The core is the layer of the sun from which energy escapes into space.
A solution is uniform throughout, so your answer is the first one.
Iron fillings can be separated as they are magnetic. Use a magnet to separate the iron fillings away.
Salt can be separated away as they are soluble in water.
The best answer from the choices given is option B. The solubility of the liquid will increase. An increase in the temperature is associated in the increase of solubility because kinetic energy of the particles increase leading to more effective breaking apart of attractions between particles.
All you haft to do is mutiply and see how many points there are
