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VOCABULARY Expedition 3 Lesson 1. ancient The walls of the ancient building were crumbling and in ruins. very old; from the distant past develop Inventors develop new sneaker materials that make shoes lighter and more comfortable. to bring into being position
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VOCABULARY Expedition 3 Lesson 1 • ancient • The walls of the ancient building were crumbling and in ruins. • very old; from the distant past • develop • Inventors develop new sneaker materials that make shoes lighter and more comfortable. • to bring into being • position • Ruth was careful to position the pizza in the middle of the table so that everyone could reach it. • the place where something is • astronauts • The astronauts looked out of the spacecraft window and saw the small, blue Earth far below. • someone trained to travel and work in space • astronomy • Nikko took a course in astronomy, because he was interested in learning about the planets and stars. • the scientific study of stars
VOCABULARY Expedition 3 Lesson 3 • surface • The surface of a tennis ball is fuzzy. • the outside part of something • vast • The Pacific Ocean is vast. • very, very large • unit • An inch is a unit of measurement. • a standard amount by which things are measure • orbit • The moon follows an orbit around the Earth. • the path one object takes as it moves around another • organized • The clothes in a local store display are organized by color. • grouped together
VOCABULARY Expedition 3 Lesson 6 • exist • When we read nonfiction, we read about things that exist, such as real people and things. • to be alive or real • direct • The family took a direct route to the campground, without any of the usual side trips. • simple and straightforward • intelligence • The apes showed a sign of intelligence when they used a stick as a tool to get food. • the ability to learn skills and facts, and to apply them in some way • watery • The visitors felt uncomfortable because they were not used to the humid, watery swamp. • having the quality of water • bacteria • To avoid spreading bacteria, always cover your mouth when you cough. • a very small life form; germ
VOCABULARY Expedition 3 Lesson 8 • artificial • The artificial flowers were made of silk and plastic. • made by humans • communication • The communication tools we use today connect people more quickly than did older methods, such as letter writing. • having to do with sending or exchanging information • system • A system of computers and satellites is used to predict the weather . • a set of things acting together • accurate • The forecast of rain proved to be accurate when the thunderstorm struck the city. • correct