Learn how apoptosis is different from cell death by injury. Learn the role of this process in development and body maintenance. [10:48]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

Grades 9-12. Describes the logic behind the development of Newton's law of universal gravitation. Beginning with Johannes Kepler and his three laws of planetary motion, content walks the reader through Newton's thought process and development of this theory. Detailed diagrams and animation of planetary motion are also provided.

This is one page from a site on Welks. It tells about how many of the eggs will survive, the growth rate, how old a whelk can live to be, and it talks about poorly distrubited genes.

This video describes how global climate change is affecting Barrow, Alaska. The Inupiaq people who reside in the region discuss how the climate change is affecting their lives as well. Uses popups.

Join Jacob on the Nova Zembla Expedition, and help him use suitable materials for building his house.

Visit Vlad and learn about the properties of conductors and insulators, and what materials are used for them.

Article on lignite that includes general information as well as a history of lignite mining and a summary of the geology of lignite deposits. The second section presents more detailed information about lignite geology in Arkansas.

A comprehensive index of aromatic and medicinal plants with several bibliographical sources for each plant.

Arrhenius definition of acids and bases. [7:50]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

In this lesson, students will learn about rondo form and practice a chant. After learning about the structure of the chant, they will work in small groups to create a chant about a habitat. The chants will then be combined with the model chant to create a rondo form.

In this arts integrated unit, students will explore Rocks and Soil. These projects focus on bringing multiple art forms to the Earth Sciences for third graders. Students will focus on comparing and contrasting the 3 types of rocks, as well as their attributes. They will create and perform a riddle in which the class will try to guess which rock the riddle represents. The students will analyze the rock cycle by composing small group dance compositions. Students will take a Gallery Walk viewing photographs of different types of soil in its natural setting and illustrate their own version of soil in its natural setting.

In this lesson, students work in groups with each acting as a predator, prey, or family member in a particular habitat. They present their habitat performance to the class and students identify the habitat and animal relationships. Then, they complete a writing activity where they will learn about phonics by crafting animal sounds into onomatopoeic words and the class will create a digital ABC book of animal drawings and recorded animal sounds.

In this lesson, students will move and generate choreography to understand different states of matter.

In this lesson, students use tableaux to dramatize their roles in the food chain of an ecosystem. Next, they write in role arguing why they are important to the ecosystem. This is followed by a debate in the format of a Character Panel about which plant or animal is most important to the ecosystem, with other students acting as interviewers. This results in a class discussion about the interdependence of organisms in an ecosystem.

This video segment explores the benefits and pitfalls of cloning as a means of reproduction. From Evolution: "Why Sex?" [3:17] Accompanied by a short background essay.

Cool Cosmos identifies kid's frequently asked questions about the tools we use in space. Click on the links to find the answer to questions about space stations, telescopes, spectrometers and more!

Resource provides easy to understand information about comets. Click on the frequently asked question link to find out more about these mysterious celestial bodies.

Resource compiles a list of most frequently asked questions about Mercury. Each question is linked to an astronomer's answer. Kids can explore many aspects of this wonderful planet.

Resource provides a deeper look at the planet Neptune. Just click on the frequently asked question link and dive into knowledge.

Visit this site and learn more about Pluto. Provides the answers to kids' most frequently asked questions.