Question

how do the mississippi and amazon rivers differ?
check all that apply.

a. the amazon is much longer than the mississippi.

b. getting to the amazon by land is more difficult.

c. the amazon has a 5,000-square-mile dead zone at its mouth.

d. the mississippi has always been more of a major highway.

Explanation:

• Option A: The Mississippi River is about 3,730 km long, and the Amazon River is about 6,400 km long, so the Amazon is longer. But let's check other options too.
• Option B: The Amazon is surrounded by dense rainforest and less developed land infrastructure, making land access more difficult compared to the Mississippi which has more accessible land routes.
• Option C: The dead zone at the mouth is associated with the Mississippi, not the Amazon, due to agricultural runoff.
• Option D: The Mississippi has been a major transportation route (highway) for trade and travel historically, while the Amazon's transportation use is more limited due to its environment.

So the correct options are B, D (and A is also correct in terms of length, but let's confirm each):

• A: Amazon is longer (Mississippi ~3730 km, Amazon ~6400 km) – correct.
• B: Land access to Amazon is harder (rainforest, less roads) – correct.
• C: Dead zone is Mississippi's – incorrect.
• D: Mississippi is a major highway (transportation) – correct.

Wait, but let's recheck:

• A: The Amazon is longer than Mississippi? Yes, Amazon is one of the longest rivers (often considered the longest, though some say Nile, but in terms of length, Amazon is longer than Mississippi. So A is correct.

• B: Getting to Amazon by land is more difficult – yes, because Amazon is in the Amazon rainforest with less developed land routes, while Mississippi is in more populated/developed areas with better roads. Correct.

• C: Dead zone at mouth – Mississippi has a dead zone due to fertilizer runoff from Midwest farms, Amazon does not. So C is incorrect.

• D: Mississippi has always been a major highway – yes, for trade, shipping, etc. The Amazon's river transport is more for local use or less intensive, and land access is harder, so Mississippi is more of a major highway. Correct.

So correct options are A, B, D.

Answer:

A. The Amazon is much longer than the Mississippi.
B. Getting to the Amazon by land is more difficult.
D. The Mississippi has always been more of a major highway.