The temperature at which a material changes from a solid to a liquid is called the

V1t2 = v2t1 is an expression of who’s law

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Three alkali metals in group 1 are a. calcium, strontium, barium b. boron, aluminum, gallium c. sodium, potassium, rubidium d. fluorine, iodine, chlorine