Amazon River quiz

More questions about Amazon River

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   What product drove the Amazon boom of 1879 to 1912?

   Answer: Rubber

   Why: Brazil lost its rubber monopoly to British plantations in Asia, grown from seeds taken out of Brazil in 1876.

2. 2 Medium

   What kind of fish is the electric eel?

   Answer: Knifefish

   Why: Most of its knifefish relatives are only weakly electric: they use electricity to sense their surroundings, not to stun.

3. 3 Hard

   At which city is the lower Amazon River at its narrowest point?

   Answer: Óbidos

   Why: The river constricts to roughly 1.7 kilometers at Óbidos, funneling its enormous volume through a channel nearly 100 meters deep.

4. 4 Easy

   Which Amazon floodplain fruit became a global health food?

   Answer: Açaí

   Why: Most of it comes from Pará, the Brazilian state at the Amazon's mouth, which grows about 95% of the country's crop.

5. 5 Medium

   What fish do aquarium shops sell as the 'vegetarian piranha'?

   Answer: Pacu

   Why: Unlike the piranha's pointed, razor-sharp teeth, the pacu's teeth are square and straight, and it eats mostly plants.

6. 6 Hard

   Which mountain peak is the most distant source of the Amazon?

   Answer: Nevado Mismi

   Why: GPS measurements in 2000 confirmed the Carhuasanta stream on Nevado Mismi as the Amazon's ultimate headwater.