This lesson explains the discovery of the neutron and Chadwick's experimental process.

An online worksheet exploring the cell structure and cell specialization. Worksheet includes diagramming and fill in the blank opportunities related to cell structure.

Reference information about the study of cells. Includes a chart comparing plant and animal cells and one examining the structure of a cell.

This site illustrates different parts of a plant and animal cell. The student may then drag and drop labels to the correct cell part.

Make sure you know your facts before playing this game! Concepts of cellular respiration are the focal point of the questions. Get them correct and hit the target, or get them wrong and your arrow will flop.

Describes the structure of an atom and the characteristics of the electrons, neutrons, and protons inside it. Includes some interesting facts about atoms.

A reference site exploring cell structure. Learn about the structures and functions of the major organelles of the cell. Also included are research questions to better understand the cell.

We're about to move into the modern age of physics. In the early 1800's, scientists began examining the basis of matter, space, and time. Sometimes it gets very confusing, but the big idea is that Newton's physics describe about 90% of...

A nice site which provides descriptions of each of the bones that make up our skeletal system. Then there is a lab activity for students to complete in which they build a skeletal system and describe the structure/function of each bone...

Watch alpha particles escape from a polonium nucleus, causing radioactive alpha decay. See how random decay times relate to the half life. Java required.

This interactive resource provides a large clickable-map graphic of a plant cell. Simply click on the cell part and you are provided with a thorough explanation of nucleus or organelle.

An article reviewing the structure of eukaryotic cells. Learn how the cells have a nucleus, organelles, and chromosomes.

Learn about the structure of a typical plant cell with this informative diagram. The diagram lists important parts such as the nucleus, cytoplasm, leukoplast, cell wall, chloroplast and ribosomes.

Brief description of all the organelles.

Wikipedia offers brief but accurate information on cytoplasm, the matter contained within the plasma membrane of a cell.

See how our DNA is tightly packed up so that six feet of this long molecule fits into the microscopic nucleus of every cell. [1:30]

This lesson focuses on the structure of atoms. All substances are made from atoms. Each atom is made of a nucleus - containing protons and neutrons - surrounded by electrons. It provides a link to an assessment.

[Free Registration/Login may be required to access all resource tools.] There are two basic types of cells, prokaryotic cells and eukaryotic cells. The main difference between eukaryotic and prokaryotic cells is that eukaryotic cells...

Explains what the effective nuclear charge is and how electrons can create a shield between a nucleus and an outer electron. Presents exercises for comparing orbital sizes with effective nuclear charges. Requires Java.

At this online lesson plan read about the exciting Comet Nucleus Sample Return Mission. Understand comets and then go and do the word search.

[Free Registration/Login may be required to access all resource tools.] During mitosis, the DNA in a nucleus must replicate. The copied DNA is divided into two genetically identical sets, so that after cytokinesis or cell division, each...

[Free Registration/Login may be required to access all resource tools.] For many years, archaea were classified as bacteria. Like the bacteria, archaea lacked a nucleus and membrane-bound organelles and, therefore, were prokaryotic...

[Free Registration/Login may be required to access all resource tools.] Humans are in the same domain as trees and algae. What could they possibly have in common? It is the location of their DNA inside their cells. Their cells all have a...

Students will find an explanation of the neutron particle located inside the atom's nucleus. Website also defines isotopes and the process of radioactive decay.