Monday, May 30, 2011

The Delicious Orange

The orange is a hybrid between the pomelo and the mandarin cultivated long ago. It is an evergreen flowering tree that grows to a height of 9 – 10 metres. Some very old trees can grow up to 15 m.

The orange fruit belongs to the family of berries known as hesperidium. The delicious sweet fruit can be peeled or cut and eaten whole as a fruit. It can also be processed to extract orange juice and for the peel which is fragrant.

The orange has numerous seeds, is fleshy and soft and is covered by rough thick outer skin known as the rind. An orange seed is called a pip. The white thread-like material attached to the inside of the peel is called the pith.

The sweet orange differ in size and colour according to the climate. It usually has ten segments known as carpels inside. The unripe fruit is green. The exterior of a ripe fruit varies from bright orange to yellow orange. The orange is acidic. It has a pH level ranging from 2.9 to 4.0.

Test Your Science

How is an orange able to conduct electricity?