[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....

[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...

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.

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...

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.

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 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...

This interactive tutorial discusses the flow of water on the surface and below the surface. You will learn about the causes and actions of wind, and how water and wind move sediment.

In this interactive module students will explore the life cycle of stars and how they produce energy.

Through a series of multi-media learning activities, students will assess the dependence of all organisms on one another and the flow of energy and matter within their ecosystems.

Experience what it's like to work in the field of technology, and take on something never done before. Brainstorm, prototype, plan, implement, work in a team, coordinate between teams, learn from failures or enjoy a success.

This museum provides numerous online exhibits about everything from the science of sports to the Hubble Telescope. Each exhibit includes learning ideas, fun activities, articles, and learning games.

[Free Registration/Login may be required to access all resource tools.] This group of resources use interest in Olympic sports to teach math and physics concepts. Students learn about velocity, the role of gravity, the importance of...

Students study the chemical characteristics of the World Ocean, water chemistry, element cycles, and chemical resources in this multi-media learning module.

Learning modules created by teachers for teachers to increase the "knowledge of and interest" in the atmospheric sciences. Modules include background information, hands-on activities, and assessments. Modules cover topics such as ozone,...

This landing page includes learning modules on the following topics of: animals, plants, microorganisms, life cycles and reproductions, food chains, habits, humans and the environment, adaptation, inheritance, and evolution.

For this arts integrated unit, 3rd graders 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,...