MELC 1.1 Physical Science

Which process is responsible for the formation of elements heavier than hydrogen in stars?

• Fusion

• Fission

• Radiation

• Combustion

The first element formed after the Big Bang was primarily:

• Helium

• Hydrogen

• Carbon

• Oxygen

What element is produced when two hydrogen atoms fuse together in a star?

• Oxygen

• Carbon

• Helium

• Nitrogen

What happens to massive stars after they exhaust their nuclear fuel?

• They become white dwarfs

• They explode as supernovae

• They become comets

• They turn into black holes only

Which process forms elements heavier than iron in a supernova explosion?

• Alpha decay

• Beta decay

• Neutron capture

• Electron emission

The Sun is currently in which stage of stellar evolution?

• Nebula

• Main sequence

• Red giant

Which element serves as the fuel during the main sequence stage of a star?

• Carbon

• Hydrogen

• Oxygen

• Iron

What is the final stage of a low-mass star like the Sun?

• Supernova

• Neutron star

• White dwarf

• Black hole

What stellar event is responsible for distributing heavy elements into space?

• Solar flare

• Supernova explosion

• Planet formation

• Cosmic ray collision

Which statement best explains stellar nucleosynthesis?

• It is the creation of new stars from nebulae

• It is the process of creating new elements inside stars

• It is the cooling of stars after fusion stops

• It is the splitting of heavy nuclei into lighter ones