List of Words for Letter âFâ
Click on 
to hear the word and definition
-
fault a break, or crack, in the rocks of the lithosphere along which movements take place; usually located along the boundaries between tectonic plates
-
fault zone
an area where there are many interconnected faults; usually located along the boundaries between tectonic plates
-
feldspar the name of a group of minerals that makes up almost 60% of Earth's crust
-
fibrous roots
roots that do not grow deep but branch out into a network of thin, hairy roots; can form thick mats
-
fission
the splitting of atoms into pieces
-
flagella
long, hairlike structures that whip and lash to help flagellates swim
-
flagellate
a protozoan that has flagella, or long, hairlike structures that whip and lash to help it swim
-
flood plain
the flat area of land on both sides of a river
-
focus
the point below the surface of the earth where an earthquake begins
-
food chain
an arrangement that shows how energy flows from one organism to another in an ecosystem
-
food vacuole
a structure inside certain cells where food is digested
-
food web
an arrangement that shows all the food chains in an ecosystem and how they overlap
-
forest floor
the bottom level of the rain forest, which receives little or no sunlight
-
fossil
the remains of an ancient plant or animal
-
fossil fuel
a fuel that comes from the remains of plants and animals and is formed beneath the surface of Earth over millions of years
-
frequency
the number of vibrations a wave makes in a given period of time, usually 1 second
-
friction
the force that acts when two surfaces rub against each other
-
fumarole
a hole in the ground through which gases and hot vapors pass; located in a volcanic region
-
fusion
the process of merging nuclei with smaller masses to make a nucleus with a larger mass