Transcript 4769-L1 Life cycle mind map completex

Instructions
1. Print onto A3
2. Use with mid  high ability pupils
3. Best used to summarise information which has
been extracted from text books or the internet
4. Could also be used for revision
THE LIFE CYCLE OF STARS
BIRTH
DEATH
PROTOSTAR
What has
started?
Bigger mass star
“Massive Star”
What elements are
being made?
What is it made
from?
RED
SUPERGIANT
SUPERNOVA
Why has fusion
continued, when
does it stop?
The elements are spread
across space leaving a core
Mass of the core 4x The Sun
Main Sequence
What elements are made?
Why does a star leave
the main sequence?
NEUTRON
STAR
What role does
gravity play in the
birth of the star?
What
elements are
being made?
BLACK HOLE
Is there any fusion?
What happens to the
star?
RED
GIANT
PLANETARY NEBULA
Why does the star
now begin to die?
WHITE DWARF
What has happened to the
temperature and size?
THE LIFE CYCLE OF STARS
BIRTH
DEATH
MAIN SEQUENCE
What is it
made from?
Protostars are
made from
clouds of
Hydrogen and
Helium gas
What role
does gravity
play in the
birth of the
star?
Gravity causes
the star to
attract more
gas and dust
until the core
becomes hot
and dense
enough for
fusion to begin
Nuclear
fusion has
started
fusing
hydrogen
into helium
RED
SUPERGIANT
These have enough
mass for fusion to
continue after the
Helium runs out. When
most of the core has
become iron the star
explodes in a…
What elements are
being made?
Smaller mass star “Average Star” e.g.Sun
PROTOSTAR
What has begun?
Bigger mass star
“Massive Star”
RED
GIANT
In Red Giants and Red
Supergiants Helium
fuses into Beryllium,
and Carbon, which
makes heavier
elements such as
Nitrogen and Oxygen
Why does a star leave
this sequence?
When the star runs out
of Hydrogen it leaves
the main sequence
stage
Why does the star now
begin to die?
When all the Helium has
run out the star lacks
enough mass to continue
fusion, the outer layers
are ejected in a shell of
material called a…
SUPERNOVA
What elements are
being made?
The elements are spread across
space leaving a core
What elements are
being made?
Heavy elements e.g.
Gold, Uranium and
Lead
Mass of the core 1.44x The Sun
NEUTRON
STAR
BLACK HOLE
Mass of the core 4x
The Sun
PLANETARY NEBULA
WHITE DWARF
What has happened to the
temperature and size?
The star has cooled and
shrunk
In a White Dwarf there
is no fusion so the star
cools and fades