Eclipse - a covering of the light from one object in space by the passage of another between it and the observer or between it and its source of light.
Ecosystem - All living organisms in a particular area
Electron - A negatively charged subatomic particle found outside the nucleus in the electron cloud. The number of electrons is equal to the total number of protons.
Electron Cloud – the region surrounding the nucleus of an atom where the electrons are located.
Element - a pure substance that cannot be broken down into simpler substances by physical or chemical means.
Elemental Symbol – the single capital letter or capital letter followed by a lower case letter or letters that represents the name of the element.
Embryology - The study of the formation and development of animals prior to birth
Environment - the surroundings or conditions in which a person, animal, or plant lives or operates.
Equinox - One of two times during the year where there is equal amounts of day and night.
Evolution - the process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.
Fahrenheit - a temperature scale developed in 1724 by German physicist Daniel Gabriel Fahrenheit. It is commonly abbreviated as °F, with water freezing at 32°F and boiling at 212°F. The Fahrenheit scale also defines the average normal human body temperature as ranging from 97.3°F to 98.6°F
Food Chain - a connected series of organisms that shows how energy from food is transferred from one organism to another.
Food Web - a diagram that shows the relationship between organisms in an ecosystem. It is an interconnected set of food chains showing the transfer of energy.
Force - an unseen push or pull on an object
Fossil - the preserved remains of something that was once living.
Fossil Fuel - A type of non-renewable energy source made from the remains of dead plants and animals over millions of years.
Fracking - A process used to increase the amount of natural gas obtained from rocks by injecting them with fluid and breaking apart the rocks.
Fragmentation - a form of asexual reproduction where a parent organism breaks into pieces, and each piece develops into a new, genetically identical individual.
Freezing - A physical change in which a substance changes from a liquid to solid.
Friction - the force felt between two surfaces when one attempts to slide against the other
Front - The boundary between two air masses with different temperature, humidity, or density characteristics.
Full Moon - A lunar phase in which the entire surface of the Moon that is facing the Earth is lit up by light reflected by the Sun.