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Children's Dictionary
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coal a hard black or dark brown substance that is found in the earth and burned as fuel. [1/2 definitions]
core the center part of any round, solid object. The center of the earth is called its core. [1/4 definitions]
crust the outer layer of Earth, another planet, or a moon. [1/5 definitions]
Dead Sea a large salt lake between the countries of Israel and Jordan. The Dead Sea lies at about 1300 feet below sea level, which makes it the lowest known place on the surface of the earth.
dirt loose earth or soil. [1/2 definitions]
earth all of the people who live on Earth. [1/4 definitions]
earthen made up of earth, soil, or dirt. [1/2 definitions]
earthly having to do with the earth; of this world. [1/2 definitions]
earthquake a shaking or other movement of part of the earth's surface. It is caused by movement deep within the earth. Earthquakes can cause the ground to split.
earth science Earth science is the study of the planet Earth. Earth science is especially interested in what the planet is composed of, its weather, and how the planet developed and continues to change over time. Many different sciences, such as geology and meteorology--the study of weather--are part of earth science.
Eastern Hemisphere the half of the earth that contains Europe, Africa, Asia, and Australia.
eclipse the blocking from view of the sun, a moon, or a planet by another heavenly body. In an eclipse of the sun, the sun is hidden from earth's view by the moon passing between the sun and the earth. [1/3 definitions]
embankment a mound of earth or stone made to support a road or protect an area from water.
equator the imaginary circle around the earth that is halfway between the North and South Poles.
extraterrestrial existing or coming from a place outside planet Earth.
fault a break in part of the earth's crust that is like a crack in the surface of the earth. A fault can be small or it can be hundreds of miles long. Because of the break between the surfaces, the surfaces can move and become uneven with each other. [1/4 definitions]
fossil the remains or trace of a living animal or plant from a long time ago. Fossils are found embedded in earth or rock.
full moon the moon when it is on the side of Earth that is opposite the sun and looks from Earth like a complete circle. [1/2 definitions]
galaxy a collection of billions of stars and other matter held together by gravity. Our planet Earth and the sun belong to the Milky Way galaxy. They are only tiny parts of this galaxy.
geography the science of the earth's surface and all life on it. When studying geography, one learns about the different countries and people of the earth, its climate, its natural resources, and its oceans, rivers, and mountains. [1/2 definitions]
geology the study of the physical structure of the earth and how it has changed over time. Geologists gain this knowledge by studying rocks. Some geologists study other planets. [2 definitions]