Quick Facts

• Pesticides can cause pollution and kill other organisms. Steps must be taken to manage development and at the same time to maintain the balance in nature.
• The unit Kelvin is named after a Scottish physicist, William Thomson, the first lord Kelvin (1824-1907)
• Cubit is the distance from the elbow to the end of the middle finger.
• The largest cell produced by a living thing is the ostrich egg.
• The human body consists of about 50 000 million cells.
• The vacoules in the plant cells bigger than the vacoules in the animal cells because the plant cells contain cell sap that take in water to keep the cell firm.
• Millions of bacteria live hamlessly in the gut or skin of humans and other animals.
• Cigarette smoke contains more than 4 000 chemicals.
• The main pollutants in cigarette are nicotine, tar and carbon monoxide.
• A typical wind generator is capable of generating up to 60 kW of electrical power.
• Dogs can hear sound from a Galton whistle, which cannot be heard by human beings.
• Pitcher plants are adapted to grow in soils that are poor in nitrogen compounds. They trap insects and digest them to obtain the nitrogen-containing substances.
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