Sabtu, 04 Februari 2012

Weather !

Hello ! Now the topic is about the weather. First let me tell you about the types of clouds .
- Cirrus 
Cirrus clouds are formed in the atmosphere at 8000 m. It looks like feathers in the sky.
- Nimbostratus
Nimbostratus clouds are formed at 2400 m in the atmoshphere. It brings heavy rain and looks like grey blankets in the sky.
- Cumulus 
Cumulus clouds are formed about a height of 2000 m in the atmosphere. Cumulus clouds are white and fluffy like cotton balls.



I like cumulus clouds better than cirrus.
- Stratus
Stratus clouds are formed in the height of 2000 m in the atmosphere. Stratus clouds are flattened sheets of cloud. They cause overcast weather.




- Cumulonimbus 
Cumulonimbus clouds extend from a height 2000 m to 16 000 m in the atmosphere. When Cumulus clouds turn grey grey it is called Cumulonimbus , which can produce hail ,rain or lightning






Fog.
A fog is a low-lying cloud. It is formed when the ground is cold, such as in winter or at night.





It is very hard to see when there's a fog that's this thick.


Dew
Dew is a drops of water on cold objects usually in the early morning or late evening. Dew is formed when water vapour condenses on the leaf which is at a temperature below the dew point.


Wind 
You can't see a wind but u can feel the breeze. When the the Earth is heated up by the Sun, the air above it is also heated up. The warm air expands and rises into the upper atmosphere, then , in another region the surface of Earth is cooler, the air above is also cooler. Thus the cooler air from this region of higher pressure rushes in to replace the warm air.


Positive effects 
The positive effects of wind are to disperse a plants seeds , recreational activities , smell an animal's prey or predators , make the environment more cool.


Negative effects
The negative effects of wind are hurricanes , tornadoes, uproot trees, rocks to erode , even can cause floods.







Hail
During thunderstorms, there are updrafts and upward currents of air , caused by the rising warm air . The updrafts carry raindrops into the upper levels of the atmosphere , the upper levels are very cold so the raindrops freeze as ice.The ice crystals become bigger and heavier until they can't be supported by the updrafts. They then fall to the ground as hail stones.



I hope there's no hail that have a size of mini vans.



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That's all for now ! You can identify the clouds what type is that or even        guess what weather should now be coming up !!