Sahara 1
Sahara 2
Sahara 3
Sahara 4
Sahara 5
100

adaptation

changing way of life to survive in new conditions

100

desert

a region with little rainfall and vegetation

100

erosion

the wearing away of Earth's surface

100

oasis

a place with water in a desert

100

region

an area defined by its characteristics

200

arid

a climate with little to no rain

200

desertification 

land becomes drier until it is a desert.

200

hammada

rock-covered flatland in the sahara

200

pastoral nomads

herders who move their animals from place to place.

200

shifting agriculture

moving to a different area to farm

300

cash crop

a crop that is grown to be sold

300

drought

long period without precipitation

300

landform

natural features of Earth's surface

300

physical features

natural characteristics of Earth

300

technology

tools to help people

400

climate

the weather pattern over a long time

400

economic activities

the making, buying and selling of goods

400

landscape

an area with a certain kind of scenery 

400

precipitation

water that falls from the sky
400

trade winds

tropical winds that blow towards the equator

500

deforestation

clearing away trees from a forest

500
erg

a place with tall sand dunes

500

marginal land

land that is not suited for farming

500

reg

gravel-covered flatland

500

vegetation

all the plants and trees in an area