Need !
what is required to change water from a liquid to a gas?

(a)the addition of energy
(b)a change in the chemical composition
(c)a reduction of the volume of the sample
(d)a reduction of the mass of the sample

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

When curium-242 is bombarded with an alpha particle, two products are formed, one of which is a nudge on. what is the other product