You want to find another word for

You want to find out if "funny" is a noun, verb, or adjective. What source do you use?

You want to learn more about penguins. What source do you use?

Your cousin just moved to Alabama and you want to see how far it is from Virginia. What source do you use?

After reading, a student would like to do research on the Grand Canyon. Which reference material would be the BEST resource for him to use?