the large parts of the surface of the Earth that rise above sea level

• continents
• secondary sources
• primary sources
• scale

the study of the natural features of the earth's surface

• geography
• continents
• secondary sources
• primary sources

a prominent or well-known object or a feature of a particular landscape

• landmark
• geography
• continents
• secondary sources

any area in which a few forms of life can exist because of lack or water, permanent frost, or absence of soil

• desert
• landmark
• geography
• continents

A natural upward projection of the earth's surface, higher and steeper than a hill and often having a rocky summit

• mountains
• desert
• landmark
• geography

A wide mainly level area of elevated land

• plateau
• mountains
• desert
• landmark

The relative size or extent of something

• scale
• plateau
• mountains
• desert

Information about a historical event in which the creator of the source was alive at that time

• primary sources
• scale
• plateau
• mountains

Materials produced sometime after an event happened.

• secondary sources
• primary sources
• scale
• plateau