Which question could be answered using the process of scientific inquiry
Why do tuna exist?
What food do tuna like to eat?
When will all of the tuna be gone from the ocean?
How has the average size of tuna changed from year to year?

Over the last 90 years, scientists have added to the body of evidence supporting the big bang theory. what is the latest piece of evidence discovered in 2014?

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?

What metric units would you use to measure the thickness of a key