A sample of a substance was heated strongly in a crucible, and the sample increased in mass. This is evidence that
A. a gas had been evolved.
B. the substance had melted.
C. the substance had sublimed.
D. a chemical change had taken place.
O E. a change of state had occurred.

maybe the spark is gone, love is a weird emotion and there is a possibility he may have found somebody else.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

the earth would become to overheated and everything alive on it will eventually die from overheating. plants will eventually die as well, water will evaporate, and it will be nothing but a hot planet without anything living on it.