Part A Modified True/False
Indicate whether the sentence or statement is true or false.
If false, change the identified word or phrase to make the sentence
or statement true.
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1. |
Water and wind are factors
that affect the construction of bridges.
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2. |
The unit of pressure is the pascal.
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3. |
Two identical forces are exerted
on two separate surfaces. The surface with the larger area experiences
a larger pressure.
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Part B Completion
Complete each sentence or statement.
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4. |
Force is measured in ____________________.
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5. |
____________________ systems use
a liquid to transfer forces. ____________________ systems use a gas
to transfer forces.
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6. |
The pressure in a fluid ____________________
with depth.
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Part C Multiple Choice
Identify the letter of the choice that best completes the
statement or answers the question.
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7. |
Why do your ears sometimes pop when
you fly in an airplane?
a. |
Your body is compensating for the increased air pressure. |
b. |
Your body is compensating for the decreased
air pressure. |
c. |
Cheap headsets cause them to pop. |
d. |
Increased air pressure at high altitudes cause the popping. |
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8. |
What usually causes the pressure
in an explosion?
a. |
a chemical reaction heats and expands a gas |
b. |
gunpowder or dynamite expands |
c. |
gravity |
d. |
pressure |
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9. |
A brick has a base of  and weighs 30 N.
What pressure does a stack of 10 bricks create simulating the pressure
created by a low wall.
a. |
1.2 N/cm2 |
c. |
2.5 N/cm2 |
b. |
3 N/cm2 |
d. |
3 N/m2 |
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10. |
During the production of chocolate
bars, what would happen if the chocolate that surrounds the other ingredients
was too runny?
a. |
the centre would not be properly coated |
c. |
the mould might not fill completely |
b. |
the chocolate would solidify too quickly |
d. |
there would be air bubbles or gaps |
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Part D Short Answer
Use sentences to answer the following questions.
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11. |
Describe briefly what would happened
if the viscosity of ketchup is made too high.
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12. |
A glass jar is sealed with 50 000
Pa of oxygen gas inside it. What is the force exerted by the gas on
the inside walls and the lid if the total inside surface area is 0.05
m2?
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13. |
A gas, when compressed, reduces in
volume. Explain using kinetic molecular theory why a solid is not compressible.
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