Holly Keller has created vivacious new paintings for this favorite Let's-Read-and-Find-Out Science title about geology. Readers follow two enthusiastic rock hounds around the globe as they add to their collection. Along the way they will learn how sedimentary, metamorphic, and igneous rocks are formed. From the Egyptian pyramids to Roman roads, from the diamond ring on your finger to the pebbles under your feet'rocks are everywhere! This nonfiction...

Explains the phases of the moon--the changes that seem to happen to it as it goes around Earth.

Describes the origin and nature of tornadoes and how to stay safe when threatened by one of these dangerous storms.

Explains how fossils are formed and what they tell us about the past.

Explains why oil spills occur and how they are cleaned up and suggests strategies for preventing them in the future.

Explains how leaves change their colors in autumn and then separate from the tree as the tree prepares for winter.

Provides basic facts about the behavior of bats and describes how they benefit the environment.

Describes how magnets work and includes instructions for making a magnet and a compass.

Discusses the properties of light, particularly its source in heat.

In simple text, presents the three states of matter, solid, liquid, and gas, and describes their attributes.