1.1 Structure of the Earth

Question 1

Solar System

Answer 1

eight planets and their moons in orbit around the sun

Question 2

gravity/gravitational pull

Answer 2

the force that exists between any two objects with mass

Question 3

orbit

Answer 3

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

Question 4

axis

Answer 4

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

Question 5

hemisphere

Answer 5

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

Question 6

Equator

Answer 6

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

Question 7

tropics/tropical zones

Answer 7

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

Question 8

satellite

Answer 8

any object that orbits a planet

Question 9

crust

Answer 9

outermost solid layer of the Earth

Question 10

mantle

Answer 10

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

Question 11

viscous

Answer 11

describes a liquid that flows slowly

Question 12

magma

Answer 12

hot semi-liquid rock found below or within the crust

Question 13

core

Answer 13

the very hot,dense centre of the Earth

Question 14

iron

Answer 14

a metallic element with magnetic properties

Question 15

species

Answer 15

organisms that are able to breed and produce fertile offspring

Question 16

navigate

Answer 16

the process of plotting a course from one place to another

Question 17

migration

Answer 17

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