sdfsfsHow the World WorksSimple and compound machines have been developed to meet people's needs and to make work easier.
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Who We AreHarmful substances affect our health
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Where We Are in Place and TimeHuman exploration for resources influences settlement
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How We Organize OurselvesData is a universal form of communication
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Sharing the PlanetPeople make decisions about how to use the limited natural resources
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How We Express OurselvesPeople express their ideas and feelings through various types of poetry
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