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A Spider's Taste for Blood
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Why Cats Nap and Whales Snooze
GSAT Mathematics Quiz, Teaching Math, teaching anxiety
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The Taste of Bubbles
A Diamond Polish for Ancient Tools
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Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Earth
Earth's Lowly Rumble
Slip Slidin' Away—Under the Sea
A Global Warming Flap
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Power of the Wind
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A Big Discovery about Little People
A Volcano's Deadly Ash
Fish
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The Essence of Celery
How Super Are Superfruits?
Symbols from the Stone Age
GSAT English Rules
Finding Subjects and Verbs
Who vs. Whom
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E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
10 Common Mistakes When Preparing for the GSAT Math Test
GSAT Exams Jamaica Scholarships
Access denied - Disabled boy aces GSAT
2014 GSAT Results for Jamaican Kids
GSAT stars reap scholarship glory
GSAT Mathematics
Setting a Prime Number Record
Deep-space dancers
How a Venus Flytrap Snaps Shut
Human Body
Tapeworms and Drug Delivery
Don't Eat That Sandwich!
A Sour Taste in Your Mouth
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Horseshoe Crabs
Giant Squid
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Shih Tzus
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The Surprising Meaning and Benefits of Nursery Rhymes
What Not to Say to Emerging Readers
How children learn
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The Pressure of Scuba Diving
Extra Strings for New Sounds
Hold on to your stars, ladies and gentlemen
Plants
Nature's Alphabet
A Giant Flower's New Family
Getting the dirt on carbon
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Boa Constrictors
Alligators
Space and Astronomy
Slip-sliding away
Supernovas Shed Light on Dark Energy
A Star's Belt of Dust and Rocks
Technology and Engineering
Roll-Up Computer Monitors to Go
Space Umbrellas to Shield Earth
Crime Lab
The Parts of Speech
What is a Verb?
Pronouns
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Transportation
Are Propellers Fin-ished?
Middle school science adventures
Robots on the Road, Again
Weather
The Best Defense Is a Good Snow Fence
A Change in Climate
Catching Some Rays
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Sun Flips Out to Flip-Flop

The sun is a strange and turbulent place. The scorching hot ball of gas may look smooth from a safe distance, but dark spots, violent explosions, and massive eruptions constantly come and go on its surface. Scientists have noticed that the sun gets especially stormy every 11 years or so—a period known as the solar cycle. At about the same time, our star's magnetic poles suddenly flip: North becomes south. South becomes north. Researchers at NASA's Goddard Space Flight Center in Greenbelt, Md., now think they're getting closer to understanding what causes the sudden switch in direction. Huge clouds of electrically charged particles called coronal mass ejections (CMEs) might have something to do with it, they say. Spit out by the sun from time to time, such clouds can weigh billions of tons. The researchers collected data from two, 11-year sun cycles. For both cycles, the researchers saw an increase in CMEs at the poles of the sun just before the magnetic switch happened. They think the clouds are blasted off the sun, carrying away old magnetic fields and preparing it for the switch. Why does it happen every 11 years or so? That's a question that no one has an answer for yet. Perhaps it's just long enough for the sun to be ready for something different!—E. Sohn

Sun Flips Out to Flip-Flop
Sun Flips Out to Flip-Flop








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