What happens in the process of gravitational condensation? -An object decreases in size due to the collision of materials
-an object decreases in size due to the addition of materials
-gas particles are formed from solar nebula materials
-solid particles are formed from solar nebula materials

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen

Answerseafloor spreading;

The answer is false,  hope my answer is : )

The zhou dynasty (1046-256 bce) was the longest-lasting of china's dynasties. it followed the shang dynasty (c. 1600-1046 bce) and it finished when the army of the state of qin captured the city of chengzhou in 256 bce.