Mid-Term Review 8th Grade Physical Science 3: Question Preview (ID: 23537)


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Which of these materials is a heterogeneous mixture?
a) air b) sea-water c) sand d) steel
Which of these materials is not malleable?
a) Copper b) Aluminum c) Glass d) Gold
In a balanced chemical equation, the number of atoms on both sides of the equation __________.
a) are exactly the same. b) varies by how much of each material is used. c) is different because the compounds created are different. d) has no relationship to each other.
True or False: All scientific experiments follow exactly the same steps of the scientific method.
a) True b) False c) N/A d) N/A
When scientists use placebos on one group and test drugs on another, the placebo group is the
a) dependent variable b) independent variable c) control d) hypothesis
How many milliliters in a liter?
a) .001 b) 100 c) 1,000,000 d) 1000
When two different elements chemically bond, they are referred to as a(n)
a) isotope b) double element c) ion d) compound
In a chemical reaction,
a) new matter is created. b) it is possible to end up with more matter than before. c) it is possible to end up with less matter than before. d) matter is neither created nor destroyed.
The periodic table is arranged in order by
a) atomic mass b) atomic number c) alphabetically d) size of the atom
The Noble Gases tend be much more ______________ than other elements in the Periodic Table.
a) massive b) reactive c) stable d) rare
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