Which of the following is the closest to the scientific fact A. A hypothesis
B. A theory
C. An opinion
D. A prediction

Can someone explain to me how to do this problem ?

If a substance is in the gas phase, which of qualities of the gas will stay constant? a: volume b: mass c: shape d: position of particles

Which magnetic property best describes a magnet’s ability to act at a distance? magnets are dipolar. magnets attract only certain objects. magnets have magnetic fields. magnets can transfer their properties to certain materials.