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The components of the solar system and their importance
The solar system is made up of several components. The main ones are the sun, planets, satellites, asteroids, meteors, comets, and inter-planetary dust and gases.
The sun is the main source of energy, which is called solar energy. The energy from the sun generates heat and light that are essential for living organisms. It is also responsible for the earth’s weather and climatic conditions.
Meteors are small solid objects from outer space. They are seen as bright light crossing the sky at night at a high speed.
At times, they fall to the earth surface and become meteorites which attract tourists. Examples include the Mbozi Meteorite In Songwe region in Tanzania and the Great Meteorite in Arizona, United States of America (USA).
The earth is the only planet known to support life. It has the necessary requirements such as water and air for animals and plants to survive.
The moon is a natural satellite which reflects the sun’s light to the earth during the night. The moon’s gravitational pull affects life on earth by creating tides in the oceans.
Asteroids are the source of meteorites, and therefore a source of surface deposits of metals such as iron and nickel.
The sun
The sun is at the centre of our solar system. It looks bigger because it is closer to the earth than other stars. The sun is larger than the earth. Its diameter is about 1.4 million kilometres and its mass is about 330,000 times greater than that of the earth. The sun is composed of about 75 percent hydrogen and 23 percent helium.
The remaining 2 percent consists of carbon, oxygen, silicon, iron and other chemical elements.
The sun is so hot that nearly all the molecules are broken into their separate atoms and all are mixed into a single hot gas. Its average surface temperature is about 6000 C. It is hotter in the interior where its temperature is about 15000000 C. The sun is the main source of all light and heat that the planets receive.
FORM SIX COMPETENCE EXAMINATIONS (FOSCE) -2024
GENERAL STUDIES
HISTORY
LANGUAGE
KISWAHILI
GEOGRAPHY
PHYSICS
CHEMISTRY
ECONOMICS
ACCOUNTANCY
COMMERCE
BIOLOGY
ADVANCED MATHEMATICS
BIOLOGY 3A THREE (3) HOURS ADVANCE INSTRUCTION
BIOLOGY 3B (3 HOURS INSTRUCTIONS)
BAM