Dr. peterson does an experiment to research the growth rate of mice. he has two groups of mice. he feeds one group a type of food and adds chemical a, which is supposed to increase growth rate. the other group he feeds the same food without chemical a added. his research shows that chemical a increases growth rate by 30%. he does the experiment 4 times and comes up with the same result each time.

dr. peterson concludes that chemical a does increase the growth rate of mice. is dr. peterson's conclusion supported by scientific knowledge?

a.
no; scientific knowledge never comes from research or experiments.
b.
yes; any study that involves a percentage is based on scientific knowledge.
c.
yes; his conclusion is supported by evidence from his experiment.
d.
no; science cannot be used to research small animals such as mice.

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.

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy