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1) During a chemical change, the form of a substance is altered, but
not its identity.
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2) Dalton inferred that all atoms of an element are identical.
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3) Chemistry is the study of the properties of matter.
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4) A solid block that sinks in a container of water has a lower
density than water.
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5) Ice is an example of a liquid state of matter.
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6) If a graph is a straight line that passes through point (0,0), the
two variables are considered directly proportional.
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7) A change of state occurs when the thermal energy of a substance
increases or decreases by a sufficient amount.
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8) During boiling, only particles on the surface of the liquid gain
enough energy to become gas.
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9) The change from a solid to a liquid is condensation.
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10) Gas pressure is found by dividing the force of its outward push by
the area it pushes on.
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31) According to Charles's Law, when the temperature of a gas increases
in a flexible container, its _________ increases.
Answer:
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32) Gas particles that are not contained will always move from an area
of ___________pressure to an area of __________ pressure.
Answer:
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33) Matter in the ____________ state has a definite shape.
Answer:
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34) ________________occurs when the particles on the surface of a
solid are directly released as a gas.
Answer:
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35) The resistance of a liquid to flowing is called _____________.
Answer:
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36) A(n) ___________ is a group of atoms that are joined together and
act as a single unit.
Answer:
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37) An object's _____________ is its mass divided by its volume.
Answer:
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38) To find the volume of a rectangular solid, multiply _________ times
width times height.
Answer:
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39) A substance that cannot be broken down into any other substances by
chemical means is called a(n) _________________.
Answer:
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40) Usable amounts of metal can be removed from a rock called a(n)
_____________.
Answer:
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41) Suppose you bought a helium filled balloon on a cold winter day.
Predict what will happen when you take the ballon out of the store
and into the cold air. Explain your answer.
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42) Describe the arrangement and speed of particles in a solid
crystalline substance compared with those of particles in the same
substance in a liquid state.
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43) During long trips, the tires of a truck reach extremely high
temperatures. Explain why truck drivers are encouraged to monitor
and adjust the air pressure in their tires during long trips.
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44) State three of Dalton's ideas expressed in his atomic theory.
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45) Melting ice is a physical change. The burning of gas in a car
engine is a chemical change. Compare and contrast the two types of
changes.
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46) What is the International System of Units? Give an example of a
unit in this system.
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47) Explain why weight is NOT considered a constant measurement of the
amount of matter an object contains.
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48) Compare and contrast a compound and a mixture.
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49) Describe how electrolysis is used to separate a metal from its ore.
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50) A test tube contains 10 grams of each of the following liquids:
alcohol, water, corn syrup, and cooking oil. You know the density
of water is 1.00 g/cubic centimeter. Calclate the density of
alcohol if its volume is 12.7 cubic centimeters. Calculate the
density of the cooking oil if its volume is 10.8 cubic centimeters.
Calculate the density of the corn syrup if its volume is 7.25 cubic
centimeters. Starting at the bottom of the test tube, what is the
order of the liquids? Show your work and use correct units of
measurement.