Processes of the Early Universe

What was created during the Big Bang?

• atoms

• matter

• energy

• neutrons

Which ones are subatomic particles?

• molecule

• neutron

• proton

• ion

What is the hydrogen atom made of?

• electron

• proton

• neutron

• meson

How did the first galaxies form?

• by gravity contracting matter

• by hydrogen fusion

• by supernova explosions

• by volcanic eruptions

When do we say a star is born?

• when it contracts

• when it has planets

• when it starts shining

• when hydrogen fusion starts

What is the largest element that can form in regular stars?

• hydrogen

• helium

• iron

• oxygen

How can heavy elements be created?

• by hydrogen fusion

• by nuclear fission

• by supernova explosions

• by gravitation

What percentage of the material of the Solar System makes up the planets?

• 98%

• 2%

• 24%

• 15%

Which element is the basic building block of all other ones?

• proton

• helium

• hydrogen

• neutron

What is hydrogen fusion?

• two hydrogens forming a helium

• a neutron couples up with a proton

• contracting matter heats up

• dust fusing into a star