Question 1.1 [1 mark]
Heat is concentrated at the equator due to which of the following?
A. Low-angle solar radiation striking the equator
B. Larger surface area at the equator
C. Smaller surface area at the equator
D. None of the above
Question 1.2 [1 marik]
On which of the following days would the winter solstice fall in the southern
hemisphere?
A. 21 june
B. 21 December
C. 23 September
D. 21 March
Question 1.3 [1 mark]
A tropical air mass has which of the following characteristics?
A. Cold, dry and unstable
B. Hot, dry, and stable
C. Cold, dry and stable
D. Hot, moist and unstable

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Let's analyze each question step by step:

### Question 1.1
**Heat is concentrated at the equator due to which of the following?**
- **A. Low-angle solar radiation striking the equator**: This is incorrect because the equator receives high-angle solar radiation, which means the sun's rays strike directly.
- **B. Larger surface area at the equator**: This is incorrect; the surface area is not larger at the equator compared to other latitudes.
- **C. Smaller surface area at the equator**: This is also incorrect; the equator does not have a smaller surface area.
- **D. None of the above**: This is the correct answer because the concentration of heat at the equator is primarily due to the direct sunlight received, not any of the options listed.

**Answer: D. None of the above**

### Question 1.2
**On which of the following days would the winter solstice fall in the southern hemisphere?**
- **A. 21 June**: This is the summer solstice in the southern hemisphere.
- **B. 21 December**: This is the winter solstice in the southern hemisphere.
- **C. 23 September**: This is the spring equinox in the southern hemisphere.
- **D. 21 March**: This is the autumn equinox in the southern hemisphere.

**Answer: B. 21 December**

### Question 1.3
**A tropical air mass has which of the following characteristics?**
- **A. Cold, dry and unstable**: This is incorrect; tropical air masses are not cold.
- **B. Hot, dry, and stable**: This is partially correct but does not fully describe tropical air masses, which are typically moist.
- **C. Cold, dry and stable**: This is incorrect; tropical air masses are not cold.
- **D. Hot, moist and unstable**: This is the correct answer as tropical air masses are characterized by being warm and humid.

**Answer: D. Hot, moist and unstable**

### Summary of Answers:
1. D. None of the above
2. B. 21 December
3. D. Hot, moist and unstable
**Answers:** 1. D. None of the above 2. B. 21 December 3. D. Hot, moist and unstable

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