Question

7 matching 6 points select the term or person that best matches each description. some answers will not be used. technology that used radio waves to detect approaching airplanes german invasion of the soviet union period between invasion of poland and attack on norway policy that allowed countries at war to purchase american goods french government that collaborated with the germans lightning war operation barbarossa maquis vichy atlantic charter operation sea lion cash-and-carry sonar blitzkrieg radar

Explanation:

To solve this matching problem, we analyze each description and match it with the appropriate term:

1. Technology that used radio waves to detect approaching airplanes

This is radar (radio detection and ranging uses radio waves for detection).

2. German invasion of the Soviet Union

This is Operation Barbarossa (the code name for the German invasion of the USSR in 1941).

3. Period between invasion of Poland and attack on Norway

This is associated with Operation Sea Lion? No, wait—actually, the “Phoney War” (but from the options, the closest is the period before major action, but the option here is Operation Sea Lion? Wait, no—correction: The period between Poland’s invasion (1939) and Norway’s attack (1940) was the “Phoney War,” but from the options, the best match is Operation Sea Lion? No, actually, the options include “Operation Sea Lion” (planned invasion of Britain) but the period here is the lull. However, rechecking: The options given—“Operation Sea Lion” is a distractor, but the correct match for this description (from standard WWII knowledge) is the “Phoney War,” but since “Operation Sea Lion” is an option, maybe a typo. Alternatively, the intended match is Operation Sea Lion? No, better: The period between Poland (1939) and Norway (1940) is the “Phoney War,” but the options don’t have that. Wait, the options include “Atlantic Charter” (1941), “Vichy” (French collaboration), “cash-and-carry” (US policy), “sonar” (underwater detection), “blitzkrieg” (lightning war), “radar” (air detection), “Operation Barbarossa” (USSR invasion), “Maquis” (French resistance), “Vichy” (collaborationist France), “cash-and-carry” (US policy), “blitzkrieg” (lightning war).

Wait, re-express:

• Technology (radio waves for planes): radar
• German invasion of USSR: Operation Barbarossa
• Period between Poland and Norway: The “Phoney War” (but no option). Wait, the options include “Operation Sea Lion” (planned invasion of Britain, never executed). Maybe the question’s third description is intended to match Operation Sea Lion (as a period of inaction)? Or maybe a mistake. Alternatively, the third description is a distractor, but proceed.

• Policy (countries at war buy US goods): cash-and-carry (US neutrality policy allowing warring nations to buy goods for cash and carry them)
• French government that collaborated with Germans: Vichy (Vichy France was the collaborationist regime)
• Lightning war: blitzkrieg (German term for rapid, coordinated warfare)

Final Matches:

1. Technology (radio waves for planes) → radar
2. German invasion of USSR → Operation Barbarossa
3. Period between Poland and Norway → Operation Sea Lion (note: this is a stretch; the “Phoney War” is the correct term, but “Operation Sea Lion” is the only unused option here)
4. Policy (warring nations buy US goods) → cash-and-carry
5. French collaborationist government → Vichy
6. Lightning war → blitzkrieg

Answer:

(matching each description to term):

• Technology (radio waves) → radar
• German invasion of USSR → Operation Barbarossa
• Period (Poland to Norway) → Operation Sea Lion
• Policy (buy US goods) → cash-and-carry
• French collaboration → Vichy
• Lightning war → blitzkrieg

(Note: Some matches rely on standard WWII historical definitions. For example, “cash-and-carry” was the US policy allowing warring nations to purchase goods for cash and transport them, “Vichy” was the collaborationist French government, “blitzkrieg” means “lightning war,” “radar” uses radio waves for air detection, “Operation Barbarossa” was the German invasion of the USSR, and “Operation Sea Lion” was a planned invasion of Britain (the period between Poland and Norway was the “Phoney War,” but “Operation Sea Lion” is the closest unused option here).)