Watch: The Physics of Time Explained in Under 3 Minutes. In Brief Henry from Minute Physics takes a stab at explaining the concept of time in physics with simple graphics in his sketch on Youtube.
Many people find the concepts in physics challenging to wrap their head around. Visual aids and explanations can definitely help, though. The Youtube Channel Minute Physics videos do just that. In the video featured below, Henry from MinutePhysics explains the relativity of time in under three minutes. With a clever demonstration that pits two giraffe owners against one another, Henry explains how, if two people are positioned at different vantage points, should they take a measurement of something (in this example, a giraffe) the differing angles would make it seem as though the sizes are different. As those vantage points and angles may affect our perception of size, Henry also explains how velocity affects our perception of time. BBC Earth - Timeline - The Earth formed from a vast gas and dust cloud.
What causes addiction? How the choices you make can affect your genes - Carlos Guerrero-Bosagna. The question of how an adult organism unfolds after the merging of two gametes have been around since Aristotelian times.
Adherents of ‘preformation’ answered this question by stating that all the components needed for the embryo to become an adult individual were already inside the gametes. On the other side of the spectrum, those supporting ‘epigenesis’ thought that gametes and embryonic cells needed to interact with external signals in order to generate an adult individual. This site from Stanford: Epigenesis and Preformationism provides some information on the topic. When the genomic era arrived, Conrad Waddington, a British geneticist, wanted to explain the meaning of epigenesis with genes. He questioned ‘how genes interact with their products and the environment to bring phenotypes into being?’ Science. Your insight into science. Wildscreen. Science Kids. Open Education. Natural Sciences.
Climate Change Education Found Lacking. How climate change is being taught to American middle- and high-school students is severely lacking, according to a recent nationwide survey.
The National Center for Science Education (NCSE), along with the Penn State University Survey Research Center, interviewed more than 1,500 teachers and found that "three out of five teachers were unaware of, or actively misinformed about, the near total scientific consensus on climate change. " In addition, said NCSE programs and policy director Josh Rosenau, "At least one-in-three teachers bring climate change denial into the classroom, claiming that many scientists believe climate change is not caused by humans. "Worse, half of the surveyed teachers have allowed students to discuss the supposed 'controversy' over climate change without guiding students to the scientifically supported conclusion. " The survey also found that teachers who want to teach climate change have a hard time accessing available information. Opposing view Other findings. Chemistrymovies. The Energy Story - Introduction.
Energy is one of the most fundamental parts of our universe.
We use energy to do work. Energy lights our cities. Energy powers our vehicles, trains, planes and rockets. Energy warms our homes, cooks our food, plays our music, gives us pictures on television. Energy powers machinery in factories and tractors on a farm. Energy from the sun gives us light during the day. Everything we do is connected to energy in one form or another. Energy is defined as: "the ability to do work. " When we eat, our bodies transform the energy stored in the food into energy to do work. Cars, planes, light bulbs, boats and machinery also transform energy into work. Atomic Size Matters — Atomic Comics. What's this book about?
Atomic Size Matters is a comic book that explains one way scientists are trying to understand the complexity sometimes found in crystalline compounds. Crystals are solid materials with very neatly organized atoms that form a repeating pattern. Though we know a lot more about crystalline compounds than ever before, we still don't have a great way to predict when a compound should form a simple pattern or a more complicated one. Figuring this out could lead to new materials that we design very precisely to optimize their properties. But we are still at stage one, forming a theory about the advantages of complex arrangements over simple ones. The comic book takes the reader through these motivations, to the introduction of our theory of Chemical Pressure, all the way to a fascinating case study of a material called a quasicrystal. The book itself is printed on high quality paper, with perfect binding in the style of a trade paperback comic book.
How'd this all begin? The science of skin color - Angela Koine Flynn. Online Learning Resources.