Why Is It So Loud? Level 5
A series of twenty non-fiction science readers which engages children in the world around them.
Why do I hear thunder after I've seen lightning?
What is sound?
How do our ears hear sound?
You can find the answers to these and other questions about sound in Why Is It So Loud?
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Guess What! American English Level 2
Workbook with Online Resources
Engaging facts, amazing photography and captivating real-life video take young learners on a journey to explore the world as they learn English.Author: Susan RiversEnglish Type: American EnglishCEF Level: A1Publication date: August 2015
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