How can we help?

You can also find more resources in our Help Center.

14 terms

4th - SS - Ch. 9 - Lesson 1,2, 3, & Nigeria Vocabulary

STUDY
PLAY
mesa
a flat landform that rises steeply above the surrounding land; smaller than a plateau
butte
a flat-topped hill, smaller than a mesa
canyon
a deep narrow valley with steep sides
erosion
how water, wind, or ice slowly carry away soil and rock
adaptation
when a kind of animal or plant slowly changes over many years to survive in its environment
Dust Bowl
an area of the Great Plains that experienced terrible droughts and dust storms
aquifer
underground layers of rock or gravel that trap water causing people to dig wells to bring this water to the surface
dry farming
a way to grow crops with only rain water
plateau
a high, flat landform that rises steeply above the surrounding land
petroleum
a nonrenewable natural resource also called oil formed underground over millions of years from the remains of dead plants also called "black gold."
crude oil
oil that bubbles up from the ground and has not been refined
refinery
a factory where crude oil is refined, or separated into parts to be used
petrochemical
chemicals made from petroleum produced in refineries
international trade
countries buying and selling goods to each other