NAEP Geography Grade 3 — Questions and Answers
Question 1: The Amazon River basin contains the world's largest tropical rainforest primarily because of which climate factor?
- Cold ocean currents nearby
- High elevation reducing temperatures
- Consistent warm temperatures and heavy rainfall (Correct answer)
- Seasonal monsoon winds only
Correct answer: Consistent warm temperatures and heavy rainfall
The Amazon basin receives consistent heavy rainfall (over 80 inches per year) and maintains warm temperatures year-round, creating ideal conditions for tropical rainforest growth.
Question 2: Which geographic feature forms the natural border between the United States and Mexico along much of their boundary?
- Colorado River
- Rio Grande (Correct answer)
- Pecos River
- Gila River
Correct answer: Rio Grande
The Rio Grande forms the natural border between Texas and Mexico for approximately 1,255 miles of the U.S.-Mexico boundary.
Question 3: A region that produces more food than its population needs and exports the surplus is said to have which agricultural characteristic?
- Subsistence farming
- Commercial surplus agriculture (Correct answer)
- Plantation agriculture
- Slash-and-burn agriculture
Correct answer: Commercial surplus agriculture
Commercial surplus agriculture occurs when a region produces more crops or livestock than needed locally and sells the excess to other regions or countries.
Question 4: Which U.S. state contains the most active volcanoes due to its location on the Pacific Ring of Fire?
- California
- Oregon
- Alaska (Correct answer)
- Washington
Correct answer: Alaska
Alaska has the most active volcanoes in the United States, with over 50 volcanoes that have been active since 1760, due to the Aleutian subduction zone.
Question 5: Urban sprawl most directly causes which environmental problem in surrounding areas?
- Increased biodiversity
- Loss of farmland and natural habitats (Correct answer)
- Improved air quality
- Higher groundwater levels
Correct answer: Loss of farmland and natural habitats
Urban sprawl converts surrounding farmland, wetlands, and forests into developed areas, reducing natural habitats and agricultural land.
Question 6: Which line of latitude marks the northern boundary of the tropics?
- Arctic Circle (66.5°N)
- Tropic of Cancer (23.5°N) (Correct answer)
- Equator (0°)
- Tropic of Capricorn (23.5°S)
Correct answer: Tropic of Cancer (23.5°N)
The Tropic of Cancer at 23.5° North latitude marks the northernmost point where the sun can appear directly overhead, defining the northern edge of the tropics.
Question 7: When a river deposits sediment at its mouth where it enters the ocean, what landform is created?
- Alluvial fan
- Oxbow lake
- River delta (Correct answer)
- Floodplain terrace
Correct answer: River delta
A river delta forms when a river slows down as it enters a body of water and deposits the sediment it has been carrying, creating a triangular landform.
NAEP Geography Grade 3
The Amazon River basin contains the world's largest tropical rainforest primarily because of which climate factor?