CK-12: Introduction to Chemistry

Which of the following is not a part of the macroscopic world?

• Leaves

• Rusting iron

• Bacteria

• Rain

What was the philosopher’s stone?

• a material that protected the body

• a rock that Aristotle sat on while he taught

• a material used to refine ores

• a substance that could change lead into gold

Which of the following would not be considered applied chemistry?

• study of the atomic structure of rubidium

• use of rubidium in jewelry

• treatment of disease using rubidium solutions

• research on how to dissolve rubidium

Which of the following statements about fossil fuels is incorrect?

• coal, petroleum, and natural gas are fossil fuels

• they are a nonrenewable energy source

• the global supply of fossil fuels will never be used up

• fossil fuels supply most of our energy needs today

The dependent variable

• does not change as the temperature increases

• will change as the independent variable changes

• never changes

• is varied in the experiment to see how it influences the results

The independent variable

• does not change as the temperature increases

• will change as the dependent variable changes

• never changes

• is varied in the experiment to see how it influences the results

What is Alchemy?

• Precursor to chemistry

• Precursor to biology

• Precursor to physics

• Precursor to astronomy

What was the reputation of Alchemists?

• People thought they were incredible scientists

• People thought they were kind

• People thought they were crazy

• People thought they were innovators

The two main goals of alchemy were

• immortality

• to advance science

• to create gold from base metals

• to create chemistry

• to create living organisms

When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?

• Dependent
• Independent
• Control
• Compound