Figs. 4.1, 4.2, 4,3 and 4.4 show weather instruments. [Figure 4.1] [Figure 4.2] [Figure 4.3] [Figure 4.4]

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.

1. [2] • Fig. 4.1.: Air pressure; • Fig. 4.2.: Wind speed; • Fig. 4.3.: Wind direction; • Fig. 4.4.: Humidity. Note: 3 or 4 correct - 2 marks 1 or 2 correct - 1 mark
2. [3] Wind direction • More often from SSW/less often from N; • 10% from SSW v 5.5–5.7% / below 6% from N; Wind speed • Stronger/faster winds from SSW/less strong / slower from N/more variation in SSW/less variation from N; • N most winds 3–5 m/s v SSW most winds 5-8 m/s; • 8-16 (m/s)/8-11 (m/s)/11–16 (m/s) / above 11 from SSW v 8-16 (m/s)/8–11 (m/s)/11–16 (m/s) not present in north / up to 8 (m/s) from north / max. 8 in N, 16 in SSW. Comparison of categories of wind speed • 0-3 (m/s) (purple): % is lower in North / 1.4–1.6% N v 2% SSW; • 3-5 (m/s) (blue): % is higher in North / 3.5–3.6% N v 3.2–3.4% SSW; • 5-8 (m/s) (orange): % is lower in North / 0.7–0.9% N v 3.2–3.4% SSW. Note: Reserve 1 mark for stats.
3. [3] • In open space / away from buildings / away from trees / away from shade; • So air circulates freely / wind not blocked / sunlight not blocked (by buildings and trees) / to avoid buildings giving off heat; • So temperature not lowered / so temperature is measured accurately; • Above / off the ground (ignore references to height); • To avoid heating from the ground / radiating; • In a fenced area; • To keep animals and people away; • On grass; • To avoid reflection / radiation / absorption of heat; • Face away from sun / avoid direct sunlight in Northern hemisphere / Southern hemisphere.