Take an interactive quiz over the molecules of life. After completing the quiz, check your score, and then revisit any incorrect question for further review.

Investigate the three-dimensional structure of different types of organic molecules.

Take this interactive, multiple-choice quiz over the organic molecules important to life, then review your score and any missed questions at the end.

Retrace the development of our knowledge of nucleic acids by viewing pictures of nucleic acids (both DNA and RNA) taken in 1952, 1973, 1979, 1980, 1984 and 2001.

[Free Registration/Login may be required to access all resource tools.] There is good evidence that life has probably existed on Earth for most of Earth's history. Fossils of blue-green algae found in Australia are the oldest fossils of...

Through informational text, interactive activities, animations, and video clips, students examine the chemistry of living things, and they learn how interactions from atoms are fundamental to life as we know it.

Try these five multiple-choice questions about the building blocks of life. The quiz is self-checking, and provides hints to the student if needed.

Find out how the human side of science played a role in the significant discovery of the molecule of life, DNA.

An interactive activity where you can zoom in to explore the macromolecules present in organisms. Learn about proteins, carbohydrates, lipids, and nucleic acid as you investigate the molecular structure of these types of macromolecules....

Take this interactive, multiple-choice quiz over the molecule of life, DNA. Then review your score and any missed questions at the end.

An introduction to the structure and function of the energy-rich molecules, carbohydrates.

This video/lesson series explains how the structure and behavior of H2O in liquid form gives water its properties, and make it a chemical essential for life. Also in this collection: a Victorian-era depiction of the water molecule; news...

An investigation that is part of a series of lab lessons that expose students to Earth Systems through research, data, and visualizations. In this lab, students will follow the pathway of water on a big scale and a small scale down to...

[Free Registration/Login may be required to access all resource tools.] Carbohydrates, proteins, and lipids contain energy. When your body digests food, it breaks down the molecules of these nutrients. This releases the energy so your...

This site is provided for by DNA Interactive. The genome is the entire endowment of genetic information. It is the "Book of life," on an organism. This site demonstrates the methods used to map and sequence the human genome and to...

[Free Registration/Login may be required to access all resource tools.] Covers the structure and properties of water.

A lesson plan that introduces learners to the concept of classifying objects as either living or non-living. From this lesson, students begin to think about the necessary characteristics of life.

[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.] Examines how the first organic molecules were formed.

Take an interactive quiz over organic compounds. After completing the quiz, check your score, and then revisit any incorrect question for further review.

This lesson will show the 8 levels of organization in living organisms, ranging from smallest to largest. It is 2 of 4 in the series titled "8 Levels of Organization."

This lesson will show the 8 levels of organization in living organisms, ranging from smallest to largest. It is 4 of 4 in the series titled "8 Levels of Organization."

This lesson will show the 8 levels of organization in living organisms, ranging from smallest to largest. It is 1 of 4 in the series titled "8 Levels of Organization."

This article describes the race to unlock the mystery of life by determining the double helix structure of the DNA molecule. The discovery of DNA and its structure is an example of collective learning.