Question 7 The planets circle the Sun following some very strict laws of physics. 7.1 Which planet circles the Sun in the shortest time?


7.2 State the relationship between the time taken to circle the Sun and the distance of a planet from the Sun.


7.3 Give a possible explanation for this relationship.


7.4 State the relationship between the distance from the Sun and the surface temperature of a planet.


7.5 Give a possible explanation for this relationship.


7.6 Venus is an exception to this pattern. Explain why Venus doesn’t fit the pattern.


Question 8


Earth is the only planet in the solar system at the right temperature for water to be in solid, liquid and gas form. 8.1 Where would you find most of the fresh water on Earth?


8.2 Write the steps in the correct order for the water cycle on Earth. Write just the letter for each step. A – air becomes saturated with water vapour B – water evaporates from oceans, lakes and rivers C – rain falls to the surface of the Earth D – runoff and groundwater eventually reach the sea E – water vapour condenses to form clouds F – air with water vapour rises and cools.


8.3 The water cycle needs energy. At what point does the energy enter the water cycle?


(1)


(1)


(2) (2)


(2) (2)


(3) [12]


(5)


(1) [7]


Total: 70 marks


Exemplar end-of-year exam 197


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