Describes what apples look like, how they grow, and what we use them for.

Describes different kinds of mountains, some of the animals that live on them, and how people use mountains in various ways.

Describes what rain is and how it helps plants, animals, and people.

Describes snow's appearance and composition, and what kids can do in the snow.

Examines different fruits and how they are grown, picked, and packaged.

Describes a few different vegetables, how they grow, and why they are nutritious.

We currently rely on nonrenewable sources, such as oil, for most of our fuel. Scientists are working on new fuels from crops and other materials to help ease future dependence on nonrenewable resources.