Stars And The Solar System(8th Grade > Physics ) Questions and Answers
Explanation:-
Answer: Option B. -> grows in size:
B
The day on which no region of the moon is visible is called as a new moon day. The next day, only a small portion of the moon is visible in the sky. This is known as the crescent moon. Thereafter, every night the size of the visible part of the moon grows larger.
Explanation:-
Answer: Option B. -> Asteroids:
B
There is large space between the orbits of the planets Mars and Jupiter. A large number of small objects occupy this space revolving around the Sun. These objects are calledasteroids. The collection of asteroids in that region is called the asteroid belt.
Explanation:-
Answer: Option B. -> Neptune:
B
The area enclosed by an orbit depends on the distance of the planet from the sun. Larger the distance, larger the area enclosed. Among the given planets, Neptune is the farthest planet so will have the maximum area enclosed in its orbit.
Explanation:-
Answer: Option A. -> astronomy:
A
The study of celestial objects such as stars, planets, comets, galaxies and associated phenomena is called astronomy. It applies mathematics, physics, and chemistry in an effort to understand and thus explain the origin of these objects and their evolution, by understanding the underlying phenomena or principles.
Explanation:-
Answer: Option A. -> IAU:
A
In 2006, the International Astronomical Union (IAU) adopted a new definition of a planet such that Pluto doesnot fit this definition. Hence,it is no longer a planet of the solar system.
Explanation:-
Answer: Option C. -> 4:
C
The Earth's completion of one revolution around the Sun requires one year. There are four full years between 1 January 2001 and 1 January 2005. The Earth has therefore completed four revolutions around the Sun.
Explanation:-
Answer: Option D. -> It is the distance which light travels in one year:
D
A light year is defined as the distance traveled by light in oneyear. For example ifa star is4 light years away from earth, it means that light from that starwill take 4 yearsto reachEarth.