Transcript Physical Science

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Bellbrook Jr.
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Matter-A
Matter-B
Motion
Force-C
Motion
Force-D
Energy-E
Energy-F
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Why do the same volumes of different
substances often have different masses?
A.They have different densities.
B.They have different hardnesses.
C.They have different melting points.
D.They have different degrees of electrical
conductivity.
A 100
A. They have different
densities.
A 100
Which statement best describes electrons?
A. They are positively charged particles located in
the nucleus.
B. They are negatively charged particles located I
the nucleus.
C. They are positively charged particles that move
around the nucleus.
D. They are negatively charged particles that move
around the nucleus.
A 200
D. They are negatively charged
particles that move around the
nucleus.
A 200
Which is the best description of an element?
A.A substance made of one type of atom.
B.A substance made of different kinds of
atoms.
C.A substance with positively and negatively
charged atoms.
D.A substance with different properties than
its individual atoms.
A 300
A. A substance made of one type
of atom.
A 300
Use the table below to answer the question.
A scientist collects a sample of one cubic centimeter (1 cm3) of each
of the elements on the table. Which of these volumes will have
the greatest mass?
A. Iron
B. Boron
C. Calcium
D. Magnesium
A 400
A. Iron
A 400
Use the table below to answer the question.
Drill bits are often coated to make them harder, so that they can drill
through many different types of materials. A coating of which
element from the table would make a drill bit the hardest?
A. Iron
B. Boron
C. Calcium
D. Magnesium
A 500
B. Boron
A 500
Scientists heat one liter of water until it
boils. How do they know this is a
physical and not a chemical change?
A.Bubbles appear in the water.
B.The water seems to disappear.
C.The water keeps the same chemical
properties.
D.The temperature of the boiling water
remains at 100 C
B 100
C. The water keeps the same
chemical properties.
B 100
Use the table below to answer the question.
A group of scientists is studying how elements change from solids to
liquids. They can create small bricks of boron, magnesium,
calcium, and iron. Each brick is 1 cm3. They place the bricks in
an oven and gradually heat them to 1,000 C. At that
temperature, which pair of bricks will still be in a solid state?
A. Boron and iron
B. Calcium and iron
C. Magnesium and boron
D. Magnesium and calcium
B 200
A. Boron and iron
B 200
Two substances are physically blended
together without chemically reacting. They
retain their original chemical and physical
properties. What is the combination of
these substances called?
A.A mixture
B.A molecule
C.An element
D.A compound
B 300
A. A mixture
B 300
The density of water is 1 cm3. Substances
whose density is less than that of water will
float on the surface of water. Which of the
following objects will float on water?
B 400
B 400
All forms of matter undergo change.
Identify two differences between
physical changes and chemical changes.
Then provide on example of each type of
change.
B 500
•In a physical change, the arrangement of atoms stays the
same, while in a chemical change, the atoms are rearranged.
•In a physical change, substances keep the same physical
properties, while in a chemical change, new substances are
created with new chemical properties.
•A physical change is reversible by physical methods, while
a chemical change is not reversible by physical methods.
•In a physical change, substances do not change their
chemical structure, while in a chemical change, substances
change their chemical structure.
•In a physical change, the same substances simple change
their physical properties, while in a chemical change, new
substances are created.
B 500
Which of the following graphs best
represents a car moving at constant speed of
2 m/s?
C 100
C 100
What will happen to a moving object if
all the forces acting on it are perfectly
balanced?
A.The object will increase its speed.
B.The object will slow down and stop.
C.The object will change the direction of its
motion.
D.The object will continue moving at a
constant speed.
C 200
D. The object will continue
moving at a constant speed.
C 200
A truck travels along a highway for a period of 80
minutes. The graph below shows the distance
traveled by that truck. According to the graph,
during what segment was the truck going at the
fastest speed?
A. Line F
B. Line G
C. Line H
D. Line I
C 300
B. Line G
C 300
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C 400
A student is looking out of his bedroom window and sees
a caterpillar crawling. He decided to time the
movement of the caterpillar. The caterpillar crawls
from point A to point B in 5 seconds. What is the
caterpillar’s speed?
A. 1 cm/s
B. 2 cm/s
C. 5 cm/s
D. 10 cm/s
C 400
B. 2 cm/s
C 400
Which of the objects on the chart below would
require the most force to achieve the same
increase in speed on a frictionless surface?
A. Egg
B. Basketball
C. Metal plate
D. Glass vase
C 500
D. Glass vase
C 500
Students are examining the motion of a basketball as part
of an experiment in science class. The diagram to the
right shows a constant unbalanced force being applied
to the basketball. What is one measurement they could
take to describe the motion of basketball?
A. The weight of the basketball
B. The force applied to the ball
C. The height that the ball can bounce
D. The distance it travels every 5 seconds
D 100
D. The distance it travels
every 5 seconds
D 100
A girl leaves her science class and walks 10 meters
north to get a drink at the water fountain. She
then turns around and walks another 30 meters
south to her mathematics class. What is the
distance and direction from her science class to
the mathematics class?
A. 20 m south
B. 40 m south
C. 20 m north
D. 40 m north
D 200
A. 20 m south
D 200
Force is measured in newtons (N). Two
forces are applied to a ball at rest. One
force is twice that of the other. Which
diagram best illustrates the direction the
ball will move?
D 300
D 300
An object is moving at a constant speed.
Based on the graph, what is the speed
of the object?
A.2 m/s
B.5 m/s
C.10 m/s
D.10 m/s
D 400
B. 5 m/s
D 400
A student throws a ball onto the ground. At first, the ball
rolls rapidly. After a few moments the ball stops
moving. Why did the ball stop moving?
A. The ball was subject to balanced forces.
B. Motion always requires an unbalanced force to
continue.
C. An unbalanced force, friction, stopped the motion of
the ball.
D. The student did not throw the ball hard enough to keep
it rolling.
D 500
C. An unbalanced force, friction,
stopped the motion of the ball.
D 500
A cement block is dropped from a helicopter. The
block falls 500 meters. Which statement
accurately describes the falling cement block?
A. Its potential energy decreases as its kinetic
energy increases.
B. Its potential energy increases as its kinetic
energy decreases.
C. Its potential energy is unchanged as its kinetic
energy decreases.
D. Its potential energy is unchanged as its kinetic
energy increases.
E 100
A. Its potential energy decreases
as its kinetic energy increases.
E 100
What happens when a substance is
heated?
A.The bonds within its atoms break down.
B.The molecules of the substance slow down.
C.The molecules of the substance move
faster.
D.The lighter particles in the substance
clump together.
E 200
C. The molecules of the
substance move faster.
E 200
Which device changes electrical energy
into light energy?
A.A flashlight
B.A gas stove
C.An electric oven
D.A hydroelectric power plant
E 300
A. A flashlight
E 300
A student works after school by mowing lawns. She uses
a gasoline-powered lawn mower. As she mows the
lawn, the mower gets hot. Which best describes the
transformation of energy that occurs?
A. Thermal energy - kinetic energy - nuclear energy
B. Chemical energy - kinetic energy - thermal energy
C. Potential energy - kinetic energy - chemical energy
D. Electrical energy - chemical energy - kinetic energy
E 400
B. Chemical energy - kinetic energy - thermal energy
E 400
Which is a form of kinetic energy?
A. Energy of moving molecules in a heated liquid
B. Energy stored in the chemical bonds of a
substance
C. Energy holding together the particles in an
atomic nucleus
D. Energy stored in an object’s position above
Earth’s surface.
E 500
A. Energy of moving molecules in a
heated liquid
E 500
What do geothermal and nuclear power
plants have in common?
A.They both burn organic materials.
B.They both produce carbon dioxide.
C.They both produce hazardous wastes.
D.They both use thermal energy to turn
turbines to make electricity.
F 100
D. They both use thermal energy
to turn turbines to make
electricity.
F 100
A group of scientists wishes to examine
ways of producing energy that cannot
be exhausted. Which energy source
should these scientists investigate?
A.Oil
B.Coal
C.Natural gas
D.Geothermal
F 200
D. Geothermal
F 200
What is the original source of the energy
found in fossil fuels like coal and oil?
A.Radiant energy from sunlight
B.Geothermal energy from Earth’s interior
C.Hydroelectric energy from running water
D.Energy from atomic nuclei splitting apart
F 300
A. Radiant energy from sunlight
F 300
How are solar energy and wind energy
similar?
A.Both are able to produce electricity.
B.Both are nonrenewable sources of energy.
C.Both rely on the power generated by the
sun.
D.Both produce high amounts of carbon
dioxide.
F 400
A. Both are able to produce
electricity.
F 400
What causes us to hear sounds?
A.Radiant energy from the sun.
B.Acoustic energy from vibrations of air.
C.Thermal energy released from molecular
motion.
D.Chemical energy discharged from
photosynthesis.
F 500
B. Acoustic energy from
vibrations of air.
F 500
The Final Jeopardy Category is:
Physical Science
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Final Jeopardy Question
Students perform a chemistry experiment by mixing baking soda with vinegar.
They mix 4 grams of baking soda with 50 grams of vinegar in a 6-gram plastic cup
as shown below. The cup is left uncovered. The students record the mass and
temperature of the mixture every 5 seconds. They continue these observations
until 10 seconds after they see the mixture stop bubbling. Their data are shown in
the table below.
The data show that the mass of the cup and its contents decreases while the
mixture is bubbling. Explain why the mass of the cup and its contents at 25
seconds is less than the initial total mass of the cup, baking soda and vinegar.
Include in your answer a valid scientific reason on which you based your
explanation.
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Correct Final Jeopardy Response
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