Sunday, May 19, 2019

Explanation Text (Explanatory) : What Causes Air to Rise

Explanation or also knows as explanatory text is a kind of text that explain the processes involved in the formation or workings of natural or sociocultural phenomena.

Explanation Text is a kind of Factual Genre. Explanation Text consist of two structure, they are general statement and explanation.

General Statement provides a general statement to position the reader. It focuses on generic, non human participants.

Explanation gives a sequence explaining of why or how something occurs. It is comprised mainly material and relational process, temporal, causal circumstances and conjunctions.

Here is one of the example of Explanation or Explanatory text. It explains about science. It is About The causes air to rise. Remember that it is just a simple example. You can develop by your self according your need and your tasks from your teacher. You may use it as a reference.

What Causes Air to Rise? 

There are several ways in which air can be forced to rise, thus causing the water droplets to condense. We will look at each of these in turn.

1. The air is heated from the ground
This tends to occur mainly in the tropics, where the air in contact with the ground is warmer than the air above. So it will rise. As a result, sometimes huge thunder–clouds (called cumulonimbus clouds) form and the associated rainfall can be very heavy. This type of rainfall is called convection rain.

2. The air is forced to cross a mountain barrier
As an air mass crosses a mountain barrier, it is forced to rise. If the mountains are sufficiently high and the air mass contains enough moisture, clouds will form and rain will fall on the windward side (the side closest to where the air mass is coming form). This rainfall is known as orographic rain, meaning “caused by the shape of the land”. The air mass, now drier and warmer, will continue to flow down the other side of the mountains (the leeward side).

3. Air rises as it enters an area of low pressure
As air rises, other air must replace it which, in turn, also rises. This is a complex process. As the air rises, it moves in a spiral, but if enough air enters an area of flow pressure, clouds will form and rain may fall

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