This term at MPPS the year 3/4s wrote explantations. They needed to come up with a question and write about it these explantations needed to have features such as: cause and effect, tier 3 words, authors purpose needs to be to teach, and it needs to have a impersonal and serious voice these are some of the features. Heres my explantation on the lifecycle of stars.
Explanation: The lifecycle of stars
Have you ever been gazing up at the stars on a quiet night and asked yourself, “Whether they would stay there forever?” Stars are always above us in space and their life cycle is very different compared to ours. It even uses other stars that explode!
The lifecycle of a star starts with a nebula. A nebula is a cloud of hydrogen, helium and cosmic dust. Nebula is also the Latin word for cloud. When a nebula is affected by an explosion it breaks into smaller swirling clouds. At the centre of these clouds is a protostar. A protostar hasn’t developed its surface properly and doesn’t emit light and heat in the same way. The protostar will get hotter the protostar does this to develop and burn its hydrogen so it can survive and eventually it ignites and a new star is born!
The nebula leads to smaller swirling clouds and the protostars and the new star is made
After the star is born it will continue to burn hydrogen for several billions of years the smaller the star the longer it live. As it burns it gets bigger until it gets so big it turns into a red giant. Red giants are enormous and have a huge surface area. They’re mostly made up of gas, and as the name suggests they’re bright red.
When an Explosion affects a red giant the force blows off a layer of its gas which makes nebulas this process continues. Then the red giant turns into a smaller planetary nebula, this is a smaller star enveloped in gas.
Stars burn hydrogen and then turn into red giants that lose gas to become planetary nebulas
Once the planetary nebula loses most of its gas it turns a bright white and is very small and dwarfish. This stage in the life cycle is called a white dwarf the white dwarf will continue to burn its hydrogen until it runs out.
After a star loses all its hydrogen it will explode! Effecting heaps of stars across the solar system. This explosion is called a supernova and it can last several days. It also has multiple types such as the pulsar which consists of several flashes because it has two poles of light with a blue core we see it as it rotates so it’s not actually flashing but your eyes will see this. This is similar to something called the munker white illusion if you type that into your search engine you and click on images you can see an illusion of colours this is similar to what we see as the pulsar rotates.
Different types of supernovas
Soon after a supernova dies down the star usually dies and is gone. But heavy’s stars shrink until they’re no bigger than a grain of sand instead of dying. But it still has a gravitational pull its gravity is so strong it has the ability to suck in light from a few kilometres away! This is the last stage in the life of a star and this does not happen to all stars it’s called a black hole. Eventually the black holes mass gets so big and it will collapse on itself and die. Then the life cycle continues…
A summary of the life cycle of a star