archeologist (noun) arr-kē-'ol-ō-jist a scientist who studies past human culture Archeologists on a dig in Egypt search for ancient objects. argue (verb) 'arr-gyū to disagree or quarrel My sister and I argue about who won the race. arid (adjective) 'ar-rid very dry from lack of rainfall A desert is arid because not a lot of rain falls. astronaut (noun) 'as-trō-not a person trained to go into space An astronaut explores space and collects data. astronomer (noun) a-'stron-ō-murr a scientist who studies the universe Astronomers study the stars, planets, and moons. atmosphere (noun) 'at-muh-sferr the layers of air around Earth Some parts of the atmosphere are warmer than others. atom (noun) 'a-tuhm the smallest unit of a chemical element Matter is made up of atoms. attack (noun) uh-'tak an act meant to hurt or destroy The Vikings put shields on the sides of their ships to protect them from attacks. B balance (noun) 'bal-uhns the state of being steady Artists think about balance so their sculptures don’t fall over. bark (noun) barrk the outside cover of trees Tree bark covers and protects this tree. between (preposition) buh-'twēn in a space that separates two people, places, or things The blue line is between two purple lines. biodegradable (adjective) bī-ō-di-'grād-a-buhl able to break down Some waste such as food products is biodegradable. 327 DICTIONARY archeologist biodegradable
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