Describes the seven characteristics that define life - cells, homeostasis, heredity, use of energy, reproduction, response to environmental stimuli, and evolution and adaptation.

This lesson introduces the process of active transport, explaining that it is a form of transport that requires energy, and moves molecules against their concentration gradient. It is 4 of 4 in the series titled "Active Transport."

This lesson introduces the process of active transport, explaining that it is a form of transport that requires energy, and moves molecules against their concentration gradient. It is 1 of 4 in the series titled "Active Transport."

Review concepts covered in high school biology dealing with cellular respiration. Page includes vocabulary as well as charts to explain the process.

Learners examine the biology topic of cell energy. The tutorial consists of definitions, pictures, and the basic sequence of photosynthesis.

Through these lesson plans, investigate the different types of fat found in food and found in the human body. Discuss the functions and problems associated with dietary fat and make wise food choices based on what you learn about fat,...

Read about Hans Krebs' childhood and how it influenced his interest in science. Read about the importance of mentors in his life as he did research in chemistry.

[Free Registration/Login may be required to access all resource tools.] Energy is the ability to do work. In organisms, this can be physical work, like walking or jumping, or it can be the work used to carry out the chemical processes in...

[Free Registration/Login may be required to access all resource tools.] How does the food you eat provide energy? Through the process of cellular respiration, the energy in food is changed into energy that can be used by the body's...

Students form expert engineering teams working for the (fictional) alternative energy consulting firm, Greenewables, Inc. Each team specializes in a form of renewable energy used to generate electrical power: passive solar, solar...

This lesson focuses on what happens during cellular respiration including how energy is released as APT and why organisms need energy in that form. A link to a test is provided.

Described is a simple low cost home-made device that converts the radio wave energy from a mobile phone signal into electricity to light an LED. No battery or complex circuitry is required. The device can form the basis of a range of...

This lesson will introduce the process of fermentation and explain how it allows cells to produce energy in the absence of oxygen. It is 2 of 2 in the series titled "Fermentation."

A brief informational summary which describes the structure and function of mitochondria inside cells.

[Free Registration/Login may be required to access all resource tools.] Sometimes cells need to obtain energy from sugar, but there is no oxygen present to complete cellular respiration. In this situation, cellular respiration can be...

In this experiment, students observe what happens when a pan of soapy, colored water is heated. They will see that convection currents cause the fluid to rise and sink in a localized convection cell.

[Free Registration/Login may be required to access all resource tools.] Looks at how atmospheric circulation cells affect the climate of regions.

[Free Registration/Login Required] Explore how batteries use redox reactions to create electrical energy to power a flashlight.

In this lesson students will observe the growth of yeast cells, which is evidence that yeasts are converting food to energy and are living organisms.

Discusses electric forces, electric fields, electric potential, and the role that electric potential plays in enabling materials to pass through a cell membrane.

NADH and NADPH are enzymes involved in cellular processes. Explains how NADH participates in catabolic reactions where energy is released and NADPH is involved in anabolic reactions where energy is consumed. Their functions and chemical...

[Free Registration/Login may be required to access all resource tools.] Definition of cellular respiration and its overall chemical equation. The energy changes that occur during cellular respiration, including in photosynthesis.

[Free Registration/Login may be required to access all resource tools.] Why do you need air to live? Of course if you didn't breathe, you couldn't survive. You need the gas oxygen to perform cellular respiration to get energy from your...

[Free Registration/Login may be required to access all resource tools.] Describes how regional differences in solar radiation create global wind belts.