Physical and biological factors affect everyday living. Scholars explore electromagnetic forces, motion, the rock cycle, and geological changes. They examine cells as the building blocks of life and how organisms reproduce using images...

There are many interactions among living things and their surroundings. By completing a reading, scholars learn about the Earth, the moon, and the sun and how they relate to the solar system. They also investigate the basics of physical...

Discover the life cycle of seedless vascular plants.

Learn about the reproduction and life cycles of plants.

Understand the life cycle of a eukaryotic cell.

Read about the life cycle of dandelions from their first appearance in the spring. Includes audio narration in 16 additional languages with text in English.

Explore different types of cycles in animal behavior.

Explore the reproduction of fungi.

Explore the light reaction process of photosynthesis.

Learn that the nitrogen cycle illustrates how nutrients cycle through a terrestrial ecosystem with the chapter in this free textbook. Explains how nitrogen plays an important role for life. See a diagram of the nitrogen cycle that shows...

This lesson provides real life applications for divisibility and prime numbers including the Cicada Cycle's use of prime numbers and Cryptography,encryption.

Explore the specific reactions that happen during the cellular respiration process.

This site lists the different antibiotics, tells how they disrupt the life cycle of the bacteria, and give examples of where in nature the antibiotic is from- i.e., penicillin -> bread mold.

Very detailed outline describing several aspects of plant diversity, including vascular vs. nonvascular, evolutionary adaptations, homosporous and heterosporous life cycles, and specific information on some ancient species (Lycophytes,...

This textbook chapter looks at the role of temperature in sustaining life on Earth and on weather and climate. It discusses the Earth's movements and the seasons, the circulation of the oceans, wind and weather, and the water cycle....

A lesson on the classification of mosses and liverworts as well as the physical make up and similarities of the species.

Learn some facts about the African penguin in this book. Includes audio narration in English and Spanish with text in English.

A digital version of a butterfly life cycle picture book for young readers.

Resource provides a holistic and complete meiosis lesson with illustrations, animations, glossary, and links. Extremely detailed and helpful site.

Learn about ocean systems and habitats. Lots of reading, writing, games, and interactive activities. Colorful and fun.

Learn about viruses of humans and other animals, the Baltimore classification system, and the HIV life cycle.