Transcript bYTEBoss lesson 3 life of star

Unit 11 – Science and Humanity
Sept
Title: Find out the stages involved in the
life cycle of a star
•
Prior learning
– Our sun is a star
•
Key words
– Sun, Star, black dwarf, white dwarf, red giant, supernova, nebulae, dust,
hydrogen, helium
Unit 11 – Science and Humanity
Describe long-term changes that have occurred in our universe
to our solar system and earth
By the end of this lesson
we should be able to:
Success Criteria:
• Know the gaseous
components of the sun (C)
• I have stated that the
sun is made from
hydrogen gas
• Describe the life cycle of
a star in simple terms.(C)
• I have described in simple
terms the stages involved
in a stars life
• Explain in detail the life
cycle of a star(C/B)
• I have explained in more
detail the stages involved
in a stars life and stated
possible outcomes.
Unit 11 – Science and Humanity
Starter
• Can you name any patterns of stars
(constellations)??
Unit 11 – Science and Humanity
Unit 11 – Science and Humanity
The end of the life cycle of really massive stars is
different to that of massive stars.
After a really massive red giant collapses in a supernova
explosion, it leaves a star so dense that not even light
can escape its gravitational pull. This is called a black
hole!
Some scientists believe
that there are black
holes at the centre of
galaxies.
If light cannot escape a
black hole, then how can
a black hole be
observed?
Unit 11 – Science and Humanity
Use these words below to complete the life cycles of
different stars:
small
nebula
white
dwarf
star larger
than our Sun
red giant
large
nebula
nebula
massive
red giant
neutron
star
star like
our Sun
supernova
Comparing the life cycles of stars
small
nebula
nebula
large
nebula
star like
our Sun
star larger
than our Sun
red giant
massive
red giant
white
dwarf
supernova
neutron
star
Unit 11 – Science and Humanity
Unit 11 – Science and Humanity
Unit 11 – Science and Humanity
Plenary: What is the correct order for these sentences about
how a star is formed?
This causes the
‘nebula’ to collapse.
Gravity causes a dust and
gas cloud to condense
into a smaller volume.
As the nebula collapses,
temperatures and pressures
inside the nebula increase.
Birth of a star
When the temperature and
pressure are great enough
nuclear fusion starts.
Eventually gravity and
the outward pressure
of escaping energy is
balanced. At this stage,
it is called a star.
Unit 11 – Science and Humanity
Describe long-term changes that have occurred in our universe
to our solar system and earth
By the end of this lesson
we should be able to:
Success Criteria:
• Know the gaseous
components of the sun (C)
• I have stated that the
sun is made from
hydrogen gas
• Describe the life cycle of
a star in simple terms.(C)
• I have described in simple
terms the stages involved
in a stars life
• Explain in detail the life
cycle of a star(C/B)
• I have explained in more
detail the stages involved
in a stars life and stated
possible outcomes.