List of Words for Letter ‘F’

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fault A long, narrow crack in Earth’s crust.
fertilization The joining of a female sex cell, the egg, and a male sex cell, the sperm, to produce a fertilized egg.
filter A tool that physically separates matter by size. It has a mesh or a screen that retains the bigger pieces but allows smaller pieces to fall through the holes.
filtration A method of separating the parts of a mixture using a filter.
flood A great flow of water over land that is usually dry.
fold A bend in layers of rock.
food chain The path that energy takes from one organism to another in the form of food.
food web The food chains that overlap in an ecosystem.
force A push or a pull.
forecast A prediction about the weather; the act of making such a prediction.
fossil AAny evidence of an organism that lived in the past.
fossil fuel A source of energy made from the remains of ancient, once-living things.
freeze To change state from a liquid to a solid.
frequency The number of wavelengths that pass a reference point in a given amount of time.
friction A force between surfaces that slows objects or stops them from moving.
front A boundary between air masses with different temperatures.