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Explain why temperatures vary greatly over the surface of the earth. - Leaving Cert Geography - Question 23 - 2009
Question 23
Explain why temperatures vary greatly over the surface of the earth.
Worked Solution & Example Answer:Explain why temperatures vary greatly over the surface of the earth. - Leaving Cert Geography - Question 23 - 2009
Step 1
Identifying aspect: Variation of solar radiation
Answer
Temperatures vary greatly due to the uneven distribution of solar radiation across the Earth's surface. The equator receives more direct sunlight, resulting in higher temperatures, whereas the poles receive sunlight at a lower angle, leading to cooler temperatures.
Step 2
Discussion: Geographic factors influencing temperature
Answer
Different geographic features such as mountains, oceans, and deserts also contribute to temperature variation. For instance, coastal areas often experience milder temperatures due to the moderating influence of the ocean, while inland areas can have extreme temperature fluctuations. Additionally, elevation affects temperature, with higher altitudes generally being colder.
Step 3
Discussion: Seasonal changes
Answer
Seasonal changes further affect temperature variation. As the Earth orbits the Sun, different regions receive varying amounts of sunlight throughout the year, leading to seasonal temperature differences. For example, summer in the Northern Hemisphere corresponds to warmer temperatures, while winter results in cooler conditions.