Germs are all around us, but they're too small to see. Many germs are harmless, but two kinds, viruses and bacteria, can make you sick! How? Read and find out! This classic Level 2 Let's-Read-and-Find-Out picture book is all about germs, how they can make you sick, and how your body works to fight them off. Now rebranded with a new cover look, this book features rich vocabulary and simple diagrams to explain why you feel poorly when you're sick and...

"Featuring incredible photos and new information about the latest research into Mars, this updated edition of DISCOVERING MARS covers everything about the great red planet, from past to present"--Publisher.

Explains how electricity is produced and transmitted, how to create electricity using an electrical wire and a magnet, how generators supply electricity for cities, and how electricity works in homes.

Provides miscellaneous facts about over one hundred baby animals and their parents, including chameleons, sloths, and elephants.

Provides answers to such questions about the weather as "What makes the weather?", "Does air have weight?", "How big are hailstones?", and "What is El Niño?"

A simple explanation of what bears look like, how they hunt, what they eat, how they sleep during the winter, and how their cubs are born and raised.

Uses a question and answer format to provide information about the physical characteristics, habits, and behavior of sharks.

Questions and answers explore such topics as what the dinosaurs were, what they ate, what color they were, and how we know about them.