Pictionary

Gravity:

The attraction between two masses, such as the earth and an object on its surface. Commonly referred to as the acceleration of gravity. Changes in the gravity field can be used to infer information about the structure of the earth's lithosphere and upper mantle.

External Energy:

It's all the energy that comes from the sun. The main factors determining this energy are the uneven distribution of it rays, the attraction of the Sun, and rotation and shifting.

Internal Energy:

It includes everything that comes from inside planet Earth. It has two main components: Kinetic and Potential.

Kinetic energy is due to the motion of the system particles.

Potential energy is associated with the statics constituents of matter, static electric energy of atoms within molecules or crystals, and the static energy of chemical bonds.

Formation of clouds:

A white or gray mass of very small drops of water or ice that float in the sky.

A cloud is also a mass of something, such as dust or smoke, that moves together.

Rain:

Liquid precipitation from the atmosphere in drops of at least 0.5mm in diameter. Which is formed when water vapor formed by evaporation of water from rivers, oceans, lakes, etc. and also by the transpiration of plants. These vapor elevates to the sky and groups together in a process called condensation, which forms clouds and later it gets heavier and colder so the water gets liquid again and falls in form of rain or snow and/or hailstones.

Rivers:

A natural wide flow of fresh water across the land into the sea, a lake, or another river. They are formed usually by the accumulation of water with a fixed course which forms from the water from glaciers, or underwater water that comes to the surface.

Waterfalls:

Water, especially from a river or stream, dropping from a higher to a lower point, sometimes from a great height. they are formed when valleys of glaciers or rivers are time later occupied by new courses of rivers and when they found these abrupt falls the water falls from them and the course continues.

Sea:

The salty water which covers a large part of the surface of the Earth, or a large area of salty water, smaller than an ocean, which is partly or completely surrounded by land. It is usually a part of the ocean which is near the coast or seashore up to a certain distance from the continental land.

Torrents:

A large amount of water that is moving quickly. They are not always in the same place or even existing during the whole year because they are mostly formed by accumulation of water, mostly of heavily season rains.

Glaciers:

A large mass of ice which moves slowly. It is usually formed by the accumulation of large masses and pressured layers of ice, snow and or hailstones which get together over time. They are mostly found on tops of mountains, volcanoes and polar regions.