Grade 7 · Social Studies · Natural and Historic Built Environments (Earth and the Solar System)
The Sun is a star at the centre. Eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune. Earth rotates on its axis every 24 hours (day and night) and revolves around the Sun in about 365¼ days (a year; a leap year has 366 days). The Moon orbits Earth. Earth's axis is tilted 23.5°.