Activity 7 Use a diagram to investigate seasonal changes in length of day and night


Learner’s Book page 20


Guidelines to implement this activity Use the globe and torch to illustrate how the tilt of the Earth on its axis affects where the sun's rays fall. Rotate the globe and show how the length of the day is affected by the tilt of the axis and the point where the sun is directly overhead.


Suggested answers


1 18:00 (There are 12 hours day and 12 hours night at the equator.) 2 24 hours 3 A thick coat and fur boots. It is winter and far south towards the Antarctic Circle so it will be very cold.


Activity 8


Use a diagram to investigate length of day when it is summer in the southern hemisphere


Learner’s Book page 21 Suggested answers


1 24 hours 2 Approximately sixteen hours of daylight 3 No. They have 12 hours day and 12 hours night all through the year. It is always hot.


Activity 9 Use graphs to investigate seasonal temperature changes


Learner’s Book page 22


Guidelines to implement this activity Ask the learners to study the graphs and write down three to four points about them, before they do the activity.


Suggested answers


1.1 Durban: February; Yellowknife: May 1.2 Durban is in the southern hemisphere so summer is November to February. Yellowknife is in the northern hemisphere so summer is in May to August.


2 Durban 25ºC, Yellowknife 15ºC 3 Durban 16ºC, Yellowknife -32ºC 4 Yellowknife is much closer to the pole and further from the equator than Durban.


46


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58