What kinds of everyday objects use levers? What do pulleys do? Questions such as these are answered in this age-appropriate text about the ...
Several different modes of transportation, such as trains, planes, and cars, need motors and gears to properly run. Motors and gears also ...
What are switches used for on specific machines? Why are circuits needed to power certain devices? Questions such as these are answered as ...
When a bell rings or a buzzer goes off, it often serves as a reminder to complete a certain task or directs our attention to something that ...
Readers take an exciting journey to the Indus Valley as they explore the ancient civilization that arose in this fascinating place. Through ...
Where was Mesopotamia located? What did ancient Mesopotamian society look like? What did the people who lived there do for fun? As readers ...
Readers are introduced to what life was like for the Incas as they explore this ancient civilization. Through detailed text that closely ...
How were the daily lives of the ancient Maya different from our daily lives today? What problems did they face as an early civilization in ...
The destruction caused by tsunamis and floods not only affects Earth's geography, but also the people, plants, and animals present in the ...
