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Module 1 DBA
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Name the four states of matter
Solid, liquid, gas, plasma
Compare a physical change to a chemical change
physical ;changes shape but not composition; chemical changes composition not reversible like ash
Give an example of conservation of energy and conservation of matter.
Any transfer of energy like stove to pot to heat soup, friction, sound in crash. transfer of matter from liquid to vapor; phase changes
Which forces are responsible for chemical bonding?
Electrostatic and nuclear strong force
What is the difference between an ionic and covalent bond?
i; electron given, C; electron is shared
The number of protons in an atom represent its:
atomic number
Name the main subatomic particles and their charges of an atom
electrons -, protons + and neutrons 0
Explain the atomic theory
describes characteristics and internal structures of atom. History of atomic models.
Compare precision to accuracy
P; set of measurement made of same quantity in the same way. A; closeness of measurement to true value. Think bullseye
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
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.
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.
Give an example of a question or problem that can be tested through scientific investigation.
ex: How long does it take water to freeze?
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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