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Unit 3: Military Inventions
Test Description: God's Design for the Physical World Series. Textbook: Inventions Technology
Instructions: Answer all questions to get your test result.
1) Which type of lever is best for a catapult?
A
4th class
B
2nd class
C
1st class
D
3rd class
2) A rifled gun barrel shoots more acurately because it causes the bullet to:
A
go faster
B
sail smoothly
C
jump
D
spin
3) At what depth is a submarine designed to operate?
A
greater than 2,000 ft
B
2,000-5,000 ft.
C
less than 2,000 ft
D
equal to 2,000 ft
4) The Doppler effects cause which characteristic of an energy wave to change?
A
Speed
B
Volume
C
Amplitude
D
Frequency
5) Doppler radar is used to track the movement of
A
Buildings
B
Storms
C
Birds
D
People
6) Which invention most revolutionized military weapons
A
Hand Weapons
B
Gunpowder
C
War Animals
D
Submarines
7) Which is NOT an ingredient in gunpowder
A
Sulfur
B
Saltpeter
C
Iron
D
Carbon
8) Who first invented gunpowder?
A
Chinese
B
Greeks
C
Romans
D
Americans
9) What branch of physics studies the movement of projectiles?
A
Chemistry
B
Nuclear
C
Geology
D
Ballistics
10) What part of a tank makes it unique- different from other vehicles?
A
Computer
B
Armour
C
Tracks
D
Artillary
11) What vehicle was designed for underwater warfare?
A
Hovercraft
B
Submarine
C
Battleship
D
Tank
12) What physical property allows submarines to rise and sink in the water?
A
Gravity
B
Temperature
C
Bouyancy
D
Smoothness
13) What substance is used as ballast on a submarine?
A
Water and Sand
B
Air and Sand
C
Bombs
D
Water and Air
14) What invention allows for the detection of objects using radio waves?
A
Tanks
B
Sonar
C
Gunpowder
D
Radar
15) What invention allows for detection of objects using sound waves?
A
Radar
B
Sonar
C
Tanks
D
Gunpowder
16) Which kind of radar system listens for signals only?
A
Passive
B
Acoustic comunication
C
Sonar
D
Active
17) Which invention required submarines to be made larger?
A
Nuclear Reactors
B
More Crew members
C
Torpedoes
D
Ballast tanks
18) Which military invention was first used in World War I?
A
Gunpowder
B
Calvary
C
Submarines
D
Tanks
19) Which of the following served some of the same military purposes as a tank?
A
Elephant
B
Submarine
C
Radar
D
Cannon
*select an answer for all questions
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