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