Transcript of Physical Science Take 10 Week #15 SPS-4 Periodic Table & SFS- 5 States of Matter.
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Physical Science Take 10 Week #15 SPS-4 Periodic Table &
SFS- 5 States of Matter
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Day 1 Question 1 Which of the following changes of state will
increase the entropy of water molecules?
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Day 1 Question 2 Which of the following statements explains
what happens to the gas inside a balloon as the external pressure
on the balloon decreases and the temperature stays constant? A. The
volume increases. B. The volume decreases. C. The molecular speed
increases. D. The molecular speed decreases.
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Day 1 Answers 1.Which of the following changes of state will
increase the entropy of water molecules? Which of the following
statements explains what happens to the gas inside a balloon as the
external pressure on the balloon decreases and the temperature
stays constant? A. The volume increases.
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Day 2 Question 1 Formaldehyde in solution is used as a
preservative. It has a melting point of -92C. When the temperature
of a sample of formaldehyde rises from -93C to -91C, which of the
following occurs? A. The molecules move more freely. B. The
molecules lose electrical charge. C. The molecules break apart into
atoms. D. The molecules become fixed in a crystal structure.
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Day 2 Question 2 A hiker carries drinking water in a
cloth-covered, metal container called a canteen. During the summer,
the hiker wets the cloth covering so that the water in the canteen
stays cool. Which of the following statements explains why a wet
covering keeps the water cool? A. A wet covering transfers coolness
to the water in the canteen. B. A wet covering insulates the
canteen better than a dry covering. C. Evaporation of water from
the covering transfers heat away from the canteen. D. Condensation
of water from the covering transfers heat away from the
canteen.
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Day 2 Answers 1. Formaldehyde in solution is used as a
preservative. It has a melting point of -92C. When the temperature
of a sample of formaldehyde rises from -93C to -91C, which of the
following occurs? A.The molecules move more freely. 2. A hiker
carries drinking water in a cloth-covered, metal container called a
canteen. During the summer, the hiker wets the cloth covering so
that the water in the canteen stays cool. Which of the following
statements explains why a wet covering keeps the water cool? C.
Evaporation of water from the covering transfers heat away from the
canteen.
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Day 3 Question 1 The diagram below shows two gases maintained
at STP in separate chambers by a closed valve. After the valve is
opened, the two gases form a homogeneous mixture. Which of the
following changes in the system results when forming this mixture?
A. loss of heat B. increase in entropy C. chemical reaction of the
gases D. decrease in the total volume of the gases
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Day 3 Question 2 Which of the following statements best
explains why water vapor condenses as temperature decreases? A.
Collisions between water vapor molecules become elastic. B. Water
vapor molecules chemically react when they collide. C. Water vapor
molecules are pulled together by the force of gravity. D.
Attractive forces between water vapor molecules overcome molecular
motion.
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Day 3 Answers 1. After the valve is opened, the two gases form
a homogeneous mixture. Which of the following changes in the system
results when forming this mixture? B. increase in entropy 2. Which
of the following statements best explains why water vapor condenses
as temperature decreases? D. Attractive forces between water vapor
molecules overcome molecular motion.
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Day 4 Question 1 The figure shows part of the periodic table.
Which of the following is an accurate comparison of the atomic
number and mass of copper (Cu) and gold (Au)? A. Au has a smaller
atomic mass and fewer electrons than Cu. B. Au has the same atomic
mass as Cu but a greater atomic number. C. Au has the same atomic
number as Cu but a much greater atomic mass. D. Au has both a
greater atomic number and a greater atomic mass than Cu.
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Day 4 Question 2 Which of the following correctly describes a
trend from top to bottom in the group 2 (2A) elements on the
periodic table? A.Ionic radius decreases. B.Ionic charge increases.
C. Atomic radius increases. D. Atomic number decreases.
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Day 4 Answers 1. Which of the following is an accurate
comparison of the atomic number and mass of copper (Cu) and gold
(Au)? D. Au has both a greater atomic number and a greater atomic
mass than Cu. 2. Which of the following correctly describes a trend
from top to bottom in the group 2 (2A) elements on the periodic
table? C. Atomic radius increases.
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Day 5 Question 1 Which of the following choices is the best
label for the y-axis? A. molecular density C. neutron density B.
molecular motion D. neutron motion The graph compares three states
of a substance.
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Day 5 Question 2 The illustration shows a hot-air balloon. The
pilot can change the altitude of the hot-air balloon by changing
the temperature of the gas inside the balloon. When the gas is
heated, the balloon rises. Which of the following best explains
this phenomenon? A. Heating the gas reduces its pressure. B.
Heating the gas decreases its density. C. Heating the gas decreases
its molecular motion. D. Heating the gas reduces the frequency of
the gas molecules collisions.
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Day 5 Answers 1. Which of the following choices is the best
label for the y-axis? B. molecular motion 2. Which of the following
best explains this phenomenon? B. Heating the gas decreases its
density.