iScience Teacher
Follow
Find
4.0K views | +0 today
 
Scooped by John Purificati
onto iScience Teacher
Scoop.it!

FREE Chemistry Materials, Lessons, Worksheets, PowerPoint for High School Chemistry

FREE Chemistry Materials, Lessons, Worksheets, PowerPoint for High School Chemistry | iScience Teacher | Scoop.it
chemistry, high school chemistry, powerpoint, powerpoint presentations, chemistry worksheets, chemistry labs, chemistry materials, free chemistry materials, unit5.org/chemistry
more...
No comment yet.

From around the web

iScience Teacher
Collection of Resources for Today's Science Teachers
Your new post is loading...
Your new post is loading...
Rescooped by John Purificati from Technology to Teach
Scoop.it!

Ten Websites for Science Teachers

Ten Websites for Science Teachers | iScience Teacher | Scoop.it
Blogger Eric Brunsell takes us on a tour of his favorite online resources for science teachers.

Via Amy Burns
more...
Amy Burns's curator insight, October 14, 6:41 AM

Updated list of sites for science teachers.

Scooped by John Purificati
Scoop.it!

The Human Brain (HD full documentary) - YouTube

The Human Brain (HD full documentary) Using simple analogies, real-life case studies, and state-of-the-art CGI, this special shows how the brain works, expla...
more...
No comment yet.
Rescooped by John Purificati from Linking Literacy, Research, and Practice
Scoop.it!

3 Useful Resources for Science Activities and Lesson Plans

3 Useful Resources for Science Activities and Lesson Plans | iScience Teacher | Scoop.it
September 18, 2014
Today's post features two practical resources for science teachers. These are websites that  provide a wide variety of science activities and presentations that you can try...

Via Dean J. Fusto
more...
No comment yet.
Rescooped by John Purificati from Amazing Science
Scoop.it!

Physicists find a new way to push electrons around

Physicists find a new way to push electrons around | iScience Teacher | Scoop.it
Discovery might ultimately lead to new, more energy-efficient transistors and microchips.”When moving through a conductive material in an electric field, electrons tend to follow the path of least resistance — which runs in the direction of that field.But now physicists at MIT and the University of Manchester have found an unexpectedly different behavior under very specialized conditions — one that might lead to new types of transistors and electronic circuits that could prove highly energy-efficient.They’ve found that when a sheet of graphene — a two-dimensional array of pure carbon — is placed atop another two-dimensional material, electrons instead move sideways, perpendicular to the electric field. This happens even without the influence of a magnetic field — the only other known way of inducing such a sideways flow.What’s more, two separate streams of electrons would flow in opposite directions, both crosswise to the field, canceling out each other’s electrical charge to produce a “neutral, chargeless current,” explains Leonid Levitov, an MIT professor of physics and a senior author of a paper describing these findings this week in the journal Science.The exact angle of this current relative to the electric field can be precisely controlled, Levitov says. He compares it to a sailboat sailing perpendicular to the wind, its angle of motion controlled by adjusting the position of the sail.Levitov and co-author Andre Geim at Manchester say this flow could be altered by applying a minute voltage on the gate, allowing the material to function as a transistor. Currents in these materials, being neutral, might not waste much of their energy as heat, as occurs in conventional semiconductors — potentially making the new materials a more efficient basis for computer chips.“It is widely believed that new, unconventional approaches to information processing are key for the future of hardware,” Levitov says. “This belief has been the driving force behind a number of important recent developments, in particular spintronics” — in which the spin of electrons, not their electric charge, carries information.
Via Dr. Stefan Gruenwald
more...
No comment yet.
Rescooped by John Purificati from Learning*Education*Technology
Scoop.it!

Sample Popsicle Catapult for STEM Class

Sample Popsicle Catapult for STEM Class | iScience Teacher | Scoop.it
Half of my 4th and 5th grade STEM students (those not working in a center in our "Maker Studio") are 2 days into a 4 day unit on creating popsicle catapults, which my district STEM mentor and peer ...

Via Skip Zalneraitis
more...
No comment yet.
Rescooped by John Purificati from elearning stuff
Scoop.it!

Moodle plugins: Chemical Structures and Reactions Editor

Moodle plugins: Chemical Structures and Reactions Editor | iScience Teacher | Scoop.it
Chemical Structures and Reactions Editor: by Carl LeBlond.  Easily draw and insert chemical structures... http://t.co/HpnCrghka1 #moodle

Via Daniel Arndt Alves, Miloš Bajčetić, steve batchelder
more...
No comment yet.
Rescooped by John Purificati from Educational Technology and Mobile Lerarning
Scoop.it!

5 Effective Questions You Should Be Able to Ask Your Students ~ Educational Technology and Mobile Learning

5 Effective Questions You Should Be Able to Ask Your Students ~ Educational Technology and Mobile Learning | iScience Teacher | Scoop.it

Via Educatorstechnology
more...
No comment yet.
Rescooped by John Purificati from Sustainability Science
Scoop.it!

▶ 7 Billion: How Did We Get So Big So Fast? - YouTube

http://skunkbear.tumblr.com It was just over two centuries ago that the global population was 1 billion — in 1804. But better medicine and improved agricultu...

Via PIRatE Lab
more...
No comment yet.
Rescooped by John Purificati from Amazing Science
Scoop.it!

A possible signal from dark matter?

A possible signal from dark matter? | iScience Teacher | Scoop.it

Galaxies are often found in groups or clusters, the largest known aggregations of matter and dark matter. The Milky Way, for example, is a member of the "Local Group" of about three dozen galaxies, including the Andromeda Galaxy located about 2 million light-years away. Very large clusters can contain thousands of galaxies, all bound together by gravity. The closest large cluster of galaxies to us, the Virgo Cluster with about 2000 members, is about 50 million light-years away. The Perseus Cluster is one of the most massive objects in the Universe with thousands of galaxies immersed in an enormous cloud of superheated gas.

 

The space between galaxies is not empty. It is filled with hot intergalactic gas whose temperature is of order ten million kelvin, or even higher. The gas is enriched with heavy elements that escape from the galaxies and accumulate in the intracluster medium over billions of years of galactic and stellar evolution. These intracluster gas elements can be detected from their emission lines in X-ray, and include oxygen, neon, magnesium, silicon, sulfur, argon, calcium, iron, nickel, and even chromium and manganese.

 

The relative abundances of these elements contain valuable information on the rate of supernovae in the different types of galaxies in the clusters since supernovae make and/or disburse them into the gas. Therefore it came as something of a surprise when CfA astronomers and their colleagues discovered a faint line corresponding to no known element. Esra Bulbul, Adam Foster, Randall Smith, Scott Randall and their team were studying the averaged X-ray spectrum of a set of seventy-three clusters (including Virgo) looking for emission lines too faint to be seen in any single one when they uncovered a line with no known match in a particular spectral interval not expected to have any features.

 

The scientists propose a tantalizing suggestion: the line is the result of the decay of a putative, long-sought-after dark matter particle, the so-called sterile neutrino. It had been suggested that the hot X-ray emitting gas in a galaxy cluster might be a good place to look for dark matter signatures, and if the sterile neutrino result is confirmed it would mark a breakthrough in dark matter research (it is of course possible that it is a statistical or other error). Recent unpublished results from another group tend to support the detection of this feature; the team suggests that observations with the planned Japanese Astro-H X-ray mission in 2015 will be critical to confirm and resolve the nature of this line.

 

More information: "Detection of an Unidentified Emission Line in the Stacked X-Ray Spectrum of Galaxy Clusters," Esra Bulbul, Maxim Markevitch, Adam Foster, Randall K. Smith, Michael Loewenstein, and Scott W. Randall, ApJ 789, 13, 2014.


Via Dr. Stefan Gruenwald
more...
No comment yet.
Scooped by John Purificati
Scoop.it!

Daily #Science

Daily #Science | iScience Teacher | Scoop.it
Daily #Science, by Marco Cardinale: A collection of scientific news from social media (Daily #Science is out!
more...
No comment yet.
Scooped by John Purificati
Scoop.it!

News - The complicated science of getting struck by lightning - The Weather Network

News - The complicated science of getting struck by lightning - The Weather Network | iScience Teacher | Scoop.it
Lucky for me, I both heard the sizzle of the bolt as it arced by my head and saw the blinding flash of the main strike as the circuit between cloud and ground was completed.
more...
No comment yet.
Rescooped by John Purificati from Amazing Science
Scoop.it!

NASA: Earth escaped a near-miss solar storm in 2012

NASA: Earth escaped a near-miss solar storm in 2012 | iScience Teacher | Scoop.it

Back in 2012, the Sun erupted with a powerful solar storm that just missed the Earth but was big enough to "knock modern civilization back to the 18th century," NASA said. The extreme space weather that tore through Earth's orbit on July 23, 2012, was the most powerful in 150 years, according to a statement posted on the US space agency website Wednesday.

 

However, few Earthlings had any idea what was going on. "If the eruption had occurred only one week earlier, Earth would have been in the line of fire," said Daniel Baker, professor of atmospheric and space physics at the University of Colorado. Instead the storm cloud hit the STEREO-A spacecraft, a solar observatory that is "almost ideally equipped to measure the parameters of such an event," NASA said. Scientists have analyzed the treasure trove of data it collected and concluded that it would have been comparable to the largest known space storm in 1859, known as the Carrington event. It also would have been twice as bad as the 1989 solar storm that knocked out power across Quebec, scientists said.

 

"I have come away from our recent studies more convinced than ever that Earth and its inhabitants were incredibly fortunate that the 2012 eruption happened when it did," said Baker. The National Academy of Sciences has said the economic impact of a storm like the one in 1859 could cost the modern economy more than two trillion dollars and cause damage that might take years to repair. Experts say solar storms can cause widespread power blackouts, disabling everything from radio to GPS communications to water supplies -- most of which rely on electric pumps.

 

They begin with an explosion on the Sun's surface, known as a solar flare, sending X-rays and extreme UV radiation toward Earth at light speed. Hours later, energetic particles follow and these electrons and protons can electrify satellites and damage their electronics.

 

Next are the coronal mass ejections, billion-ton clouds of magnetized plasma that take a day or more to cross the Sun-Earth divide. These are often deflected by Earth's magnetic shield, but a direct hit could be devastating.


Via Dr. Stefan Gruenwald
more...
Tekrighter's curator insight, July 26, 10:44 AM

I have touched on this topic before in my blog (Is Technology a Trap for Humanity? - http://tekrighter.wordpress.com/page/3/). Perhaps it's time for an update.

Rescooped by John Purificati from DIGI-TOOLS - The Intersection of Tech Integration, Innovation, and Instruction
Scoop.it!

The Best iPad Apps in Art Education | Listly List

The Best iPad Apps in Art Education | Listly List | iScience Teacher | Scoop.it
What iPad Apps are most useful for student learning and engagement? We have listed our top apps that promote CREATIVITY and ORIGINALITY. Please help rank the most useful, leave a comment, and add to this list of the BEST apps for art education! | Dropbox, ArtRage, iMovie, Percolator, Amaziograph, iMotion HD, SketchBook Express, Paper by FiftyThree, Evernote, and Keynote

Via Tom D'Amico (@TDOttawa) , Dean J. Fusto
more...
LORENAMEJIA's curator insight, September 19, 3:25 PM

agregar su visión ...

Barbara Monica Pérez Moo's curator insight, September 19, 3:29 PM

Los diseñadores gráficos, diseñadores digitales, seguro son expertos en esto.

Rescooped by John Purificati from Digital Identity and Access Management
Scoop.it!

Soylent: Food of the future?

Watch as we unveil what may be the food of the future – Soylent - and learn about its nutritional implications. Watch more videos: http://www.ndtv.com/video?yt.

Via Pekka Puhakka, TechinBiz, Frank J. Klein
more...
No comment yet.
Rescooped by John Purificati from Future of Learning
Scoop.it!

How to Get Students to Work Harder

How to Get Students to Work Harder | iScience Teacher | Scoop.it
Some kids have an understandable worry that they don't belong in school. According to new research, changing this belief can help turn low-achievers into motivated students.

Via Terese Bird
more...
No comment yet.
Rescooped by John Purificati from iEduc
Scoop.it!

Home - Google Science Fair 2014

Home - Google Science Fair 2014 | iScience Teacher | Scoop.it
Google Science Fair is a global online competition open to students from 13 to 18 years old. What do you want to change?

Via NikolaosKourakos
more...
No comment yet.
Rescooped by John Purificati from Technology to Teach
Scoop.it!

Free Technology for Teachers: The Physics of Cycling, Running, and Swimming

Free Technology for Teachers: The Physics of Cycling, Running, and Swimming | iScience Teacher | Scoop.it

Via Amy Burns
more...
Amy Burns's curator insight, September 3, 6:52 AM

Fun "spin" on science.

Rescooped by John Purificati from Amazing Science
Scoop.it!

Seth Shostak, leading expert at SETI, is optimistic about finding signs of extraterrestrial life this century

Seth Shostak, leading expert at SETI, is optimistic about finding signs of extraterrestrial life this century | iScience Teacher | Scoop.it

We are going to find life in space in this century,' Dr. Seth Shostak, Senior Astronomer at the Search for Extra-Terrestrial Intelligence Institute (SETI) said emphatically at the European Commission Innovation Convention. 'There are 150 billion galaxies other than our own, each with a few tens of billions of earth-like planets. If this is the only place in the universe where anything interesting happening then this is a miracle. And 500 years of astronomy has taught us that whenever you believe in a miracle, you're probably wrong.'

 

How will discover life in space? Dr Shostak sees it as a 'three-horse race' which will probably be won over the next 25 years. We will either find it nearby, in microbial form, on Mars or one of the moons of Jupiter; we will find evidence for gases produced by living processes (for example photosynthesis) in the atmospheres of planets around other stars; or Dr Shostak and his team at SETI will pick up signals from intelligent life via huge antennas.

 

Dr. Suzanne Aigrain, Lecturer in Astrophysics at Oxford University, who studies extrasolar planets or exoplanets (planets around other stars than the sun), represents horse number two in the race. Speaking at the Convention, Dr Aigrain noted that, based on her studies, she would also bet that we are not alone. 'We are very close to being able to say with a good degree of certainty that planets like the Earth, what we call habitable planets, are quite common in the universe. That's why when asked if I believe there's life on other planets, I raise my hand and I do so as a scientist because the balance of probability is overwhelmingly high.'

 

Dr. Aigrain, and the groups that she works with, have so far been using light - electromagnetic radiation - as their primary tool to look for planets around stars other than the sun. Habitable planets are defined as those that are roughly the size of the earth where the surface temperature is suitable for liquid water to exist on the surface. The life 'biomarkers' that Dr. Aigrain and her colleagues look for are trace gases in the atmospheres of the exoplanets that they think can only be there if they are being produced by a biological source like photosynthesis.

 

Dr Shostak and SETI, meanwhile, seek evidence of life in the universe by looking for some signature of its technology. If his team does discover radio transmissions from space, Dr Shostak is quite certain that they will be coming from a civilisation more advanced than our own. 'Why do I insist that if we find ET, he/she/it will be more advanced than we are? The answer is that you're not going to hear the Neanderthals. The Neanderthal Klingons are not building radio transmitters that will allow you to get in touch.'

 

If we do find life on other planets or intercept a radio signal, what are the consequences? Finding a microbe that isn't an earthly microbe will tell us a lot about biology, but there will also be huge philosophical consequences. In Dr Shostak's words, 'It literally changes everything.'


Via Dr. Stefan Gruenwald
more...
CineversityTV's curator insight, September 3, 9:36 PM

it seems they are way behind in science

Rescooped by John Purificati from The NewSpace Daily
Scoop.it!

SpaceX now targeting Wednesday launch from Cape

SpaceX now targeting Wednesday launch from Cape | iScience Teacher | Scoop.it

SpaceX has confirmed it is now targeting early Wednesday for launch of the AsiaSat 6 commercial communications satellite from Cape Canaveral Air Force Station, a day later than previously planned.

 

The launch is set for 12:50 a.m. Wednesday from Launch Complex 40, at the opening of a window to 4:05 a.m.

 

The weather outlook is uncertain given the potential development of a tropical storm that could influence local conditions. An early forecast predicts a 60 percent chance of favorable conditions.

 


Via Stratocumulus
more...
No comment yet.
Scooped by John Purificati
Scoop.it!

App Shopper: Science Lab for Kids - funny video tutorials experiences and scientific discoveries for your child (Education)

App Shopper: Science Lab for Kids - funny video tutorials experiences and scientific discoveries for your child (Education) | iScience Teacher | Scoop.it
Mac Apps, Mac App Store, iPad, iPhone and iPod touch app store listings, news, and price drops (#joemacintosh Science Lab for Kids - funny video tutorials experiences and scientific discoveries...
more...
No comment yet.
Scooped by John Purificati
Scoop.it!

Adults Attempt To Do Middle School Science Experiments

How much do you remember from science class? Share on Facebook: http://on.fb.me/1uPs8rA Like BuzzFeedVideo on Facebook: Share on Twitter: http://bit.ly/1zDBAx9 MUSIC Pop Vibration Licensed...
more...
No comment yet.
Rescooped by John Purificati from Amazing Science
Scoop.it!

NASA - our Blue Dot Seen from Space: Incredible Pictures of a Warming World

NASA - our Blue Dot Seen from Space: Incredible Pictures of a Warming World | iScience Teacher | Scoop.it

Flood. Drought. Heat waves. Ice melt. The impact of a warming world is being manifested in a variety of ways, and we can see it from space. Browse through our gallery of pictures taken by NASA satellites looking down at planet Earth.

 

Less than a year after a devastating 2003 heat wave killed over 37,000 people across Europe, another heat wave struck the region. On July 1, 2004, this image from NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) recorded land surface temperatures of 138°F (59°C) in Spain. In this false-color image, red represents the warmest temperatures, yellow is intermediate, and light and dark blue are progressively cooler. Air temperatures in both countries soared over 104°F (40°C). Three days after this image was taken, Spain set a new air temperature record for the nation: 117°F (47°C). Climate models predict more extreme weather events, including heat waves, in the coming decades due to man-made climate change.

 

Found at the intersection of four different countries in West Africa, Lake Chad was once one of the African continent's largest bodies of fresh water, close in surface area to North America's Lake Erie. But today it is a ghost of its former self, reduced to only about 1/20th its former size in just four decades, thanks to prolonged drought and human demand for water.

 

A warming world also makes heavily populated coastal areas more vulnerable to flooding: higher global temperatures produce warmer seawater, which expands and causes a rise in sea level. Approximately 400 million people live within 20 meters (0.01 miles) of sea level and 20 km (12 miles) of a coast; modest increases in sea level could displace millions of people.

 

Wildfire activity in the western U.S. has increased markedly since the mid-1980s, with more frequent large fires and longer fire seasons. Climate models predict increased wildfire risk across many areas of the globe in coming decades.


Via Dr. Stefan Gruenwald
more...
No comment yet.
Rescooped by John Purificati from Social Media and Healthcare
Scoop.it!

Smartphones Are the New Stethoscopes

Smartphones Are the New Stethoscopes | iScience Teacher | Scoop.it

Among the many instruments your doctor uses — stethoscope, thermometer, scale — the most valuable one may be in her pocket: a smartphone.  

Due to increasingly compressed office visits, patients are becoming more active participants in managing their healthcare, and a new generation of Internet-savvy physicians is using social media to improve the way they run their practices. The goal isn’t to replace face time with patients but to provide teaching tools, stay abreast of breaking medical research, and communicate more efficiently with patients.

Currently, 67 percent of physicians use social media — sites like Facebook, YouTube, Twitter, and Pinterest — for professional purposes, according to a recent report released by the Federation of State Medical Boards. And patients are taking their relationships with their medical providers online. One Yahoo Facebook user reported that her nurse practitioner gives advice over the social networking site, while another said sharing photos and videos can even save her a trip to the office.  

“Social media is changing the way people give and receive information and, as a result, the medical profession is changing, too,” Lee Aase, social media director at the Mayo Clinic, tells Yahoo Health. “Twitter has been invaluable. For example, if a patient tweets a photo of their symptoms to a doctor, he or she probably wouldn’t diagnose them online, but they could tweet back a link to a resource or a number to call to set up an in-person visit.” The clinic was one of the earlier organizations to adapt to social media and hosts regular “tweet camps” and residencies where doctors learn to use Twitter responsibly. 

On the extreme end, surgeons are even live-tweeting their operations (with patient permission) to educate medical students and demystify the experience for prospective patients and nervous family members in the waiting room. Three such operations took place in 2009. One at Henry Ford Hospital in Michigan, where doctors removed a cancerous tumor from a man’s kidney; another at Aurora Health Care in Wisconsin, where orthopedic surgeons performed a double-knee replacement surgery; and a third at Sherman Hospital in Illinois, where a woman’s uterus was removed. Two more occurred in 2012 at Houston’s Memorial Hermann Hospital where doctors removed a brain tumor from a 21-year-old patient. Details of every snip and stitch were live-tweeted and photos and videos were posted on Pinterest and YouTube, ultimately reaching an audience of 14.5 million people. Several months prior, the hospital was the first to live-tweet open-heart surgery, broadcasting to 125 million people.

“In these cases, the physician will usually wear a headset that takes photos and videos and dictate his tweets to a public relations rep sitting in the operating room,” Kevin Pho, MD, co-author of “Establishing, Managing, and Protecting Your Online Reputation: A Social Media Guide for Physicians and Medical Practices,” tells Yahoo Health. “It’s a great way for surgeons to be transparent, as long as Twitter doesn’t cause distractions.” Pho uses his own blog to “share stories from behind the curtain” — clarify medical misinformation, publish posts written by his colleagues, and answer common patient questions such as, “Why is my doctor so late to appointments?”

Physicians are also using YouTube to publicize their skill sets and dehumanize the doctor-patient relationship. “If a doctor has a certain specialty, posting a YouTube video enables them to highlight their expertise for prospective patients,” says Aase. “It’s also a way for patients to get acquainted with their doctor so the upcoming visit feels more personable.” The videos can also serve as a time saver — by watching a two-minute segment on say, car-seat safety or vaccination basics, patients gain baseline knowledge and, as a result, use their office visit time more efficiently.

For practices such as MacArthur OB/GYN in Irving, Texas, patients use the group’s Facebook page to foster a sense of community by uploading funny photos from doctor visits and get invitations for doctor-patient meet-and-greets. The group’s Twitter account also boasts nearly 4,000 followers who can get answers to questions such as, “Is it safe to fly while pregnant?”

There are also a slew of apps that serve both patients and doctors. “First Derm” users can diagnose a sexually transmitted disease within 24 hours for a $40 fee, according to TechCrunch. That’s more expensive than a co-pay, the website points out, but it saves people the time and potential embarrassment of schlepping to an office visit. Users snap two photos of the area (one close up, the other from far away), then fill out an online form (identifying details are not required) and provide a credit card number. The app claims that more than 70 percent of its cases can be treated with over-the-counter medication and the rest require office visits.

The app “Figure 1” is also gaining popularity among the medical set. Dubbed “Instagram for doctors,” it allows professionals to swap and discuss medical photos. The app’s founder, Canadian internist Josh Landy, MD, told Business Insider that his colleagues now have the ability to view photos of rare diseases on real patients whose identities are obscured. “This is no substitute for caring for a patient, but now instead of saying there is a red rash, you can say this is what it looks like,” he told the website. “Now everybody has that capability in their pocket all day long.” 

While there’s no doubt that social media is improving patient-doctor relationships — for example, during the 2013 Boston Marathon bombings, emergency responders were able to act faster after checking Twitter for real-time updates — social media-savvy doctors can also pose privacy risks. In May, an Ohio woman being treated for Syphilis sued the University of Cincinnati for posting the results of her tests, along with her name, on Facebook. And in December, an intoxicated Chicago woman treated in the ER at Northwestern Memorial Hospital sued her doctor after he allegedly posted photos of her on Facebook and Instagram along with the hashtags “Cuvee #bottle #service #gone #bad.” There are also laws preventing doctors from practicing medicine from across state lines, so if a Twitter user in Indiana tweets a doctor in Los Angeles, the MD may not actually be allowed to give him the answer he’s looking for. And national HIPAA laws are put in place to protect the privacy of patient’s identifiable health information online.

But there’s one more inevitable drawback of the medical community’s foray into social media. “It’s difficult to have my own private life,” says Pho. “I keep my personal social media accounts very private. At the end of the day, even off the clock, I’m still a doctor.”

 


Via Plus91
more...
No comment yet.