1.1 Structure of the Earth

eight planets and their moons in orbit around the sun

the force that exists between any two objects with mass

the path of an object as it moves around a larger object

the imaginary line between the Earth’s North and South Pole

half of a sphere; the Earth can be considered to be made of two hemispheres divided by equator

an imaginary line drawn round the Earth, halfway between the North and South Pole

The region between the Tropic of Cancer and the Tropic of Capricorn, between which the Sun moves directly overhead during a year

any object that orbits a planet

outermost solid layer of the Earth

the region of the Earth found between the crust and the core

describes a liquid that flows slowly

hot semi-liquid rock found below or within the crust

the very hot,dense centre of the Earth

a metallic element with magnetic properties

organisms that are able to breed and produce fertile offspring

the process of plotting a course from one place to another

movement of animals from one region to another, usually in response to changes in the seasons