How has the north American plate changed overtime?

What is the national average of primary care visits per hour per physican? What kind of chemical compound does salt and water form? How do you say Spirits in Kenyan? Yeasts can produce ATP by either fermentation or chemiosmosis thus they are? How big a wire do you need for 6 amps? Should you Run a 20amp circuit 150 feet with? What is the approximate density of a piece of aluminum if its mass is 13.5 g and volume 100cm? What landmark theory is the foundation for our understanding of the structure of matter? How many cm in 10 yards? What are bastions used for? What energy is removed from the substances as it changes state'? Was the nuclear model widely accepted? What does eccentricity mean to an astronomer? How do you detect presence of hydrocarbons? List the factors and human activities disturbing the biodiversity un knowingly? An atom has an atomic number of 7 an atomic mass of 14 how many neutrons would it have? What is the coldest weather ever recorded in Saskatoon? What perion came before the carboniferous period? What happens when a steroid hormonoe binds to a receptor? Is a sea snail a carnivore omnivore or a herbivore?