Chemistry as a Science

Chemistry is just another branch of science
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Questions #: 21
Time: 10 minutes
Pass Score: 80.0%
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The process of knowing about the natural universe through observation and experiment

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An educated guess about how the natural universe works

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A scientist can simply claim any hypothesis and start test it in the lab

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Is this an example of hypothesis?

if I mix one part of hydrogen with one part of oxygen, I can make a substance that contains both elements.

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Most good hypotheses are not grounded in previously understood knowledge and don't represent a testable extension of that knowledge.

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Observing an experiment

An experiment to test a hypothesis of mixing hydrogen and oxygen would be to actually mix both elements and see what happens. Most experiments include  of small, well-defined parts of the natural universe designed to see of the experiments.

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results
observations
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Why do we have to do experiments?

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A test of the natural universe to see if a guess (hypothesis) is correct

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Evidences from results of experiments are collected to establish a general principle of how the natural universe works, the evidence is summarized in a ______

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A general statement that explains a large number of observations

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A specific statement that is thought to be never violated by the entire natural universe

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All matter attract all other matter is called the ________ of gravitation

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Science is concerned only with the natural universe

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Anything that occurs around us, well, naturally is called _______ universe

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Stars, planets, humans, plants, and animals are all part of science

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English language is part of science

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Which of the following fields would be considered science?

  1. geology, the study of the earth
  2. ethics, the study of morality
  3. political science, the study of governance
  4. biology, the study of living organisms
  5. dynamics, the study of systems that change over time
  6. aesthetics, the concept of beauty
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science
not science
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Science can be either qualitative or quantitative

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A description of the quality of an object

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A description of a specific amount of something

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Identify each statement as either a qualitative description or a quantitative description

  1. Gold metal is yellow.
  2. A ream of paper has 500 sheets in it.
  3. The weather outside is snowy.
  4. The temperature outside is 24 degrees Fahrenheit.
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qualitative
quantitative
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sin cos tan
sin-1 cos-1 tan-1 π e
xy x3 x2 ex 10x
y√x 3√x √x ln log
( ) 1/x % n!
7 8 9 + MS
4 5 6 – M+
1 2 3 × M-
0 . EXP ÷ MR
± RND C = MC

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