Why is there a need to study the earths layers?

What are the properties of photosynthesis? Is bleach a good disinfectant? How many quats will go in 3 gallon? What are mixtures write its uses and explain it? What are people who save the earth called? What is Khamsin? What are halopytes? What is the larval food plant for papilio antimachus? How did communities of Aahkenazim differ from communities of Sephardim? The relationship between a shell and hermit crab? What is the function of vfd panel? Where do you dig for fossils on Animal Crossing? How the gravitational acceleration will change when you move from equator to north or south pole on the surface of earth? About 700 miles west of Lake Balkhash is this major body of water? When the intensity of contractions increases will the stimulus increase the intensity of contractons? Which structure contributes to pressure changes in the chest cavity? If atoms are mostly empty space why can't people walk through walls? What kind of phenotype ratio would you expect from a mono-hybrid cross? Why did Thompson choose a circle for his first model of the atom? What three parties must be satisfied with the completed electrical installation?