Articles for Grade 7

Schools across the world are trying to come up with innovative solutions to keep students active and alert. Some are replacing conventional classroom chairs with exercise balls or standing desks. At Ward Elementary School in Winston, North Carolina students have adopted an innovative program that entails riding stationary bikes while reading....

On Wednesday, April 20, Treasury Secretary Jacob J. Lew announced that Harriet Tubman will replace Andrew Jackson, the seventh President of the United States, on the $20 bill. The former slave and abolitionist is the first African-American, and the first woman in over a century, to be featured on the face of U.S. currency. The last female represented on U.S. notes was Martha Washington, who appeared on the $1 silver certificate from 1886 to 1957, when the certificates were discontinued....

Tossing a plastic spoon or fork into the trash after using it once is not just acceptable; it is fashionable. Experts estimate that over 40 billion pieces of plastic cutlery end up in the garbage each year - And that's just in the US. The numbers are even worse in India where an astounding 120 billion pieces clog the landfills annually. But that may change soon thanks to Indian entrepreneur Narayana Peesapaty, whose start-up Bakey's transforms mundane cutlery into delicious treats!...

Every year more than 2 million people, a quarter of them children, end up in hospital emergency rooms with concussions — And those are the lucky ones! That's because there are millions more that postpone treatment or even worse, never get themselves examined simply because they don't experience the classic concussion symptoms that include vomiting, blurred vision, and loss of balance....

The fact that computers are getting increasingly smarter is evident. However, they still lack creativity and intuition and hence cannot learn, think and understand like humans — At least, that was the consensus until Google's AlphaGo computer algorithm beat 18-time world champion Lee Se-dol, 4 to 1 at the ancient Chinese game, Go....

For those that enjoy pranks, there is no better day than April 1. Also known as 'Fool's Day' it is the one day of the year when light-hearted tricks are not just accepted but welcomed! Nobody knows how this fun tradition started. Some think it began in 1582 when the world moved away from the Julian calendar, (that began the new year in April) to the current Gregorian calendar. Others think it was to celebrate the onset of spring....

Just when we think there couldn't possibly be any more mysteries left to solve about the human anatomy, comes another discovery. This one has to do with sighing. It turns out that the involuntary reflex that is generally associated with sadness or despair is crucial to our well-being. That is why researchers at the University of California, Los Angeles and Stanford University were determined to find out what triggers this spontaneous action, without which our lungs would collapse!...

This past week was an exciting one for astronomy fans. That's because two comets — 252P and the P/2016 BA14 — were scheduled to make their closest approach to Earth, back-to-back. The icy celestial bodies did not disappoint....

Easter weekend is upon us! For most of you, that means going to an egg roll or two, meeting the Easter bunny, participating in parades and best of all binging on delicious foods like honey-baked ham and potatoes with friends and family. It turns out that not all countries celebrate this important Christian holiday with these traditions. They have their own rituals which may not include egg hunts and Easter bunnies, but are equally fun!...