Universe - Study Mode
[#116] The radiant energy of the sun is transmitted in the form of ________
Correct Answer
(A) Short waves
Explanation
Solution: Radiant energy is the energy of electromagnetic waves. It is a form of energy that can travel through space. For example, we receive the heat from the sun, which is located very far from the earth via radiation. The sun's heat is not transmitted through any solid medium, but through a vacuum. They are short waves.
[#117] "Sirius", the brightest star outside of the Solar System, is also called ________.
Correct Answer
(B) Dog star
Explanation
Solution: The brightest star in the sky is Sirius, also known as the “Dog Star” or, more officially, Alpha Canis Majoris, for its position in the constellation Canis Major. Sirius is a binary star dominated by a luminous main sequence star, Sirius A, with an apparent magnitude of -1.46.
[#118] Pole Star is always seen at one point in the sky whereas other stars are not
this is because ________
Correct Answer
(D) Pole star lies in the axis of spin of the earth
Explanation
Solution: Pole Star is always seen at one point in the sky whereas other stars are not
this is because Pole star lies in the axis of spin of the earth.
[#119] Which planet is known as the 'Watery Planet' ?
Correct Answer
(B) Earth
Explanation
Solution: If you look down at our planet from outer space, most of what you see is water
71% of the planet's surface is covered by ocean and it is because of this that the Earth is sometimes called "the water planet". Only about three-tenths of our globe is covered with land.
[#120] Which of the following is called "Blue Planet"?
Correct Answer
(B) Earth
Explanation
Solution: Planet Earth has been called the "Blue Planet" due to the abundant water on its surface. Here on Earth, we take liquid water for granted
after all, our bodies are mostly made of water. However, liquid water is a rare commodity in our solar system.