Let's-read-and-find-out science. Stage 2

Explains the basic properties of skin, how it protects the body, and how it can vary in color.

Explains how bacteria and viruses affect the human body and how the body fights them.

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

Describes how dolphins communicate with each other in squeaks, whistles, and pops.

Explains the basic characteristics of weather--temperature, humidity, wind speed and direction, air pressure--and how meteorologists gather data for their forecasts.

Describes the physical characteristics that make it possible for polar bears to live in the cold Arctic, discusses how global warming is affecting their environment, and suggests ways in which readers can help protect the Arctic regions.

An introduction to the human skeletal system, explaining how the 206 bones of the skeleton join together, how they grow, how they help make blood, what happens when they break, and how they mend.

Discusses why earthquakes happen, what their sometimes devastating effects can be, where the danger zones are, and what measures people can take to safeguard themselves.

Explains how the various orders and suborders of dinosaurs were similar and different in structure and appearance.

A simple explanation of how the rotation of the earth causes night and day.