Final answer:
A standard high school baseball game consists of seven innings, with the possibility of extra innings if the game is tied, or fewer innings if conditions such as weather or the mercy rule apply.
Step-by-step explanation:
The standard number of innings played in one high school baseball game is seven innings. If the game is tied after seven innings, additional innings may be played to determine a winner, similar to an overtime period in other sports. However, due to certain conditions such as weather or darkness, sometimes games may be shortened or games may end with a mercy rule if one team has a large lead over the other. For example, a game may be called after 5 innings if one team is ahead by 10 or more runs. It's also important to know that high school baseball rules can vary by state and governing body.