Cycles in nature

Simple text and photographs introduce the life cycle of a monarch butterfly.

Simple text and photographs introduce the life cycle of a monarch butterfly.

Learn what the sun's rays are doing to different parts of Earth at different times as well as the importance of the Earth's axis, or tilt.

Learn how volcanoes and lava make igneous rocks, how heating and cooling caused by energy in the Earth's core creates metamorphic rocks, and how water and other elements break down rocks to create sedimentary rocks.

Learn about the eight phases of the moon and why, even though the sun always lights the moon, we can't always see it.

Introduces the cycle of seasons on Earth.

Introduces young readers to the water cycle.