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Download bYTEBoss lesson 3 life of star
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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.