P; set of measurement made of same quantity in the same way. A; closeness of measurement to true value. Think bullseye
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5
The number of protons in an atom represent its:
atomic number
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10
Explain the atomic theory
describes characteristics and internal structures of atom. History of atomic models.
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10
Name the main subatomic particles and their charges of an atom
electrons -, protons + and neutrons 0
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5
Why is recording the units of measure in an experiment important?
communicate accurate data like with a recipe, experiment could come out wrong. Keeps data reliable. Allows repeat testing. Assures unit conversions and accuracy
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5
What is the difference between an ionic and covalent bond?
i; electron given, C; electron is shared
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5
Give an example of a question or problem that can be tested through scientific investigation.
ex: How long does it take water to freeze?
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10
What is the difference between science and pseudoscience?
science uses method and follows testing,data and research. Pseudo science can look like science but not testable, based on belief.
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15
What is the scientific method and why is it important?
series of steps to investigate, five main steps, guide to conduct investigations, keep science reliable and valid.
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15
What is the difference between a theory and a law?
theory is set of ideas that attempts to explain why things happen, Law is observable phenomenon that holds true to all similar situations.
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5
Which forces are responsible for chemical bonding?
Electrostatic and nuclear strong force
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10
Compare a physical change to a chemical change
physical ;changes shape but not composition; chemical changes composition not reversible like ash