Radioactive elements inside the planet release heat now, but why was so much more heat released earlier in
Earth's history that is released now?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

Sulfuric acid (a component of acid rain) reacts with limestone (calcium carbonate) to produce calcium sulfate and carbon dioxide. this damages buildings and statues made of limestone. which solution of sulfuric acid will damage these structures more quickly? a. 0.001% b. 0.005% c. 0.010% d. 0.015%

What are transitions between a liquid and gas called? identify which way they are transitioning