[Free Registration/Login may be required to access all resource tools.] Breathing is only part of the process of bringing oxygen to where it is needed in the body. After oxygen enters the lungs, what happens? Learn more about processes...

[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...

Understand the water cycle.[Free Registration/Login may be required to access all resource tools.]

[Free Registration/Login may be required to access all resource tools.] Describes the water cycle.

[Free Registration/Login may be required to access all resource tools.] Instructional videos, grade-level texts, interactive activities, and quick assessments about rocks and processes of the rock cycle.

[Free Registration/Login may be required to access all resource tools.] A complete, web-based, multi-media textbook covering a wide variety of Earth science concepts for middle grades.

[Free Registration/Login may be required to access all resource tools.] Technological design and steps of the technological design process.

[Free Registration/Login may be required to access all resource tools.] Role of investigations in science and the steps of the scientific method.

[Free Registration/Login may be required to access all resource tools.] Role of investigations in science and the steps of the scientific method.

NOVA's Earth system science collection highlights important Earth processes normally invisible to the human eye. The standards-based media resources below expose the intricate web of forces that sustain life on Earth, allowing educators...

[Free Registration/Login may be required to access all resource tools.] Learn about the process of mineral formation.

[Free Registration/Login may be required to access all resource tools.] How mountains are formed as a result of plate tectonic processes.

[Free Registration/Login may be required to access all resource tools.] How mountains are formed as a result of plate tectonic processes.

Explore the science of breathing.

A collection of science lessons where students explore the characteristics of different materials and everyday objects and create their own objects and art. They study the properties of the materials that make them strong, absorptive,...

[Free Registration/Login may be required to access all resource tools.] The scientific method is a process used to investigate the unknown. It is the general process of a scientific investigation. This process uses evidence and testing....

A collection of teacher resources on the "how to" incorporate the nature and process of science into your curriculum. Site includes tips for the teacher, sample starting activities, teaching tools, and sample lessons.

[Free Registration/Login may be required to access all resource tools.] The process of DNA replication is not always 100% accurate. Sometimes the wrong base is inserted in the new strand of DNA. This wrong base could become permanent. A...

[Free Registration/Login may be required to access all resource tools.] Nutrients in the foods you eat are needed by the cells of your body. How do the nutrients in foods get to your body cells? What organs and processes break down the...

[Free Registration/Login may be required to access all resource tools.] Cloning is the process of creating an exact replica of an organism. The clone's DNA is exactly the same as the parent's DNA. Bacteria and plants have long been able...

[Free Registration/Login may be required to access all resource tools.] DNA must replicate (copy) itself so that each resulting cell after mitosis and cell division has the same DNA as the parent cell. DNA replication occurs during the S...

[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.] Definition of a change of state and the physical processes that cause it.

[Free Registration/Login may be required to access all resource tools.] The mRNA, which is transcribed from the DNA in the nucleus, carries the directions for the protein-making process. mRNA tells the ribosome how to create a specific...