Natural Sciences and Technology Grade 6 Term 4

Natural Sciences and Technology Grade 6 Term 4: Planet Earth and Beyond The Solar System (ppt 3)

Topic 1 The Solar System The Planets Natural Sciences and Technology - Grade 6

Outer Planets • Known as the gas giants. • Some have many moons. Natural Sciences and Technology - Grade 6

Jupiter • It is the fifth planet from the Sun and also the largest planet. • First gas planet [90% hydrogen - has clouds of ammonia and 10% helium]. • Mass is 318 times that of Earth. • Takes 12 years to orbit the Sun. Natural Sciences and Technology - Grade 6

Jupiter • • • Three thin dark rings, made of dust. 4 big moons and 60 smaller moons. Fast winds blow from east to west. Colour is light pink-brown. Distance from the Sun is 142 800 km. Surface temperature is -145 ºC. Natural Sciences and Technology - Grade 6

Saturn • Saturn is the sixth planet. • Gas planet of hydrogen and helium. • Famous for its bright colourful rings made of frozen water. Natural Sciences and Technology - Grade 6

Saturn • Furthest planet from Earth that can be seen without a telescope or binoculars. • Has 62 moons. • It takes 29. 45 years to orbit the Sun. • The average temperature is -141ºC. Natural Sciences and Technology - Grade 6

Uranus • A smooth blue-green gas planet. • It is called an ‘ice giant, ’ because it is mostly made of frozen gas [hydrogen, helium and methane]. • It has 9 dark and 2 brightly coloured rings. Natural Sciences and Technology - Grade 6

Uranus • It has 27 known moons. • Uranus turns on its axis once every 17 hours and 14 minutes. • It takes 84 years to orbit the Sun. • The average temperature is -216 ºC. • Its distance from the Sun is 3 000 M km. Natural Sciences and Technology - Grade 6

Neptune • It is the furthest away from the Sun. • It is a gas planet. • It has fast, strong winds of 1 400 km/h. Natural Sciences and Technology - Grade 6

Neptune • 14 Moons. • It takes 165 years to orbit the Sun. • Surface temperature is -201 °C. • It was discovered on the 23 rd September 1846. Natural Sciences and Technology - Grade 6

Dwarf Planets • Dwarf planets are also known as a planetoids/plutoids. Eris Pluto Ceres Haumea Natural Sciences and Technology - Grade 6 Makemake

Pluto • It is no longer a planet since 2006. • Largest known dwarf planet. • It has an irregular orbit – tilted and elongated. • Surface temperature is -225 °C. • It has 5 moons – one is very large. Natural Sciences and Technology - Grade 6

Eris • Orbit period around the Sun is 560 years. • It was discovered on 5 th January 2005. • It has only one moon, known as Disnomia. Natural Sciences and Technology - Grade 6

The Inside Story • What rock planets look like inside: Natural Sciences and Technology - Grade 6

The Inside Story • What gas planets look like inside: Natural Sciences and Technology - Grade 6