You most probably have a conifer or evergreen that is either a spruce, fir, or hemlock. Let's continue...
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Does your tree have pointed needles that are often 4-sided or diamond shaped in cross section, are attached to the twig with wooden pegs (sterigmata) and are whorled around the branch? Adult tree shape is normally narrowly conical. If so you probably have a spruce!
Does your tree have needles that are are attached to the twig with suction cups (no pegs or stalks) and two-ranked along the branch? If so you probably have a fir!