Moisture & Synoptic Weather Maps is one of 9 topics in the Grade 10 Geography CAPS syllabus, covered across 3 lessons on Study Vault. Below are real practice questions from this topic with full worked answers.
Sample practice questions
Easy
1. The process by which liquid water changes into water vapour, using energy from the sun, is called:
Evaporation
Condensation
Precipitation
Sublimation of ice
Answer: Evaporation — Evaporation is the process by which liquid water (mainly from oceans and other water bodies) changes into water vapour, using energy from the sun.
Easy
2. Relative humidity is best described as:
The amount of water vapour in the air, expressed as a percentage of the maximum the air could hold at that temperature
The exact number of litres of water in a cubic metre of air
A measurement used only for measuring wind speed
A fixed value that never changes as air temperature changes
Answer: The amount of water vapour in the air, expressed as a percentage of the maximum the air could hold at that temperature — Relative humidity expresses the water vapour present in the air as a percentage of the maximum amount that air could hold at that specific temperature.
Medium
3. What term describes the specific temperature to which air must be cooled for it to become saturated and for condensation to begin?
Answer: The dew point — The dew point is the temperature to which air must be cooled, at constant pressure and moisture content, to reach 100% relative humidity and begin condensing.
