Question 1(Multiple Choice Worth 3 points) (03.02 LC)
Which of the following is a characteristic of science?

It asks questions about the natural world.
It asks questions that cannot be tested.
It is done by only one scientist at a time.
It uses opinions to make conclusions.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass