a) Approximately how long ago were the planets formed? b) Earth and Venus are very similar in some ways. State two things they have incommon still and one that is different.(3 marl What caused the changes in Venus? d) What happened to the water on the surface of Venus? e) What caused the thickening of the atmosphere on Venus that lead to its increase in temperature? f) Venus is the hottest planet in the Solar System. What is the surface temperature? What does the surface of Venus look like? h) What is the wind speed on the 'Earth's Evil Twin'? i) What 'falls as rain' on Venus? j) Name the Russian probe that has sent back images of the Planet's surface.