1. What is the primary function of warm ocean currents in the Earth's global climate system?
- A. They absorb excess heat from the atmosphere near the poles.
- B. They transport thermal energy from equatorial regions toward the poles.
- C. They increase the salinity of polar seas, preventing them from freezing.
- D. They create high-pressure systems that block cold air from moving over land.
2. By what primary mechanism does a warm ocean current transfer heat to the air of a nearby coastal region?
- A. Increased evaporation from the warm water cools the air.
- B. The current releases stored thermal energy to the cooler air above it.
- C. Friction from the fast-moving water generates heat in the atmosphere.
- D. The current reflects a large amount of solar radiation toward the land.
3. Compared to an inland area at the same latitude, a coastal area near a warm ocean current will most likely experience which of the following?
- A. Lower average humidity
- B. Higher average air temperature
- C. Greater daily temperature swings
- D. Colder average winter temperatures
4. A scientist observes that a coastal city in a northern latitude has unusually mild winters for its location. Which phenomenon is the most probable cause?
- A. The city is located in a rain shadow.
- B. A nearby warm ocean current is present.
- C. The region has very low atmospheric pressure.
- D. The Earth's tilt is greater in that hemisphere.
5. Two cities are located at the same latitude. City A is on the coast near a warm ocean current, while City B is far inland. What is the most likely climatic difference between them during winter?
- A. City A's winters will be colder and snowier.
- B. City B's winters will be milder and rainier.
- C. Their winter climates will be identical.
- D. City A's winters will be significantly milder.
6. A coastal region experiences a sudden, dramatic drop in air temperature. A scientist finds this is caused by a change in a nearby ocean current. What must be true about the new current?
- A. It is much warmer than the air.
- B. It is flowing much faster than before.
- C. It is much colder than the air.
- D. It is the same temperature as the air.
7. Which scenario will result in the most rapid warming of the air?
- A. Air at 15°C over water at 18°C
- B. Air at 20°C over water at 10°C
- C. Air at 5°C over water at 20°C
- D. Air at 25°C over water at 28°C
8. What is the primary factor that determines how strongly an ocean current will influence the temperature of the air above it?
- A. The speed at which the ocean current is flowing.
- B. The salinity of the water in the ocean current.
- C. The depth of the ocean current below the surface.
- D. The magnitude of the temperature difference between the water and the air.
9. Imagine a polar air mass with a temperature of -5°C moves over a warm ocean current with a water temperature of 15°C. What is the most likely outcome?
- A. The air temperature will decrease further.
- B. The temperature of the ocean current will rise.
- C. There will be a significant transfer of energy from the ocean to the air, causing the air to warm.
- D. There will be little to no change in the air temperature because the air is too cold.
10. In which of the following scenarios would an ocean current have the LEAST effect on the local air temperature?
- A. Air at 25°C over water at 26°C
- B. Air at 10°C over water at 25°C
- C. Air at 0°C over water at 12°C
- D. Air at 30°C over water at 15°C