Zoehfeld, Kathleen Weidner

Introduces several different dinosaurs, looks at how they varied in size and weight, and explains how scientists have learned about the prehistoric creatures.

Photographs and text trace the process by which a tadpole develops into a frog.

Describes the parenting habits of the Maiasaura, a dinosaur whose way of raising children bore similarities to that of birds.

Learn all about penguins in this book full of facts and photographs.

Tells how footprints made by the dinosaurs have been preserved, looks at the tracks made by different dinosaurs, and explains what these impressions tell scientists about the animals that made them.

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

Follows a newborn bottlenose dolphin throughout his first day in the ocean, during which he learns about other dolphins, echolocation, and the protective actions of his mother.

Explains how mountains are formed through plate tectonics and worn down by millions of years of rain, wind, and ice.