Classification of landforms
First-order landformsSecond-order landformsThird-order landforms
  • Continents
  • Oceans
  • Mountains
  • Plateaus
  • Plains
  • Valleys
  • Beaches
  • Sand dunes
First order landforms
  • First order landforms: Continents and oceans.
  • Continents are the huge land masses on Earth. 
  • Huge water bodies are called Oceans.
Isthmus: A narrow strip of land which connects two large landmasses or separates two large water bodies.
Seven continents are:
  1. Asia
  2. Africa
  3. North America
  4. South America
  5. Antarctica
  6. Europe and
  7. Australia
Largest continent: Asia
Smallest continent: Australia
Five oceans of Earth are:
  1. Pacific
  2. Atlantic
  3. Indian
  4. Southern and
  5. Arctic Ocean
Largest ocean: Pacific Ocean
Smallest Ocean: Arctic Ocean