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Our Planet Earth

Part 2-Core Concepts

TermDefinition
Orbit the path one object makes as it revolves around another
axis imaginary line between the North and South Poles
revolution elliptical journey around the sun
solstice the point in the calendar year of the longest or shortest day
equinox the point in the calendar year when the length of the day is the same everywhere on Earth
rotation one complete turn on an axis
time zone areas on the Earth that share the same time
core sphere of very hot metal at the center of the Earth
mantle thick, rocky layer the surrounds the core
crust thin layer of rocks and minerals that surrounds the mantle
atmosphere thick layer of gas and air above the surface of the Earth
landforms types of land such as mountains, plateaus, and valleys
weathering process that breaks rock into tiny pieces
erosion process by which water, ice, and/or wind move small pieces of rock
deposition process of eroded material settling
plains large flat areas or gently rolling hills
plateau mostly flat land that rises above surrounding land
valley stretches of low land between mountains or hills
delta flat plains that form when a river fans out and deposits material
plate tectonics theory that states large land plates inside the Earth move
plates large blocks of rock and soil that make up the Earth's crust
magma molten or semi-molten rock stored in the Earth's crust
lava magma that reaches the surface of the Earth
faults seams or cracks in the Earth's crust
Earth the sphere you live on
Created by: tomsheesley