検索キーワード： 著者 "Robin Nelson" すべてのカテゴリー

Kids will find out how wrenches tighten bolts in many types of situations. A back matter spread explains how a wrench is another type of lever.

Curious listeners will discover how screwdrivers tighten screws using different kinds of tips. Additional text explains how screws are simple machines used to fasten objects together.

Introducing a common tool. Learners will understand how saws have sharp teeth that cut through wood.

Introducing a common tool. Students will see how levels indicate whether objects are flat or straight.

Young listeners will explore how hammers pound in and pull out nails. Additional text explains how hammers are one kind of simple machine: a lever.

What does it mean to migrate? Discover which animals migrate and why they migrate.

Hibernation is a cycle that some animals go through every year. Most people know that bears hibernate. But why do they hibernate? And what other animals hibernate?

Winter, spring, summer, and fall - the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

From lakes, to clouds, to rain that falls back to Earth - discover how water changes through various processes to form the water cycle.

Winter, spring, summer, and fall - the seasons are one of nature's most familiar cycles. But why does the weather change? Learn why weather patterns change over the seasons.

Every month a cycle happens in the sky. Listen and learn about the patterns of the moon and how it changes throughout each month.

What does it mean to migrate? Discover which animals migrate and why they migrate through detailed, simple text.

Hibernation is a cycle that some animals go through every year. Most people know that bears hibernate. But why do they hibernate? And what other animals hibernate?

From lakes, to clouds, to rain that falls back to Earth - discover how water changes through various processes to form the water cycle.

Young listeners will learn about the basic patterns of the sun and earth and what causes day and night.