Stars

• Science
• Lower Secondary (Key Stage 3)

 Other Evidence of the Big Bang and

Life Cycle of a Star

What is the 'big bang'?

What are 2 pieces of evidence for the big bang?

Name the first stage of the life cycle of a star

1. White dwarf
2. Red giant
3. Protostar
4. Stellar Nebulae

Is our sun average or large star?

1. Average
2. Large star

Which life cycle stage happens after a red supergiant?

1. Black hole
2. Supernova
3. Neutron star
4. Planetary nebulae

How old do we think the Universe is?

1. 4.5 billion years
2. 13 - 14 million years
3. 13 - 14 billion years
4. 4.5 million years

What is the last stage of an average stars life cycle?

1. Black hole
2. Neutron star
3. White dwarf
4. Black dwarf

main sequence star

White dwarf

Red giant

Nebula

Put these into the correct order for a star like our sun

What stage is our Sun in at the moment?

1. Red giant
2. Red super giant
3. Planetary nebula
4. Supernova

Stars release energy through a process called nuclear fusion.
Which sentence correctly describes the nuclear fusion processes in stars like the Sun?

1. Hydrogen nuclei are fused together with helium nuclei
2. Helium nuclei split up to form hydrogen nuclei
3. Hydrogen nuclei are fused together to form helium nuclei
4. Helium nuclei are fused together to form hydrogen nuclei

What will happen to low mass stars like the Sun, when all the hydrogen has been used up in fusion processes?

1. The star becomes a black hole
2. The star expands to become a red giant
3. The star explodes as a supernova
4. The star contracts to become a white dwarf

Stars are formed in massive clouds of dust and gas, composed mostly of hydrogen.
What is the name of this type of cloud?

1. A protostar
2. A Supernova
3. A black hole
4. A nebula

A police car has its siren on, and is travelling towards you. You listen to the sound. What do you notice?

1. It sounds higher pitched
2. It sounds lower pitched
3. There is no change in pitch