1. Baily's beads can be observed during a/an ?

occultation of Jupiter

partial solar eclipse

lunar eclipse

total solar eclipse

Answer: total solar eclipse


Baily's beads can be observed during a total solar eclipse The Baily's beads effect, or diamond ring effect, is a feature of total and annular solar eclipses.

2. The weight of an object on the moon is equal to ___ of its weight on the earth. ?





Answer: 1/6th


Mass of the moon is 1/100 times and radius of moon is 1/4 times that of the earth. Therefore, the gravitational attraction on the moon is about one sixth of that on the earth. Hence, the weight of an object on the moon is 1/6 th of the weight on the earth.

3. Which of the following statements about Ganymede is NOT correct ?

It is bigger than Mercury.

It is the largest natural satellite in our solar system.

It is the only moon known to have its own internally generated magnetic field.

It revolves around Saturn.

Answer: It revolves around Saturn


Ganymede orbits Jupiter at a distance of 1,070,400 km and completes a revolution every seven days and three hours.

4. Planetary scientists call the thin gaseous envelope around the Moon as the _____ ?

lunar exosphere

lunar stratosphere

lunar thermosphere

lunar endosphere

Answer: Lunar exosphere


The thin gaseous envelope around the Moon is called a lunar exosphere, bounded by the emptiness of space and the Moon’s surface , is an atmosphere so thin that atoms really collide.

5. Which of the following is the outermost solid part of the Earth ?





Answer: Crust


The structure of the Earth is divided into four major concentric layers: inner core, outer core, mantle and crust (the outermost layer). The crust is made up of tectonic plates, which are in constant motion.

6. The ____ is responsible for Earth's magnetic field ?

inner core


outer core


Answer: Outer core


The outer core is responsible for Earth’s magnetic field. On Earth, flowing of liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet.

7. The moon is an example of a ______ object ?





Answer: non-luminous


Moon is non-luminous. It shines by reflecting the sunlight falling on it.

8. The process that moves, elevates or builds up portions of the earth’s crust is called: ?





Answer: Diastrophism


Diastrophism is the process of deformation of Earth’s crust which involves folding and faulting. It is considered as a part of geotectonics. Denudation involves the processes that cause the wearing away of the Earth’s surface by moving water, by ice, by wind and by waves, leading to a reduction in elevation and in relief of landforms and of landscapes.

9. When are neap tides produced ?

When the sun and moon are at right angle to the earth.

When the sun partially contracts pull of the earth.

When the earth and moon are in a straight line.

When the sun lowers the gravitational pull of the moon.

Answer: When the sun and moon are at right angle to the earth.


A neap tide is a tide in which the difference between high and low tide is the least. Neap tides occur twice a month when the Sun and Moon are at right angles to the Earth. In this position, their total gravitational pull on the Earth’s water is weakened because it comes from two different directions.

10. How many natural satellites does the planet Venus have ?





Answer: 0


Venus has no natural satellites. Saturn has overtaken Jupiter as the planet with the most moons, according to US researchers. A team discovered a haul of 20 new moons orbiting the ringed planet, bringing its total to 82; Jupiter, by contrast, has 79 natural satellites.