Describes what people have believed about the moon and what has been learned over time and presents an overview of the Apollo space program.

Examines the sun in the context of other, more distant stars anddiscusses the night sky and movement of the earth.

Provides information about oysters, clams, scallops, and mussels--sea animals that live in shells.

A simple description of the characteristics of winter.

A simple explanation of the moon and why it changes shape throughout the month.

Describes the climate as well as plant, animal, and human life in the nearly treeless area spread across northern parts of Canada, Alaska, Europe, and Asia.

Gives a simple explanation of the four main directions and tells how to use the sun to determine direction.