Passage Reference: Normally, the Gulf Stream, laden with heat soaked up in the tropics, meanders up the east coasts of the United States and Canada.

Common Mistake: Some students choose cold because cold water is mentioned later. But that happens after the heat is given up, not at this stage. This is a wrong section trap.

Paraphrasing: Passage: 'laden with heat soaked up in the tropics' = Diagram: 'carries ___ from the tropics'

Tips: For each diagram label, ask yourself which stage of the process it shows and match it to the same stage in the passage.

Key Vocabulary:

• laden = full of
• tropics = hot regions near the equator

Question Focus: The diagram shows what happens to the water after it gives up heat. We need the result of cooling.

Correct Answer: E

Passage Reference: Having given up its heat to the air, the now-cooler water becomes denser and sinks into the North Atlantic by a mile or more in a process oceanographers call thermohaline circulation.

Why this is correct: The diagram shows cooled water changing before it sinks. The passage says the now-cooler water becomes denser and then sinks. So the correct label is denser.

Common Mistake: Students sometimes pick cold because the water is cooler. But the diagram asks about the property that makes it sink, not the temperature itself. This is a partial truth trap.

Paraphrasing: Passage: 'becomes denser' = Diagram: 'water becomes ___'

Tips: Pay attention to cause and effect. Cooling causes density to increase, and density causes sinking.

Key Vocabulary:

• denser = heavier for its size
• sinks = goes down

Question Focus: The diagram labels the name of the deep-water current created by sinking cold water.

Correct Answer: A

Passage Reference: This massive column of cascading cold is the main engine powering a deep-water current called the Great Ocean Conveyor that snakes through all the world's oceans.

Why this is correct: The diagram points to the large global current created by sinking water. The passage names this current the Great Ocean Conveyor. So that is the correct answer.

Common Mistake: Some students choose North Atlantic because that ocean is mentioned nearby. But the diagram asks for the current's name, not its location. This is a context shift trap.

Paraphrasing: Passage: 'deep-water current called the Great Ocean Conveyor' = Diagram: 'name of the global current'

Tips: When a diagram asks for a name, look for capital letters in the passage. They often signal the exact answer.

Key Vocabulary:

• deep-water current = ocean flow far below the surface
• snakes = moves in a winding way

Question Focus: The diagram shows what builds up in the North Atlantic and interferes with sinking.

Correct Answer: B

Passage Reference: But as the North Atlantic fills with fresh water, it grows less dense, making the waters carried northward by the Gulf Stream less able to sink. The new mass of relatively fresh water sits on top of the ocean like a big thermal blanket, threatening the thermohaline circulation.

Why this is correct: The diagram shows a layer that stops water from sinking. The passage says the North Atlantic fills with fresh water, which is less dense and sits on top. So the answer is Fresh water.

Common Mistake: Students sometimes choose heat because heat is discussed earlier. But here the problem is caused by water type, not temperature. This is a wrong section trap.

Paraphrasing: Passage: 'fills with fresh water' = Diagram: 'buildup of ___ on top of the ocean'

Tips: Follow the passage order carefully. Diagram labels usually move forward through the text, not backward.

Key Vocabulary:

• fresh water = water without salt
• less dense = lighter

General Tips:

• Diagram questions follow the passage order. Use the previous answer's location to find the next one.
• Always read the full sentence in the passage, not just one keyword.
• If two options seem possible, ask what exact role the diagram blank plays in the process.
• Cross out each option after you use it so you do not reuse it by mistake.