Page 101 - SST Class 06

Quiz Time friction with the atmosphere, they start burning

Write True and False : and disappear as dust and gas called meteors or
1. The Earth is a true sphere. __________ shooting stars . Sometimes, a meteor is not
2. The Sun is the largest member of the Solar completely burnt and it strikes the Earth's surface
System. __________ and forms a crater. This piece is called a
3. The Moon is not a natural satellite of the Earth. meteorite .
__________
Info Bits
4. All planets are spherical in shape and revolve Info Bits
around the Sun. __________
5. We cannot see the Moon on the New Moon We can see a meteorite crater in Arizona state in
night. __________ the USA.

Comets
Asteroids
The comets too revolve round the Sun, but their
Asteroids are small planet-like bodies which orbit is very elongated. A comet is a huge lump of
revolve round the Sun, chiefly found between the
snow and rocky dust.
orbits of the Jupiter and the Mars. They are
When it reaches near the
believed to be the pieces of some planet which Sun, it starts to glow and
exploded soon after its birth. The largest asteroid
develops a long shining
is the Ceres. tail. The most famous

Meteors and Meteorites comet is the Halley’s
Comet which appears
Meteoroids are small pieces of solid mass, which
every 76 years. It was last
revolve round the Sun. Sometimes, they enter the
seen in 1986, so it will be Halley’s Comet
Earth’s atmosphere at a great speed. Due to
spotted in 2062 next.

v The universe is infinite and comprises all galaxies formed by millions of stars, planets and other celestial
bodies.
v Distance in the space is measured by light years.
v The Milky Way is our parent galaxy in which our Solar System is located.
v A constellation is a group of stars in a particular shape.

v The Solar System comprises of the Sun, its eight planets and their satellites.
v Our Earth is a unique planet because it can originate and support life.
v Asteroids, meteors and comets are small bodies in revolve round the Sun.

A. Tick (3) the right option :
1. ______________ is a group of stars arranged in a particular shape.
(a) planet (b) constellation (c) satellite

2. The Pole Star always shines in the ______________ direction.
(a) South (b) North (c) West
Exploring The Solar System
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