Matter can neither be created nor destroyed but can be changed in form?

Answer 1

This is not strictly true, although it depends on your definition of 'destroyed'. Einstein's famous theory of general relativity shows the equivalence between mass and energy (mass being a property of matter). We do not tend to think of energy as matter.

We know that mass can be converted to energy and vice versa (in nuclear reactions both in nature and on earth). If mass is converted to energy, then some of the matter that produced that mass no longer exists as matter, but as energy. This is, strictly speaking, not destroyed, but it is no longer matter.

The first law of thermodynamics tells us that energy cannot be created or destroyed, and so we know that any mass that is converted to energy will always exist, even if no longer as matter.

Answer 2

yes, it's very true that matter neither be created nor be destroyed according to energy conservation law, but can be changed from one form to other.

Answer 3

The answer depends on your philosophical bent. If you are a Christian or a Jew, then you believe you have the answer. If you are neither then you believe you are getting close to an answer.

Answer 4

That's right. Energy can only be converted into other forms.

Although it seems odd, mass counts as another form, so matter to energy conversion (and vice versa) is possible.

Answer 5

The statement "Matter can neither be created nor destroyed but can be changed in form" is the substance of the law of conservation of matter.

Answer 6

The law of matter