FORM 2 SCIENCE FOLIO (JUN JIAN)

The formation of star

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The Death Of Star

• All stars eventually run
out of their hydrogen gas
fuel and die. The way a
star dies depends on how
much matter it
contains—its mass. As
the hydrogen runs out, a
star with a similar mass
to our sun will expand
and become a red giant.

The Milky Way

• The Milky Way is a
barred spiral galaxy
around 13.6 billion
years old with large
pivoting arms
stretching out across
the cosmos.



The Descriptions Of Planets In Solar System
•There are eight planets in our solar system.
Mercury, Venus, Earth, and Mars are the four
inner celestial bodies, all of which are mostly
made up of rock. Jupiter, Saturn, Neptune,
and Uranus are the four outer planets, all of
which are massive planets made up mostly of
gases or ice.

The Differences of meteoroid,asteroid and comet

Meteoroids. are objects in space that range in
size from dust grains to small asteroids

Asteroid. A small rocky body orbiting the sun.
Large numbers of these, ranging enormously in
size, are found between the orbits of Mars and
Jupiter, though some have more eccentric orbits

Comet. a celestial object consisting of a
nucleus of ice and dust and, when near
the sun, a ‘tail’ of gas and dust particles

pointing away from the sun.