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23 Cards in this Set
- Front
- Back
What happened to Titanic
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hit iceberg, took in water, went vertical and sank
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Bouyancy
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the upward supporting force given to floating objects
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Archimedes
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greek scientists 287-212bc
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Archimedes Principle
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bouyant force is = to weight of liquid object displaces
apparent loss in weight is = to the weight of the liquid displaced |
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Why do some objects sink while others float?
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if the object weighs more than the water is displaces it sinks
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What damage caused people to first think caused the titanic to sink?
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huge gash the ship filled with water and the added weight became greated than bouyant force
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Relationship between bouyant object and water it displaces?
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a bouyant object weighs the same as the water it displaces
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Why are many settlements along coasts?
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cheaper to transport cargo
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Earliest recorded trading routes
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Phoenicians
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Ptolemy
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greek geographer first accurate map of world
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Characteristics of viking ships
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made of oak, 15-30m, powered by sails and oars, flat bottom for safe travel in shallow water
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Viking discoveries
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greenland, canada
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Bartholomue Dias
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sailed around southern tip of Africa
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Columbus
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crossed atlantic landed in bahamas, central and south america
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John Cabot
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explored coast of north america
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Amerigo Vespucci
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first to realize that north america was not part of asia
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Vasco Nunez de Balboa
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sailed across panama and saw pacific ocean
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Ferdinand Magellan
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first circumnavigate
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Giovanni da Verrazano
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explored coast of north america from georgia to mass.
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Jacques Cartier
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traveled st lawrence river and eastern coast of canada
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Captain James Cook
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discovered solution to scurvy(lack of vitamin c) to eat citrus fruits and mapped many islands
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Ben Franklin
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discovered gulf stream / currents traveled east from america
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Charles Darwin
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Sailed on HMS beagle collected and discovered many animals/galapagos islands
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