Good question!

Author
Carson, Mary Kay Sandler, Martin W Stewart, Melissa Richmond, Benjamin Smith, Kelly
 
1)  Did it all start with a snowball fight?: and other questions about the American Revolution
Publisher
Sterling Pub. Co., Inc
Pub. Date
[2012]
Language
English
Description
3)  Why did the whole world go to war?: and other questions about World War II
4)  How does a caterpillar become a butterfly?: and other questions about... butterflies
5)  How does a seed sprout?: and other questions about-- plants
6)  How does the ear hear?: and other questions about... the five senses
7)  How is my brain like a supercomputer?: and other questions about the human body
Publisher
Sterling Children's Books
Pub. Date
[2014]
Language
English
9)  How strong is an ant?: and other questions about bugs and insects
10)  What makes a tornado twist?: and other questions about weather
11)  What was America's deadliest war?: and other questions about... the Civil War
Publisher
Sterling Children's Books
Pub. Date
[2014]
Language
English
Description
13)  Who were the American pioneers?: and other questions about . . . Westward expansion
14)  Why did T. rex have short arms?: and other questions about--dinosaurs
15)  Why does Earth spin?: and other questions about... our planet
16)  Why is the sea salty?: and other questions about--oceans
17)  What are the three branches of the government?: and other questions about the U.S. Constitution
18)  Why couldn't Susan B. Anthony vote: and other questions about women's suffrage
19)  How hot is lava?: and other questions about volcanoes
Author
Publisher
Sterling Children's Books
Pub. Date
[2015]
Language
English
Description