人们是怎么知道地球是圆的的？你也许会说是哥伦布航海发现的，但其实远在古希腊时期就有了地球是圆的的理论。 从船上的?t望台能看到在甲板上看不到的远方，月相变化，时差的产生，不同地方的人能看到不同的星空等等，这些都表明地球是圆的。 这本英语原版科普绘本提供了丰富有趣的知识，穿越历史，进入太空，启发孩子观察、思考有关地球形状的现象与知识，培养孩子独立思考的精神。 书后有简单的小实验，引导孩子自己动手、观察。

Jack and Annie continue their quest for the secrets of happiness in order to save Merlin. This time, the Magic Tree House takes them to the one continent they haven't visited before: Antarctica. Illustrations.

Branley explains these powerful storms in simple terms youngchildren can understand. He describes the funnel cloud and how itforms and [tells] what to do during a tornado. The book ends on acomfortable note, that the idea is not to panic but to know what todo to ensure safety.

The monarch butterfly, one of the most seemingly delicate ofall of nature’s animals, proves to be one of the toughest in thisreader. Making the yearly trip from the Northern United States andCanada to the Oyamel forest of Mexico is no easy task, and it takesfive generations of butterflies in order to do so. Battling coldtemperatures and the threat of starvation, these beautiful insectscomplete an almost 3,000 mile journey over the course of twomonths, only to have to turn and around and head back home.

A new Ology odyssey has begun. Written by Lady Hestia Evans in 1825, 'Mythology' is the record of her travels through Greece, discovering the wonders of ancient Greek myths, the world of mighty gods and fearless heroes who battle the merciless beasts of legend.

Readand find out about one of nature's most mysterious forces--theearthquake. Some earthquakes are so small that you don't even feelthem, while others can make even big buildings shake Learn whyearthquakes happen, where they are most likely to occur, and whatto do if one happens near you.

Maddie's room is a mess. Maddie's toys are everywhere. AndMaddie has to clean them up before her birthday party starts. Thislooks like a job for ... MIGHTY MADDIE Faster than a speedingbullet, more powerful than a vacuum cleaner, Mighty Maddie, theroom-cleaning superhero, gives readers a playful lesson about thedifference between light and heavy.

They’re SSSSLITHERY! SLIPPERY! They creep us out! But get toknow them and you’ll find snakes private, quiet types who just wanta cool, shady place to call home. From the tip of their forkedtongues, to skin that sheds, to the rattles on certain tails, thesecreatures have secrets all kids will love. Cool photos and funfacts slip us inside their surprising world.

Does a polka-dotted sock match a striped sock? Young childrenwill learn about matching, an important early math skill, as alonely striped sock searches the house for its mate. They will mayeven be inspired to practice this skill in their own sockdrawers!

The class finds Ms. Frizzle inside her closet－playing pinball!But this is no ordinary pinball machine－it's played with light pulses, not steel balls. The Friz has to light up the six colors of the rainbow to win the game, and the kids want to help her. So they take the Magic School Bus inside the pinball machine.Buckle up for this enlightening adventure and learn the secrets of color.