A Graph of the Laziest Countries in the World (Hooray! We're Not #1) - Derek Thompson Congratulations, Maltese women: You are the world's most physically inactive demographic! Take a bow. Better yet, take a walk. From country-to-country, inactivity rises with age, is higher in women than in men, and rises in higher-income countries, according to a new study on idleness in The Lancet. Here's a map of the world's sloth, via The Economist. Inactivity might rise with income, but some of the world's most inactive groups are women in countries with barriers to female employment, such as Libya and Saudi Arabia. What about America, the alleged king of couch potatoes?
How did life originate? How did life originate? Living things (even ancient organisms like bacteria) are enormously complex. However, all this complexity did not leap fully-formed from the primordial soup. Instead life almost certainly originated in a series of small steps, each building upon the complexity that evolved previously: Simple organic molecules were formed. Simple organic molecules, similar to the nucleotide shown below, are the building blocks of life and must have been involved in its origin. Multicellularity evolved.
Revised AP Biology Exam | Question Writing | Clear Biology While attending the AP Annual Conference last week I was able to sit in on a session hosted by the Educational Testing Service (ETS). ETS will be writing the new AP Biology Exam debuting the spring of 2013. The session offered insights into the method in which exam questions will be written. A new practice exam will be released each year.Questions are limited to the information in the 149 Learning Objectives of the Curriculum Framework. At the time of writing this post, a practice version of the revised AP Biology Exam has not been posted on College Board website. Information regarding the significance of these tables is mysteriously absent, yet they contain the formula for writing the new AP Biology Exam questions. According to ETS, all new exam questions will be written using the language in the Learning Objectives. Consider the learning objective below. The phrase “create a phylogenetic tree or simple cladogram” refers to the science skill of using models to represent information.
Free Science Fair Project Ideas for Grades K-12 Please ensure you have JavaScript enabled in your browser. If you leave JavaScript disabled, you will only access a portion of the content we are providing. <a href="/science-fair-projects/javascript_help.php">Here's how.</a> Help Me Find a Project Use the Topic Selection Wizard tool: Answer a short questionnaire about your interests & hobbies It uses your responses to recommend ideas you will enjoy Browse the Project Ideas Index Listed below are all of the different areas of science where we offer Project Ideas. Search the Project Ideas Library Science Buddies has over 1,150 Project Ideas in over 30 areas of science. Buy Project Kits Each kit contains everything you need to do the project Available for several dozen popular Project Ideas Proceeds help support Science Buddies
Biology Review Games Science games dealing with the science of life or living matter in all its forms and phenomena, especially with reference to origin, growth, reproduction, structure, and behavior. Adaptations to Life Processes Active and passive transport, aerobic respiration, autotrophs vs. heterotrophs, auxins and tropisms, mechanical & chemical Digestion, nerve control, and photosynthesis. Ecology Biomes, energy relationships, human effect on environment, niches, nutritional relationships, and succession. Evolution Darwin’s theory and natural selection, evidence and variations caused by evolution, and heterotroph hypothesis. Human Physiology Blood, types, genotypes, vessels, carbohydrates, digestive, endocrine, excretory, heart & circulation of blood, immune system response, nervous system, lungs & respiratory system, skeleton, muscles, and cartilage. More Biology Games Visit our sister site, reviewgamezone.com to see more games on this topic!
Study: Smell May Be Caused by Quantum Vibrations Could quantum physics explain the human sense of smell? A new study published in the Proceedings of the National Academy of Sciences (PNAS) lends credence to the theory that our sense of smell is based on sensing the vibrations caused by energy transfer at the subatomic level. The basis of the theory is that the structure of molecules is similar to that of balls held together by springs. When an electron hits a molecule, it loses quanta or discrete packets of energy. This would seem to fly in the face of the previous understanding of smell, which was based on the shape of the molecule — the so-called “lock and key” theory. Further studies using ‘nanowires’ have shown that this kind of molecular vibration can be observed and measured, opening the possibility for high-tech electronic noses. (PNAS via BBC, photo Luke Gattuso)
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