premise: water is a kind of substance sent2: if a substance absorbs solar energy then that substance will increase in temperature sent3: sun radiation is similar to solar energy sent4: water absorbs solar energy in the water cycle sent5: water is in the gas state , called water vapor sent6: temperature is a measure of heat energy sent7: evaporation means a substance changes from a liquid into a gas by increasing heat energy.
hypothesis: a neutron is a particle that is neutral in electric charge and has one atomic mass unit