"B.) profound social and economic changes occurred" because when the industrial revolution happened a lot of how we make stuff was changed, by factories, and because of this new jobs where created. This gave people money and thus social and economic changes happened.
Answer: energy can be cycled in two directions
Explanation: The arrows show the direction of matter and energy flow and should be two
The answer is: the amount of the saliva samples must stay consistent while the amount of starch must vary.
The amount of the saliva samples must stay consistent because amylase, present in the saliva, is the independent variable which affects the dependent variable - the amount of starch. So, amylase will do its job while remaining surface area of the starch will depend on the starting amount of the starch.
Related Colors are adjacent to each other on the color wheel.
