science facts

[talwan]

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• Bamboo can be a fast growing plant, some types can grow almost a metre (3.28 feet) in just one day!
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• While using energy from sunlight, plants turn carbon dioxide into food in a process called photosynthesis.
  
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[talwan]

• Around 2000 different types of plants are used by humans to make food.
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• Onions might taste good but they can be painful to chop. A gas is released when you cut onions that irritates you eyes, the tears you produce while this happens are your body’s way of washing it from your eyes.
  
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[talwan]

• In the agricultural industry, to ensure crops of food grow well water is often added to soil in the form of irrigation.
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• Plant matter found at the bottom of areas with water such as swamps can eventually turn into coal due to a process called metamorphosis (changing form).
  
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[talwan]

• There are over 200,000 identified plant species and the list is growing all the time.
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• Poison ivy produces a skin irritant called urushiol. Touching poison ivy will cause an allergic reaction, usually in the form of an itchy rash on the skin
  
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[talwan]

Fertilizers are chemicals added to plants to help them grow. Important elements in fertilizers include nitrogen, phosphorus and potassium. Manure (animal waste) is also used as a fertilizer.

 

[talwan]

Water Facts:

• Water is made up of two elements, hydrogen and oxygen. Its chemical formula is H[SUB]2[/SUB]O.
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• Each molecule of water is made up of two hydrogen atoms bonded to a single oxygen atom.
  
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[talwan]

• The existence of water is essential for life on Earth.
  
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• Water has three different states, liquid, solid and gas.

 

[talwan]

• The word water usually refers to water in its liquid state. The solid state of water is known as ice while the gas state of water is known as steam or water vapor.

• Water covers around 70% of the Earth’s surface.

 

[talwan]

• The three largest oceans on Earth are the Pacific Ocean (largest), the Atlantic Ocean (second largest) and the Indian Ocean (third largest).

• Found in the Pacific Ocean, the Mariana Trench is the deepest known point in the world’s oceans.

 

[talwan]

• Ocean tides are caused by the rotation of the Earth and the gravitational pull of the Moon and Sun acting on ocean water.

• Water from a sea or ocean is known as seawater. On average, every kilogram (2.2lb) of seawater contains around 35 grams (1.2 oz) of dissolved salt.

 

[talwan]

• The freezing point of water lowers as the amount of salt dissolved in at increases. With average levels of salt, seawater freezes at -2 °C (28.4 °F).

The longest river in the world is the Nile River, it reaches 6650 kilometers length (4132 miles)

 

[talwan]

• The second longest river in the world is the Amazon River, it reaches 6400 kilometres (4000 miles) in length.

• The longest river in the USA is the Missouri River. At around 2,340 miles (3,770 km) in length it is slightly longer than the Mississippi River (2,320 miles). The two combine to form the longest river system in North America.
  

 

[talwan]

• Water makes a good solvent with many sugar, salts and acids easily dissolving in it. On the other hand oils and fats don’t mix well with water.

• The water cycle involves water evaporating (turning into a gas), rising to the sky, cooling and condensing into tiny drops of water or ice crystals that we see as clouds, falling back to Earth as rain, snow or hail before evaporating again and continuing the cycle.

 

[talwan]

• Water in the form of ice is found at the polar ice caps of the planet Mars, some scientists have also suggested the possibility of liquid water on the red planet.

• Pure water has no smell and no taste, it also has a pH level around 7.

• While most people know that water boils at 100 °C (212 °F), this is at the normal conditions of sea level. The boiling point of water actually changes relative to the barometric pressure. For example, water boils at just 68 °C (154 °F) on the top of Mount Everest while water deep in the ocean near geothermal vents can remain in liquid form at temperatures much higher than 100 °C (212 °F).
  

 

[talwan]

• Water expands as it cools from 4 °C to 0 °C (above 4 °C it does the opposite). In freezing conditions, water has been known to burst water pipes as it freezes to ice.
  
  
  
• Water can move up narrow tubes against the force of gravity in what is known as capillary action. Check out this capillary action experiment for more.
  

 

[talwan]

• Most people around the world have access to clean drinking water but it is a major problem in poorer areas of the world. Water pollution and low quality water can lead to dangerous bacteria, disease and viruses such as E coli and Cryptosporidium.
  
  
  
• Drinking water is needed for humans to avoid dehydration, the amount you need each day depends on the temperature, how much activity you are involved in and other factors.
  

 

[talwan]

• An important use for water is in agricultural irrigation, this is when water is artificially added to soil in order to assist the growth of crops.
  
  
  
• Water is used frequently by firefighters to extinguish fires. Helicopters sometimes drop large amount of water on wildfires and bushfires to stop fires spreading and limit the damage they can cause.
  

 

[talwan]

• The water industry helps deliver water to homes in various cities and countries around the world. This can involve services such as purification, sewage treatment, filtering, distillation and plumbing.
  
  
  
• Electricity can be created from hydropower, a process that uses water to drive water turbines connected to generators. There are many hydroelectric power stations around the world.
  

 

[talwan]

• Water also plays a role in cooking. Steaming and boiling food are well known cooking methods. You may have noticed this last time you made pasta or noodles.
  
• Water is also used for fun. Water sports are a very popular recreational activity and include things like swimming, surfing and waterskiing. Ice and snow is also used in ice skating, ice hockey, skiing and snowboarding.

 

[Ramacchandran]

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DIVINE SCIENCE

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[talwan]

Thanks Ramachandranji,
The article was interesting to know on life cycle,
Alwan

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[talwan]

Weather Facts:

• The highest temperature ever recorded in Antarctica is 14.6 °C (59 °F), recorded on January 5, 1974.
  
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• The most rain fall ever recorded in 24 hours is 182.5 centimetres (71.9 inches) in Foc-Foc, La Réunion, during tropical cyclone Denise on January 8, 1966.
  

 

[talwan]

• The most rain fall ever recorded in one year is 25.4 meters (1000 inches) in Cherrapunji, India.

• The highest snow fall ever recorded in a one year period was 31.1 meters (1224 inches) in Mount Rainier, Washington State, United States, between February 19, 1971 and February 18, 1972.

 

[talwan]

• The fastest wind speed ever recorded is 484±32 km/h (301±20 mph). This was a 3 second gust recorded by a Doppler on Wheels (DOW) radar unit in Oklahoma City on May 3, 1999.

• The heaviest hailstone ever recorded weighed 1.0 kg (2.25 lb) and landed in Gopalganj District, Bangladesh on April 14, 1986.

 

[talwan]

• Clouds can be categorized into a number of different types; these include cumulus, stratus, cirrus and nimbus.

• The Earth experiences millions of lightning storms every year, they are incredible discharges of electricity from the atmosphere that can reach temperatures close to 54,000 °F (30,000 °C) and speeds of 60,000 m/s (130,000 mph).