. Die Behörden erließen vorübergehend eine Tsunami-Warnung. Nach jüngsten Angaben kamen mindestens vier Menschen ums Leben, 140 wurden verletzt. T
Tommaso Treu and Mike Shara Discuss Super Massive Black Holes
Mike Shara, curator in the Department of Astrophysics at the American Museum of Natural History, sat down with Tommaso Treu, physics professor at the University of California, Santa Barbara, to discuss the importance of understanding super massive black holes and dark matter at the 217th American Astronomical Society meeting in Seattle, Washington. Treu also explained how he came to work in this specialized field. For more information, visit http://www.amnh.org
Small Regulatory RNAs May Sharpen Spatial Expression Patterns
The precise establishment of gene expression patterns is a crucial step in development. Formation of a sharp boundary between high and low spatial expression domains requires a genetic mechanism that exhibits sensitivity, yet is robust to fluctuations, a demand that may not be easily achieved by morphogens alone. Recently, it has been demonstrated that small RNAs (and, in particular, microRNAs) play many roles in embryonic development. Whereas some RNAs are essential for embryogenesis, others ar
Solving Energy Problems
The culminating energy project is introduced and the technical problem solving process is applied to get the students started on the project. By the end of the class, the students should have a good perspective on what they have already learned and what they still need to learn to complete the project.
This 1:31 long video explains how the land masses of the earth were put together before. the big fusion continent is called pangea. since there are tectonic plates that are constantly moving, pangea split apart over time. the tectonic plates are also responsible for landforms and earthquakes. The video moves rapidly so the teacher may wish to stop it to show the movements more clearly.
Op het einde van deze les kun je inhoudsvragen over het historische, technische en affectieve aspect van Britse postcodes beantwoorden.