The History of the Earth: Supplemental Guide 1 | Our Home, Earth 15Core Vocabulary
equator, n. The imaginary line around the center of the earth, halfway
between the North and South Poles
Example: Isabelle is from Ecuador, which is a country in South America
near the equator.
Variation(s): none
geologist, n. Someone who studies the history of the earth
Example: Geologists study rocks to fi nd out more about Earth’s history.
Variation(s): geologists
geology, n. The scientifi c study of the earth and how it has changed over
time
Example: If you are interested in volcanoes and earthquakes, you may
be interested in studying geology.
Variation(s): none
pressure, n. The continuous force of one object on another
Example: The heavy weight of the books put pressure on the shelf,
causing it to break.
Variation(s): pressures
surface, n. The topmost layer or the outside (exterior) of something
Example: She wiped the surface of the table with a wet cloth after
dinner.
Variation(s): surfaces