ED Science

There are many uses or artificial satellites. In communication field, they are used for telecommunication, TV transmitter, radio networks, and internet. In educational field, they are used for teleconferencing and nationwide classrooms. In weather forecasting, artificial satellites are used to get reports about monsoon, cyclones, changes of climate, etc. In oceanography, they are used to […]

Artificial satellites orbits in either Equatorial or Artificial or Polar orbits. Equatorial orbit is the orbit being parallel to the equator. In equatorial orbits, satellites do not need energy for revolutions.  To make a satellite appearing stationary in space when viewed from the Earth, or called Geostationary, a satellite should be placed at about 35,786 […]

Any human-built objects that move orbiting the Earth and other planets in Solar System are called artificial satellite. They are not natural satellites, or what we called moons, that move naturally orbiting planets, dwarf planets, or asteroids. Artificial satellites are built in many purposes; studying Earth and other planets, studying universe, or communicative satellites. Some […]

The classification of chromosomes is based on the centromere position, which falls into four types; 1-     Metacentric 2-     Sub-metacentric 3-     Acrocentric 4-     Telocentric.

An organized DNA structure and protein found in cells. A piece of coiled DNA with many genes in it, along with other nucleotide sequences and regulatory elements is called a chromosome. DNA-bound proteins that package the DNA and control the functions are also contained by chromosomes.

Sex determination is a process that determines the sex of the developing embryo. An additional unpaired chromosome was observed in the male during a study on grasshoppers. ‘X-body,’ that is what the additional chromosome is called. It is so associated with sex determination that it is known as sex chromosome. The other sex chromosome can […]

According to Mendel, there is a pair of factors for the regulation of every character in an organism. Concept of chromosomes and DNA has not been discovered during Mendel’s time. That a gene is a part of chromosome was later proven by T. Boveri and W.S. Sutton. Therefore, heredity from parental generation to offspring is […]

Heredity is transmission of traits from parents to their offsprings. The heredity information is carried by zygote or fertilized egg, which develops only into certain type of offspring. Therefore, only sparrows are hatched from eggs laid by sparrow, and only puppies born by a dog.

A big cluster of space where stars are found is called galaxy. 1011 galaxy are spread in the universe, each of it contains about 1011 stars. So, it total, there are about 1022 stars in the universe. Generally, galaxies are shaped either spiral or elliptical. Spiral galaxies are more in number than elliptical galaxies. However, […]

‘Cloud of Urt’ is a cluster of so many celestial objects further than Pluto in our solar system. Revolving around sun in an orbit of ellipse, these objects are then called Comets, which are formed from icy rocks and dust.