9781422282854

Soviet stamp celebrating the launch of Sputnik in 1957.

WORDS TO UNDERSTAND behemoth: object of massive proportions.

carbon cycle: exchange of carbon between living organisms and the environment. geopolitical: relating to the influence of geography on international politics, and vice versa. incendiary: containing flammable chemicals. isotopes: forms of an element with the same atomic number but different numbers of neutrons. satellite: human-made object that circles the Earth or another object in the heavens.

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SCIENCE AND TECHNOLOGY