Physical Science 2nd Nine Weeks Test 2013 B
 
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Physical Science 2nd Nine Weeks Test 2013 B

Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

A person walks 1 mile every day for exercise, leaving her front porch at 9:00 am. and returning to her front porch at 9:25 am. What is the total displacement of her daily walk?
a.
1 mile
c.
25 minutes
b.
0
d.
none of the above
 

 2. 

The slope of a line on a distance-time graph is
a.
distance.
c.
speed.
b.
time.
d.
displacement.
 

 3. 

What is the speed of a bobsled whose distance-time graph indicates that it traveled 100 m in 25 s?
a.
4 m/s
c.
0.25 mph
b.
2500 m/s
d.
100 m/s
 

 4. 

The rate at which velocity changes is called
a.
speed.
c.
acceleration.
b.
vectors.
d.
motion.
 

 5. 

The slope of a speed-time graph indicates
a.
direction.
c.
velocity.
b.
acceleration.
d.
speed.
 

 6. 

An object that is accelerating may be
a.
slowing down.
c.
changing direction.
b.
gaining speed.
d.
all of the above
 

 7. 

The SI unit of force is the
a.
joule.
c.
meter.
b.
kilogram.
d.
newton.
 

 8. 

When an unbalanced force acts on an object,
a.
the object’s motion does not change.
c.
the weight of the object decreases.
b.
the object accelerates.
d.
the inertia of the object increases.
 

 9. 

The property of matter that resists changes in motion is called
a.
friction.
c.
inertia.
b.
gravity.
d.
weight.
 

 10. 

According to Newton’s second law of motion, the acceleration of an object equals the net force acting on the object divided by the object’s
a.
mass.
c.
velocity.
b.
momentum.
d.
weight.
 

 11. 

Your weight equals your
a.
mass.
b.
mass divided by the net force acting on you.
c.
mass times the acceleration due to gravity.
d.
mass times your speed.
 

 12. 

Newton’s third law of motion describes
a.
action and reaction forces.
c.
centripetal forces.
b.
balanced forces.
d.
net force.
 

 13. 

The product of an object’s mass and velocity is its
a.
centripetal force.
c.
net force.
b.
momentum.
d.
weight.
 

 14. 

What is conserved when two objects collide in a closed system?
a.
acceleration
c.
speed
b.
momentum
d.
velocity
 

 15. 

The force that keeps an object moving in a circle is called
a.
centripetal force.
c.
inertia.
b.
fluid friction.
d.
momentum.
 

 16. 

In order to calculate pressure exerted on a surface, what quantity is divided by the surface area?
a.
altitude
c.
mass
b.
force
d.
volume
 

 17. 

What is the SI unit of pressure?
a.
g/cm3
c.
the newton
b.
m/s2
d.
the pascal
 

 18. 

The operation of a hydraulic lift system is explained by
a.
Archimedes’ principle.
b.
Bernoulli’s principle.
c.
Newton’s principle.
d.
Pascal’s principle.
 

 19. 

The relationship between buoyant force and weight of a displaced fluid was first stated by
a.
Archimedes.
c.
Newton.
b.
Bernoulli.
d.
Pascal.
 

 20. 

Which of the following substances will float in corn syrup? (The density of corn syrup is 1.38 g/cm3.)
a.
copper (8.9 g/cm3)
c.
iron (7.8 g/cm3)
b.
silver (10.5 g/cm3)
d.
glycerin (1.26 g/cm3)
 

 21. 

Which of the following substances will sink in glycerin? (The density of glycerin 1.26 g/cm3.)
a.
water (1.00 g/cm3)
c.
benzene (0.90 g/cm3)
b.
ethyl alcohol (0.81 g/cm3)
d.
aluminum (2.70 g/cm3)
 

 22. 

Why does a hot-air balloon float?
a.
The shape of the balloon provides lift.
b.
The volume of the air displaced by the balloon is less than the volume of the balloon.
c.
The weight of the air displaced is less than the volume of the balloon.
d.
The weight of the balloon is less than the weight of the air displaced by the balloon.
 

 23. 

Work is a transfer of
a.
energy.
c.
mass.
b.
force.
d.
motion.
 

 24. 

The energy of motion is called
a.
kinetic energy.
c.
thermal energy.
b.
potential energy.
d.
work.
 

 25. 

Which of the following is an example of an object with elastic potential energy?
a.
a wind-up toy that has been wound up
b.
a compressed basketball
c.
a stretched rubber band
d.
all of the above
 

 26. 

Which of the following increases when an object becomes warmer?
a.
chemical energy
b.
elastic potential energy
c.
nuclear energy
d.
thermal energy
 

 27. 

The energy stored in gasoline is
a.
chemical energy.
c.
mechanical energy.
b.
electromagnetic energy.
d.
nuclear energy.
 

 28. 

Nuclear power plants are designed to convert nuclear energy into what type of energy?
a.
chemical
c.
geothermal
b.
electrical
d.
mechanical
 

 29. 

Which of the following statements is true according to the law of conservation of energy?
a.
Energy cannot be created.
b.
Energy cannot be destroyed.
c.
Energy can be converted from one form to another.
d.
all of the above
 

 30. 

The equation E = mc2 relates energy and
a.
force.
c.
mass.
b.
gravity.
d.
work.
 



 
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