KS3 Physics: Understanding the Sun and Stars

What type of star is the Sun?

• Yellow dwarf

• Red giant

• Blue supergiant

• White dwarf

What are the primary elements that make up the Sun?

• Helium and Nitrogen

• Oxygen and Carbon

• Hydrogen and Helium

• Carbon and Hydrogen

What process releases energy in the Sun?

• Photosynthesis

• Nuclear fusion

• Electrolysis

• Combustion

What will the Sun eventually become when it runs out of hydrogen?

• Black dwarf

• Supernova

• Red giant

• Black hole

How many stars are estimated to be in the Milky Way?

• About 1 trillion

• About 10 billion

• About 100 billion

• About 100 million

What is a stellar nursery?

• A type of star

• A nebula where stars are formed

• A black hole

• A galaxy

What is the main sequence stage of a star?

• A transition phase

• The end of a star's life

• The most stable phase

• The beginning of a star's life

What happens to a high mass star at the end of its life?

• It becomes a white dwarf

• It turns into a black dwarf

• It may explode as a supernova

• It fades into a red giant

What is the estimated number of galaxies covered when holding your thumb up to the night sky?

• About 100 million

• About 1 billion

• About 10 million

• About 1 million

What is the Milky Way?

• A galaxy

• A star cluster

• A nebula

• A constellation