wa vocabulary Flashcards
1
Q
all societies must address the problems that resources are limited and needs and wants are unlimited.
A
scarcity
2
Q
because we live on one planet and cannot satisfy all of our own needs, we depend on others for mutually beneficial solutions to common problems
A
interdependence
3
Q
a process in which people exchange goods without contacting each other directly
A
silent barter
4
Q
a large, hot desert in North Africa that covers about 3.5 million square miles
A
Sahara
5
Q
a zone of semi desert, south of the Sahara, where short grasses, small bushes, and a few trees grow
A
Sahel
6
Q
a vegetation zone of tall grasses and scattered trees, with a long rainy season
A
savanna
7
Q
the longest river in West Africa, and a kind of trading highway in early times
A
Niger River
