How is a year described?

What year did Kepler accomplish the Keplers laws? The ninety degree angle of solar rays are striking the tropic of cancer on what date? What is a product of the Krebs cycle glucose oxygen carbon dioxide or lactic acid? What is the combined diameter of Mars and its moons? When water boils what is in the bubbles? What two landforms dominate mesoamerica? Why would life be impossible without the electric force? What is the good thing about living in Chembakolli? What is the body covering of a salmon? What are particles of similar mass called neutrons and protonescontained within? Is it true that an introduced species can drive an invasive species to extinction? What age is imagination apparent? Which part of the flower is released into the air? What are the argon carbon dioxide carbon monoxide nitrogen and oxygen contents of Mars' atmosphere? What region is Coloma in? Is a marigold vascular? What type of landform is north and south combined? What is the difference in the calculated and rest mass of an atom of lithium? Why is the sclera so tough? Is your nose a fixed joint?