What is the purpose of having three separate branches of government and a system of checks and balances?

What event was one of the greatest factors that led to massive emigration from ireland to the united states in the mid—1800s

Abrief, "first-step" presentation of a work to be completed is called a

Kate is 14 years old and just started taking dance classes with her friends at a local dance studio. this is her first time in a dance program, so everything is new to her. her friends convinced her to join the class since they have been enjoying it for a few months. how could the following terms her succeed in the dance class? ● secondary reinforcement ● identity vs. role confusion ● observational learning how could the following terms hinder her success in the class? ● circadian rhythm ● basal ganglia ● vestibular sense