generally hilly, volcanic interiors

New Caledonia
coastal plains with interior mountains

New Zealand
predominately mountainous with some large coastal plains

Nicaragua
extensive Atlantic coastal plains rising to central
interior mountains; narrow Pacific coastal plain interrupted by
volcanoes

Niger
predominately desert plains and sand dunes; flat to rolling
plains in south; hills in north

Nigeria
southern lowlands merge into central hills and plateaus;
mountains in southeast, plains in north

Niue
steep limestone cliffs along coast, central plateau

Norfolk Island
volcanic formation with mostly rolling plains

Northern Mariana Islands
southern islands are limestone with level
terraces and fringing coral reefs; northern islands are volcanic

Norway
glaciated; mostly high plateaus and rugged mountains broken
by fertile valleys; small, scattered plains; coastline deeply
indented by fjords; arctic tundra in north

Oman
central desert plain, rugged mountains in north and south

Pacific Ocean
surface currents in the northern Pacific are dominated
by a clockwise, warm-water gyre (broad circular system of currents)
and in the southern Pacific by a counterclockwise, cool-water gyre;
in the northern Pacific, sea ice forms in the Bering Sea and Sea of
Okhotsk in winter; in the southern Pacific, sea ice from Antarctica
reaches its northernmost extent in October; the ocean floor in the
eastern Pacific is dominated by the East Pacific Rise, while the
western Pacific is dissected by deep trenches, including the Mariana
Trench, which is the world's deepest

Pakistan
flat Indus plain in east; mountains in north and northwest;
Balochistan plateau in west

Palau
varying geologically from the high, mountainous main island of
Babelthuap to low, coral islands usually fringed by large barrier
reefs

Panama
interior mostly steep, rugged mountains and dissected, upland
plains; coastal areas largely plains and rolling hills

Papua New Guinea
mostly mountains with coastal lowlands and rolling
foothills

Paracel Islands
mostly low and flat

Paraguay
grassy plains and wooded hills east of Rio Paraguay; Gran
Chaco region west of Rio Paraguay mostly low, marshy plain near the
river, and dry forest and thorny scrub elsewhere

Peru
western coastal plain (costa), high and rugged Andes in center
(sierra), eastern lowland jungle