Scientists create models to help make sense of the natural world. Models are powerful tools that help scientists predict how things work. Models should be scientifically testable. When a model fails to predict correctly, the model must be revised or
replaced.
Which of these would be the BEST example of a model that could be used represent an animal or plant cell as a drawing to
illustrate the parts of the cell?
A)
computer model
B)
mental image model
C)
two dimensional model
D)
three dimensional model

answer; /// i believe the name is ( check first good luck.hope this

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.

garbage disposal because lysosomes dispose of old cell parts like garbage disposals dispose of old food.