[Free Registration/Login may be required to access all resource tools.] The process of cell division in eukaryotic cells is carefully controlled. The cell cycle is the life cycle of a cell, with cell division at the end of the cycle....

Discover the life of brine shrimp with this interactive resource.

Are you a budding Lance Armstrong or Greg LeMond? Are you into cycling and speed? Then this is the science fair project for you. In this science fair project, you will determine the best gear ratio for your bike, to get the highest speed...

[Free Registration/Login may be required to access all resource tools.] Water and elements like carbon and nitrogen are constantly being recycled through the environment. This process is called a biogeochemical cycle because it involves...

[Free Registration/Login may be required to access all resource tools.] Carbon is one of the most common elements found in living organisms. Chains of carbon molecules form the backbones of many molecules, such as carbohydrates,...

[Free Registration/Login may be required to access all resource tools.] The menstrual cycle is a series of changes in the reproductive system of mature females that repeats every month. Learn more about the menstrual cycle in this...

[Free Registration/Login may be required to access all resource tools.] Like water and carbon, nitrogen is also repeatedly recycled through the biosphere. This process is called the nitrogen cycle. Learn more about the nitrogen cycle in...

Is your room a mess? Does your nose have freckles on it like your mom's? Are your eyes the same color as your dad's? Which one of these things does not belong in lessons about heredity? Give these investigations a whirl while learning...

Very informative site from The Exploratorium about the science of bicycling. You can learn about the development of the wheel, how gears work on a bike, even how brakes were developed. Perfect site for research on bikes.

Through interactive activities, reading exercises, and lab activities, students study how science, matter, energy, and systems are interrelated.

This tutorial explains the rock cycle--from beginning to end! It is full of activities, assessments, games, slideshows and all kinds of interactive material. Learn what rocks are made of and how they change from one form to another....

In this lesson, students unite science and physical activity to learn about the water cycle!

Science and exercise unite in this lesson! Students learn about the life cycle of a butterfly while performing certain physical tasks at each stage.

Learn about the three stages of the Calvin Cycle reactions: carbon fixation, reduction, and regeneration of the starting molecule. See how the products of the light reactions, ATP and NADPH, are used to fix carbon into sugars in this cycle.

In this interactive tutorial you'll learn about rocks and the rock cycle. You'll be introduced to the three different rock types and what makes them what they are. You'll also learn about how the matter that makes up these rocks is...

Learn how cells use checkpoints to regulate the cell cycle. This article provides an overview of cell cycle control, outlining the factors that influence a cell's decision to pause or progress at each checkpoint.

In this short science project you will learn how to build a capacitor using common household items. By testing different charge cycles, you will work to discover how much charge is stored in a Leyden jar capacitor.

In this interactive tutorial students will learn what causes the seasons, diurnal cycles and how the constellations move through the sky. Learn we are able to see other planets and how astronomical events affected life on the Earth.

Learn about the four phases of the water cycle, the ways in which watersheds are crucial to healthy water, and the best ways to manage local watersheds with this interactive lesson.

A detailed overview of global climate change, with explanations of Earth's climate change, the carbon cycle, ecosystems, and greenhouse gases, and how the movements of matter and energy impact on climate. All information is reinforced...

Olaf the viking is learning about the life cycle of plants. Help him tend to his garden as he learns.

Students explore Earth's most important natural resource, water, and learn about how the planet's aquatic biomes thrive and support life.

In this interactive tutorial you will learn how pressure creates stress and strain on rocks. Learn how different types of strain are produced by different plate tectonic settings, and explore the different types of mountain ranges and...

In this interactive tutorial students will explore what it is like on the Moon. Learn why the shape of the Moon seem to change and also about lunar eclipses. Discover why the tide changes twice a day and explore how the cycle of the Moon...