What part of the brain does marijuana and alcohol affect in adolescents

The famous scientist galileo galilei did several experiments with sloping planes, which he rolled metal balls down so that he could study motion. by changing the slope, he could study how the speed at which the ball rolled was affected. what was the dependent variable in galileo's experiment?

Mary has spontaneously decided to prepare a meal for friends. she is beginning to prepare fin fish and realizes she wants to also prepare a hearty dish ready to serve at the same time. what should she prepare?

Isabel wants to sign up with the online social network teenbook, which she heard about from her friends at school. the teenbook site asked isabel for some personal information to complete her registration. in addition to her full name, teenbook asked for the name of her school, the city where she lives, her age, and her favorite foods. what is the only information that isabel should give to best ensure her safety?