Summaries after sample
, Ocean currents
Distance from the equator
• Places affected by the warm Agulhas Current have warmer
oceans – higher temperatures. • Temperature:
• Places affected by the cold Benguela Current have colder - The sun shines more directly on the equator for more
oceans – lower temperatures. hours than anywhere else – places near the equator
• Winds blowing over warm currents carry moist air to the are much hotter.
land – the vapour condenses when it rises over mountains. - As distance from the equator increases, less heat is
received, and heat is spread over more area.
• Precipitation:
- Warm equatorial areas cause heated and damp air to
rise and cool - forms clouds and rainfall.
• Sample
Mountains
Forced ascent of wind:
- Moist wind blowing towards a mountain from
the ocean causes air to rise and cool – the
U1: Factors
that influence Distance from the sea
vapour condenses to form clouds and rain. temperature
•
Summaries after sample
Funnelling of wind:
- The mountains funnel the air into the central
plains – causes extremely cold winters.
and rainfall
•
•
Coastal areas experience mild temperatures, and places
inland have greater temperature differences.
Oceans are heated more slowly in the day, and cool
slower than land at night.
• Blocking of wind:
- The plateau of Tibet blocks the plain of the
Indus and Ganges Rivers from the cold Height above sea level (altitude)
Siberian winds.
• Higher altitudes result in lower temperatures.
• Mountain slopes and temperature: • The ground absorbs the sun’s short-wave rays and re-
- North-facing slopes are warmer than south- radiates heat as long-wave rays which are absorbed by
facing slopes. the air.
• The atmosphere can’t absorb the short-wave rays.
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, Sample
Summaries after sample