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unit 6 lesson 3
|the tough outer part of a loaf of bread. a hard, dry scrap of bread.
|a loose sleeveless cloak or shawl, worn especially by women.
|the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
|the tough central part of various fruits, containing the seeds.
|the rigid outer part of the earth, consisting of the crust and upper mantle.
|the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
|the region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.