GK
SOLAR SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
a moon
|
|
|
a planet
|
|
|
a star called the Sun
|
|
|
a comet
|
Detailed explanation-1: -The heat source for our planet is the sun. Energy from the sun is transferred through space and through the earth’s atmosphere to the earth’s surface. Since this energy warms the earth’s surface and atmosphere, some of it is or becomes heat energy.
Detailed explanation-2: -Solar energy is created by nuclear fusion that takes place in the sun. Fusion occurs when protons of hydrogen atoms violently collide in the sun’s core and fuse to create a helium atom. This process, known as a PP (proton-proton) chain reaction, emits an enormous amount of energy.
Detailed explanation-3: -The Sun is Earth’s primary source of energy.
Detailed explanation-4: -Stars are self-gravitating celestial bodies that emit their own light, whose energy source comes from the nuclear fusion of hydrogen into helium and, later, into heavier elements.