How does the field of science gain knowledge and understanding?

First to answer will be the brainliest i need the answer asap

Which statements best describe energy? check all that apply. the total amount of energy in the universe remains constant. the total amount of energy in the universe changes constantly. energy cannot be converted from one form to another. energy can be converted from one form to another. energy cannot be created or destroyed. energy can be created or destroyed.

What 2 properties are used to classify radiation