Virtual Fetal Pig Dissection | Whitman College (philippe) Welcome to the Whitman College Biology Department's Virtual Pig Dissection (VPD)! This site is designed as a supplement to laboratory dissections exploring introductory mammalian anatomy and physiology — it is basic and many details have been omitted for clarity. We hope that it is suitable for AP Biology students or for students of introductory anatomy and physiology at the college level. We have revised this site to improve the learning experience and accessibility. Please see the "About" page for more details and contact information. Within this site, you can navigate to any chapter from the links at the left.
Global Climate Change Is the global climate changing? Is the world getting warmer? If you look at the graph below of global temperature changes over the past 150 years, the answer would have to be yes. But what if we look at the past 1,000 years, 100,000 years, or more? And why should YOU care if indeed our world is getting warmer? The full story is very complicated. We invite you to actively investigate for yourself the facts, concepts, and theories. We hope you can join us in this important mission of learning, understanding, and acting! What do we know about the Earth's climate in the past? Let's start by examining Global Temperature History… How do we know what the temperature of the Earth was like thousands and millions of years ago when there were no thermometers? We can estimate temperature by other means. What determines global temperature? The Earth is heated by the Sun. So why does global temperature change? Are there other factors that affect global temperature? What do people have to do with this?
Groundwater facts - National Groundwater Association Groundwater is the water that fills cracks and other openings in beds of rocks and sand. Each drop of rain that soaks into the soils moves downward to the water table, which is the water level in the groundwater reservoir. Groundwater does not normally occur in underground streams, lakes, or veins. Groundwater is found in soils and sands able to retain the water — much like a sponge holds water. Some 2.78 million trillion gallons of groundwater, 30.1 percent of the world's freshwater, are estimated for the entire planet of Earth. [1] Of the total 349 billion gallons of freshwater the United States withdraws each day, groundwater is estimated to be 79.6 billion gallons, or 26 percent. [2] There is a relationship between groundwater and surface water. About a quarter of all U.S. rainfall becomes groundwater. Groundwater is a significant water supply source — the amount of groundwater storage dwarfs our present surface water supply. Groundwater is a renewable resource. [8] Ibid. [14] U.S.
ARKive - Endangered Species Wildscreen's Arkive project was launched in 2003 and grew to become the world's biggest encyclopaedia of life on Earth. With the help of over 7,000 of the world’s best wildlife filmmakers and photographers, conservationists and scientists, Arkive.org featured multi-media fact-files for more than 16,000 endangered species. Freely accessible to everyone, over half a million people every month, from over 200 countries, used Arkive to learn and discover the wonders of the natural world. Since 2013 Wildscreen was unable to raise sufficient funds from trusts, foundations, corporates and individual donors to support the year-round costs of keeping Arkive online. As a small conservation charity, Wildscreen eventually reached the point where it could no longer financially sustain the ongoing costs of keeping Arkive free and online or invest in its much needed development. Therefore, a very hard decision was made to take the www.arkive.org website offline in February 2019.
DNA Structure - Contents page (Fabien) An Interactive Animated Nonlinear Tutorial by Eric MartzAdapted for using Jmol instead of Chime, by Angel Herráez Part of Biomodel website by Angel Herráez, Univ. de Alcalá (Spain) Disponible también en español. Também disponível em português. This version 4.3 works in any Java-compatible browser. If you prefer using Chime for molecular models, the page using it is still available, with equivalent content and functionality. This tutorial is designed to complement Biology or Biochemistry and Molecular Biology books, so it is not by itself a complete introduction to DNA structure. Before proceeding, check that your browser has Java installed and can use the Jmol software: This tutorial is designed to complement an introduction to DNA, by providing tools for a self-directed exploration. You can request a copy of this tutorial for off-line use; once you have your own copy on your computer's hard disk, you can use it without an Internet connection (and it will run faster). Version history
One Race, Every Medalist Ever - Interactive Graphic Sources: "The Complete Book of the Olympics" by David Wallechinsky and Jaime Loucky, International Olympic Committee; Amateur Athletic Assocation; Photographs: Chang W. Lee/The New York Times, Getty Images, International Olympic Committee By KEVIN QUEALY and GRAHAM ROBERTS Usain Bolt vs. 116 years of Olympic sprinters Based on the athletes’ average speeds, if every Olympic medalist raced each other, Usain Bolt (the London version) would win, with a wide distribution of Olympians behind him. Usain Bolt2012 Meters behind 2012 Bolt Medals by country This chart includes medals for the United States and Australia in the "Intermediary" Games of 1906, which the I.O.C. does not formally recognize. Notable winners of the 100-meter sprint Archie Hahn United States The “Milwaukee Meteor” also won the 50-meter dash and the 200-meter dash in 1904. Jesse Owens Also set the world record in the 4x100 relay and Olympic records in the long jump and 200-meter dash. Jim Hines Carl Lewis
AQUIFERS – THE WATER BEARERS - WaterInCrisis.com There are three types of aquifers and they are unconfined, confined and perched. In the unconfined aquifers, the water table is located at the outermost part of the aquifer. The water in the confined aquifer is usually the water that receives runoff, snowmelt etc. The confined aquifer has confining layers between the water level and the ground level. The final type of aquifer is known as the perched aquifer. Figure 1 Schematic of confined and unconfined aquifers. Source: USGS Figure 2 Schematic of perched aquifer. Aquifers are recharged (re-filled) by both natural and man-made means. Figure 3 Schematic showing various means by which aquifers are recharged. The Ogallala Aquifer The largest aquifer in the world is known as “The Great Ogallala Aquifer” and it is located in the United States. However, we are experiencing an extreme issue with the massive Ogallala because the water source is running dry. Environmental Technology · Degrade the aquifer
The Four Seasons Reason for the Four Seasons Written for the KidsKnowIt Network by: Debora Dyess Seasons are created by two very important events – the rotation of the Earth that gives us day and night, and the rotation of the Earth around the sun that gives us our year. The orbit of the Earth around the sun is elliptical (a squashed circle), and the planet does not sit straight up and down. Because of this, the Northern Hemisphere of the planet has summer while the Southern Hemisphere experiences winter. Because seasons are based on the rotation of the planet around the sun, the seasons change at the same time every year, even though the two halves of the planet experience opposite seasons! Seasons change on or around the 21st of four months: June, September, December and March. Seasons are important all over the Earth, and each part of the planet experiences some type of change as their pole tips toward the sun for three months out of the year.
Pascaline On your bike: how muscles respond to exercise We all know that exercise makes us fitter and healthier – but what changes take place in our cells to make this happen? Next time you are working out in the gym, or pounding the streets running or jogging, ponder this: the idea of ‘muscle memory’ – that today’s exercise has effects on our muscles years from now – has never been demonstrated scientifically. Does it really exist, and if so, how does it work? These are some of the questions we hope to answer in our on-going research, which aims to pin down the changes that occur in muscles when we exercise, and how our muscles ‘know’ to respond differently to, say, endurance training as opposed to strength training. Helping us to investigate these questions is a large team of volunteers. We assess the fitness of our volunteers before and after participation in the studies by measuring their maximal oxygen uptake. Of course, we already know that regular exercise produces health benefits. Building mitochondria Epigenetic factors Acknowledgement
Physics Animations by Dr. Michael R. Gallis Penn State Schuylkillmrg3@psu.edu Select a category from the menu at left to browse the catalogue of animations by category. Most animations are 512 by 384 pixel avi files and are generally several megabytes long. Small screenshots are provided, and the user may view the animation in three ways: direct link to the media file, and two versions of a link to a page with the animation embeded in a web page with a brief comment on the animation. Project Page The animations project has its very own YouTube Channel. CWIS Portal to the Animations. A blog has been created to discuss the creation of the animations. -=Papers and Presentations=- Artificial Video for Video Analysis, MichaelR. 3-D Animations for Introductory Electromagnetism, MichaelR. Animations for Introductory Courses, Dr. See also Visual Mathematics by Dr.
Aquifers and Groundwater, from USGS Water Science for Schools I hope you appreciate my spending an hour in the blazing sun to dig this hole at the beach. It is a great way to illustrate the concept of how, below a certain depth, the ground, if it is permeable enough to hold water, is saturated with water. The upper surface of this zone of saturation is called the water table. Groundwater is one of our most valuable resource—even though you probably never see it or even realize it is there. When a water-bearing rock readily transmits water to wells and springs, it is called an aquifer. In the diagram below, you can see how the ground below the water table (the blue area) is saturated with water. Sometimes the porous rock layers become tilted in the earth. A relationship does not necessarily exist between the water-bearing capacity of rocks and the depth at which they are found. Pumping can affect the level of the water table Groundwater occurs in the saturated soil and rock below the water table. Water movement in aquifers