Early scientists performed experiments regarding mass and products for many years, but had difficulty demonstrating that mass was
conserved. This changed when they conducted these experiments
under specific conditions. What condition was this? Refer to
Paragraph 4.

Which statement about the stamps is correct?

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.