1
A comet passes close to the Earth.
An astronomer observes the position of the comet and the Earth on the same day
each week for several weeks.
(a) The diagram shows her observations for weeks 1 to 11.
7
--------
2
5
11
8 9
10,
6
7
8
Path of Earth
Path of comet
Position of Earth week 1
Position of comet week 1
9
3-4-
2
10
1●
10
11
-4-1
(i) Complete the path for the comet between week 5 and week 7.
(ii) Mark an X on the diagram to show the position of the Sun.
(iii) Suggest why the astronomer did not observe the comet during week 6.
(1)
(1)
(1)
