Name two characteristics that a thing must have to be called matter.

Compare and contrast physical changes with chemical changes.

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

How could a student test the effect of removing heat from a gas that is stored in a sealed container? what must occur in order for matter to change states?