What does the evidence supporting the Big Bang theory assume about the universe when it began? Select the two correct answers.(1 point)

Responses

It was contracting
It was contracting

It was extremely hot.
It was extremely hot.

It was very tiny.
It was very tiny.

It was composed of ice.

5 answers

It was extremely hot.
It was very tiny.
Which describes nuclear fusion?(1 point)
Responses

starts when a neutron slams into an atom, causing two atoms to form one, heavier atom
starts when a neutron slams into an atom, causing two atoms to form one, heavier atom

starts when two atoms slam together to form one, heavier atom
starts when two atoms slam together to form one, heavier atom

starts when two atoms slam together, causing the larger atom to split into two smaller atoms
starts when two atoms slam together, causing the larger atom to split into two smaller atoms

starts when a neutron slams into an atom, causing the larger atom to split into two smaller atoms
starts when a neutron slams into an atom, causing the larger atom to split into two smaller atoms
starts when two atoms slam together to form one, heavier atom
Which describes nuclear fission?(1 point)
Responses

starts when two atoms slam together to form one, heavier atom
starts when two atoms slam together to form one, heavier atom

starts when a neutron slams into an atom, causing two atoms to form one, heavier atom
starts when a neutron slams into an atom, causing two atoms to form one, heavier atom

starts when two atoms slam together, causing the larger atom to split into two smaller atoms
starts when two atoms slam together, causing the larger atom to split into two smaller atoms

starts when a neutron slams into an atom, causing the larger atom to split into two smaller atoms
starts when the larger atom splits into two smaller atoms after being struck by a neutron