World of wonder 1 The Earth is a...a) star. planet. O solar system.2 How many planets revolve around the Sun?a) seven right nine3 The Sun is a ...star. b) planet.csolar system.4 The Earth revolves around the Sun at ...a) 52.000 km per hour.108, 000 km per hour.143.000 km per hour.5 The Earth revolves around the Sun in ...24 hours. b) 365, 25 days. c) 7 days.6 The Earth has got a satellite. It's called ...the Moon. b) the Sun, Jupiter.7 The Moon revolves around the Earth.It takes ...24 hours. b) 7 days. 27 days.​