Help please my teacher didnt help

answer: because they get bored or smth idk

a. theta waves. this is because the person is in a light sleep which means the brain waves would show these kind of waves.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

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