Transcript Jeopardy - 8th Grade Physical Science

Jeopardy
Structure of Describing
Matter
Matter
Measuring
Motion
Energy
Waves
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Final Jeopardy
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All of the images below can be classified as:
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Molecules
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If something condenses the temperature
_____________ and the molecules would
appear to go from jar ___ to jar ___.
A
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B
C
If something condenses the temperature _stays
the same_ and the molecules would appear to
go from jar _C_ to jar _B_.
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Which boxes represent pure substances?
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Boxes X, Y and Z
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Name the number and type of subatomic
particles located within an atom of Xenon.
Protons = 54
 Electrons = 54
 Neutrons = 77
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1 - $500
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Which of the following represents an accurate
chemical reaction?
A) AlBr3 + K  3KBr + Al
B) 2FeO + PdF2  FeF2 + PdO
C) P4 + 6Br2  4PBr3
D) LiCl + Br2  2LiBr + Cl2
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C
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Describe how the movement of particles begins
to change as candle wax melts (2 ways). Is this
a physical or chemical change?
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Particles speed up and spread out. This is a
physical change.
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A student is baking a cake at home and has placed several
ingredients on the countertop to use. She has scooped some baking
soda into a measuring spoon. She accidentally knocks over a cup of
vinegar and several drops spill onto the spoon with the baking soda.
The baking soda begins to fizz where the vinegar spilled on it. When
the fizzing stops, Suzanne notices that about half of the baking soda
in the spoon is gone and there is now a liquid on the spoon. What
happened to the baking soda?
A. It melted into the vinegar.
B. It evaporated into the air.
C. It dissolved in the vinegar and formed a mixture.
D. It combined with the vinegar and produced a new gas.
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D
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2
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The chart below compares the properties of Charcoal and Carbon
Dioxide.
Charcoal
Carbon Dioxide
Formula
C
CO2
State at room temperature Solid
Gas
Soluble in water
No
Yes
Combustible in air
Yes
No
Based on the data in the table above, which is a reasonable conclusion
regarding elements and their compounds?
a. An element retains its physical and chemical properties when it is
combined into a compound.
b. When an element reacts to form a compound, its chemical properties
are changed but its physical properties are not.
c. When an element reacts to form a compound, its physical properties are
changed but its chemical properties are not.
d. Both the chemical and physical properties of a compound are different
from the properties of the elements of which it is composed.
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D
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Laura spilled perfume on the floor. When she
went to clean it up a few minutes later it had
disappeared. Explain what happened to the
perfume in terms of the law of conservation of
matter and state change.
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The law of conservation of matter states that
energy cannot be created or destroyed. This
means that the perfume did not disappear, it just
evaporated into a gas in the room.
2 - $500
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Label each example as either a physical or
chemical change.
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Physical, chemical, physical
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What will be the net force on the object below?
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50 N Left
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Name all forces involved in the picture below.
Then, place an arrow next to each force name
indicating the size and direction of the force.
Applied Force
Tensional Force
Sliding Friction
Gravity
Normal Force
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How fast is the object moving from time 0 s to
time 5 s in cm/s?
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S = D/T = 60m/5s = 6000cm/5s = 1200 cm/s
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In which picture has the person reached
terminal velocity? What does this mean about
the person’s motion?
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Diagram D – the person will continue to fall at a
constant speed
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Explain the motion of the vehicle at each of the
3 segments on the graph.
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0-10 minutes and 30-50 minutes = constant speed
10-30 minutes = no motion
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Which of these statements best describes
convection?
a. Movement of electromagnetic energy through solids
b. Transfer of thermal energy by electromagnetic
waves
c. Thermal energy transferred by moving molecules in
a fluid
d. Transfer of heat from one atom to the next by direct
contact
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C
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Name 3 energy conversions occurring in the
picture below:
Chemical to Electrical
 Electrical to Light/Electromagnetic
 Chemical and Electrical to Thermal
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4 - $300
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What type of circuit is pictured below? What will
happen if a bulb is added to the circuit?
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A series circuit. If a bulb is added all of the
bulbs will dim.
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How could you increase the advantage of the
scissors below:
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Move the fulcrum closer to the right, this allows
you to use less for over a greater distance.
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Both cups below contain a liquid at 95 degrees
Celsius. How does the thermal energy in the
two cups compare?
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The cup on the left has a higher amount of
thermal energy. Thermal energy depends on
mass and since it has more particles it will have
a higher thermal energy.
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Compare the two waves below in terms of
frequency and wavelength:
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Wave C has the highest frequency and the
shortest wavelength.
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How would the wave below need to change in
order to produce a louder and higher pitched
sound?
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W would need to be shorter and Y would need
to be taller.
5 - $300
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Which color of visible light carries the most
energy? The least? Which travels the fastest?
Red carries the least energy
 Violet carries the most energy
 They all travel at the same speed
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How fast does a 200 Hz wave travel if its
wavelength is 0.5 m? Show FSAU!
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S = F x W = 200 x 0.5 = 100 m/s
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Which wave interaction explains the figure
below?
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Refraction
Final Jeopardy
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What is the mechanical advantage of the
machine below?
300
kg
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MA = 2