Reach for the Stars 23-24

What is the process by which a star converts hydrogen into helium, releasing energy?

• Nuclear fission

• Nuclear fusion

• Gravitational collapse

• Electromagnetic radiation

Which phase of a star's life cycle precedes the main sequence phase?

• Protostar

• Red giant

• White dwarf

• Nebula

What is the closest star to Earth, other than the Sun?

• Alpha Centauri

• Proxima Centauri

• Sirius

• Betelgeuse

Which type of galaxy has a flattened, disk-like shape with spiral arms?

• Elliptical

• Irregular

• Spiral

• Quasar

What is the term for the explosion of a massive star at the end of its life cycle?

• Supernova

• Black hole formation

• White dwarf collapse

• Nebula formation

What is the primary component of a binary star system?

• Two stars orbiting each other

• A star orbiting a planet

• A star orbiting a black hole

• Two planets orbiting each other

Which planet in our solar system is known for its rings?

• Jupiter

• Saturn

• Uranus

• Neptune

What is the term for a star that has exhausted its nuclear fuel and collapsed to a very small size?

• White dwarf

• Red giant

• Neutron star

• Black hole

What is the approximate age of the universe?

• 4.5 billion years

• 13.8 billion years

• 1 billion years

• 100 billion years

Who proposed the heliocentric model of the solar system?

• Albert Einstein

• Isaac Newton

• Galileo Galilei

• Nicolaus Copernicus