Correct answer
A. Protons
Explanation
Protons is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
As comets get close to the sun, they start to “melt” and release gas and dust. This gas and dust forms what?
The snow on the mountains does NOT melt all at once when it is heated by the sun because:
Cooking gas is mixture of which two gases?
Atom is made up of____________different kinds of subatomic particles:
Sound waves are _________ waves.
A body can escape the gravitational pull of the earth if it is thrown up with a velocity of ________ miles/second ?