what happens to the core of a star after the start of helium nuclear reactions in its core compared to what it was like before these reactions began?

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

helium

oxygen

neon

sodium