An‿octopus has three hearts‿and blue blood.It can change the color‿of its skin in less than‿a second.Some‿octopuses can‿open jars to get the food inside.Each‿arm can feel‿and taste the things‿it touches.That's why an‿octopus can search for food in many places at once.Scientists‿are still trying to find‿out how smart it really is.
When‿a honeybee finds flowers, it flies back to the hive.Then‿it does a special dance called the “waggle dance.”The direction‿of the dance shows where the flowers‿are.The longer the bee dances, the farther‿away the flowers‿are.Other bees watch carefully and then fly off to find the food.
6 句．約 75 字．單字：rest 休息、sort out 整理、memory 記憶、teenager 青少年、actually 其實
Sleep‿is not just‿a time to rest.While we sleep, our brain sorts‿out what we learned during the day.It keeps the important memories‿and lets the others go.Scientists think the brain‿also cleans‿itself while we sleep.Teenagers need‿about eight to ten hours‿of sleep every night.So‿if you stay up late to study, you might‿actually remember less!
Sunlight looks white, but‿it‿is really made‿of many colors.When sunlight enters the air, it hits tiny bits‿of gas.Blue light bounces‿around much more than red light does.So blue light spreads‿across the whole sky, and that's what we see.At sunset, the light travels through more‿air, so the sky turns red‿and orange.