Home 0625 Overview Resources About

The Earth

Core concepts and learning points for this section:

Syllabus Points

Core

6.1.1.1 Know that the Earth is a planet that rotates on its axis, which is tilted, once in approximately 24 hours, and use this to explain observations of the apparent daily motion of the Sun and the periodic cycle of day and night
6.1.1.2 Know that the Earth orbits the Sun once in approximately 365 days and use this to explain the periodic nature of the seasons
6.1.1.3 Know that it takes approximately one month for the Moon to orbit the Earth and use this to explain the periodic nature of the Moon’s cycle of phases

Supplement

6.1.1.4 Define average orbital speed from the equation 2 π r v = T where r is the average radius of the orbit and T is the orbital period; recall and use this equation www.cambridgeinternational.org/igcse 37 Subject content