Types of waterfalls

Block: Water descends from a relatively wide stream or river.
Cascade: Water descends a series of rock steps.
Cataract: A large waterfall.
Fan: Water spreads horizontally as it descends while remaining in contact with bedrock.
Horsetail: Descending water maintains some contact with bedrock.
Plunge: Water descends vertically, losing contact with the bedrock surface.
Punchbowl: Water descends in a constricted form, then spreads out in a wider pool.
Segmented: Distinctly separate flows of water form as it descends.
Tiered: Water drops in a series of distinct steps or falls.
Multi-step: A series of waterfalls one after another of roughly the same size each with its own sunken plunge pool.

Types of Deserts

There are four types of Desrts

The Hamada Type:

In which the surface consists of bare,polished rock.

The Reg (or Serir) Type:

Consisting of vast sheets of angular pebbels.

The Mountain Type:

Consisting of stark peaks, precipitious slopes and deeply cut ravines

The Erg Type:

Consisting of extensive areas of undulating sand dunes

World's Famous Currents

The names of the famous oceans currents are given as under:

Currents of the Atlantic

1 Benguela current

2-South equatorial current

3-The Brazil current

4-North equatorial current

5-Gulf stream

6-Canaries current

7- Arctic current

8-The Labrador and Greenland current

Currents of the Pacific

1- The Peruvian or Humboldt current

2-New South Wales current

3-Japn current or Kuro Siwo

4-California current

5-Kurile current

Current of Indian Ocean

(South)

1-Antarctic current

2-West Australian current

3-Agulhas current

(North)

4-Somali current