This video segment adapted from FRONTLINE looks at nuclear fission as an energy source that can be used to generate electricity.

Students conduct an experiment to determine how varying the composition of a construction material affects its strength. They make several adobe bricks with differing percentages of sand, soil, fibrous material and water. They test the bricks for strength by dropping them onto a concrete surface from progressively greater heights. Students graph the experiment results and use what they learn to design their own special mix that maximizes the bricks' strength. During the course of the experiment, students learn about variables (independent, dependent, control) and the steps of the engineering design process.

This is a lab experiment where students make detailed observations of a candle use them to infer the products of combustion of a candle.

This activity is used to introduce or reinforce in students the importance of differentiating between observations and interpretations and quantitative and qualitative observations during classroom experimentation or demonstrations

This video segment produced for Teachers' Domain features a time-lapse video of clouds forming, changing, and moving across the sky.

This brief video segment produced for Teachers' Domain features time-lapse video of a sunrise and a sunset.

Students will use science skills of observing, describing and measuring in the context of Making Ice Cream. Students will understand the concept that physical properties can change.

This video segment adapted from Shedding Light on Science illustrates how light changes speed, and thus direction, in a process known as refraction.

Home on the web of the Nobel Prize and the foundation that sponsors the awards, given annually, for outstanding contributions in physics, chemistry, medicine, literature, and peace. The site features current winners each year. You will also find biographies and other information on every Nobel Prize Laureate in every category since the Prize was initiated in 1901. In the Education section, there are over 40 productions, including many interactive games which help to develop an understanding of the developments for which Nobel Laureates have won their prizes.

Data modeling activity using oil reserve and consumption data. Students predict when oil reserves meet or exceed reserves.

This video segment adapted from NOVA follows the clean-up effort after the 1989 Exxon Valdez oil spill off the coast of Alaska. Also featured is a marsh where an oil spill occurred 20 years earlier; analysis suggests that environmental damage may last for decades.

This is an art project where oil paints and water is used. Students will have already explored the densities of oil and water.

This activity is designed to help deepen our language and understanding of taking observations. We will also learn that water molecules are in constant motion.

Students will investigate what constitutes a solid and a liquid state of matter. Using the probe, students' misconceptions on states of matter will be exposed. The lab, which uses a cornstarch, water and food coloring mixture, will be explored. The students will determine how that exploration will take place and devise a procedure to determine the state of matter. Students will then, as a group, present their findings to the class. After all the groups have presented their findings, the groups with the same findings will combine and defend their findings to the other group(s) until the class, as a whole, has reached a consensus.

This 12-minute video lesson discusses acetic acid to acetyl chloride mechanism. They can be generalized to forming any acid halide from a carboxylic acid. [Organic Chemistry playlist: Lesson 69 of 73].

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.

This 13-minute video lesson considers the addition of Water (Acid-Catalyzed) Mechanism. [Organic Chemistry playlist: Lesson 29 of 73].

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.

This 9-minute video lesson looks at the properties of alcohol. [Organic Chemistry playlist: Lesson 46 of 73].

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.

This 7-minute video lesson looks at naming alcohols. [Organic Chemistry playlist: Lesson 45 of 73].

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.

This 8-minute video lesson provides an introduction to aldehyde. [Organic Chemistry playlist: Lesson 61 of 73].

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.

This 12-minute video lesson looks at Aldol Reaction. It is the final video in the Organic Chemistry playlist. [Organic Chemistry playlist: Lesson 73 of 73].

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.