Little Kids First Big Book of Why Hardcover – Picture Book, 1 June 2011
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Hardcover, Picture Book
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- Hardcover : 128 pages
- ISBN-10 : 1426307934
- ISBN-13 : 978-1426307935
- Dimensions : 25.78 x 1.65 x 25.65 cm
- Publisher : National Geographic - US; Illustrated edition (1 June 2011)
- Reading level : 4 - 7 years
- Language: : English
- Best Sellers Rank: 2,422 in Books (See Top 100 in Books)
- Customer Reviews:
“My son loves these books. We started reading National Geographic Kids books when he was about six (he's nine now) and I can honestly say that these books have been instrumental in teaching him to read.” – Consumer
“My kids love these books. Super fun and interesting.” – Consumer
About the Author
The National Geographic Kid is curious about the world around them, empowered in the face of challenges and responsible for others and the natural world. Combining these principles with the international educational heritage of Collins, this partnership is a natural fit for books that are funny, weird, exploratory, educational and loved by children.
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Wrong. And in fact this trips up most elementary science students and they got it wrong here. Helium balloons don't float because they are "lighter" they float because they are less dense. Less dense objects float on more dense objects. For instance, a tanker ship is made of metals that are on their own denser and heavier than water. But as a boat they float? Why? Because as an entire object it's less dense than water (hint: Ships are largely filled with ballast like air.
Similarly, planes fly IN AIR because the air under the wing is higher pressure (denser) than the air above the wing. Is air lighter than air?
On the same page they talk about how hot air is "lighter than cold air" which it isn't. Hot air is simply less dense than cold air.
I purchased it because I'm currently having to homeschool my 3yo during lockdown who was going to a private daycare 3 days a week.
This book covers just enough of a subject to get a preschooler engaged, with big informative pictures. It's also really bright and bold making it even more appealing.