Long ago, the Tripods--huge, three-legged machines--descended upon Earth and took control. Now people unquestioningly accept the Tripods' power. They have no control over their thoughts or their lives. But for a brief time in each person's life--in childhood--he is not a slave. For Will, his time of freedom is about to end--unless he can escape to the White Mountains, where the possibility of f…
Volcano Explorers teaches readers all about volcanoes, and the scientists who go to extremes to study them!
What sounds cannot be heard? How do bats find their way in the dark? What animal makes the loudest sound of any on Earth? Take a closer look at the science we use every day! From the moment we get up in the morning and all through the day and night, find out about the science in your life.
When can you hear the Doppler effect? -Which animal makes the loudest sound? -How can curtains stop an echo? Do It Yourself offers an exciting new approach to understanding and investigation. Each book helps you conduct your own experiments and activities to learn more about the world around you.