8th grade key concepts
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 1. Describe the three types of scientific models. | • Conceptual models are systems of ideas
or analogies to explain an idea.
• Mathematical models use equations and
data to explain an idea.
• Physical models use tangible (touchable)
items to visually represent an idea.
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| 2. Distinguish between a theory and a law. | • A theory is an explanation that ties
together many hypothesis and
observations, while a law is when that
explanation is proven to be true.
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| 3. Define hypothesis. | • A hypothesis is an
explanation that is
based on prior
scientific research or
observations and that
can be tested.
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| 4. Define mathematical mean. | • The average of all the numbers in a data
set.
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| 5. Define mathematical median. | • The middle number of a data set, when
the numbers are arranged in order. If
there are two middle numbers, the median
is the average of the two.
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