Unit 3: Military Inventions: Question Preview (ID: 27375)


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What part of a tank makes it unique- different from other vehicles?
a) Tracks
b) Armour
c) Artillary
d) Computer

What branch of physics studies the movement of projectiles?
a) Nuclear
b) Chemistry
c) Ballistics
d) Geology

Who first invented gunpowder?
a) Romans
b) Americans
c) Chinese
d) Greeks

Which is NOT an ingredient in gunpowder
a) Sulfur
b) Saltpeter
c) Iron
d) Carbon

Doppler radar is used to track the movement of
a) Storms
b) Birds
c) Buildings
d) People

Which invention most revolutionized military weapons
a) Hand Weapons
b) War Animals
c) Gunpowder
d) Submarines

The Doppler effects cause which characteristic of an energy wave to change?
a) Amplitude
b) Speed
c) Volume
d) Frequency

At what depth is a submarine designed to operate?
a) less than 2,000 ft
b) equal to 2,000 ft
c) greater than 2,000 ft
d) 2,000-5,000 ft.

A rifled gun barrel shoots more acurately because it causes the bullet to:
a) spin
b) sail smoothly
c) go faster
d) jump

Which type of lever is best for a catapult?
a) 1st class
b) 2nd class
c) 3rd class
d) 4th class

What vehicle was designed for underwater warfare?
a) Battleship
b) Submarine
c) Hovercraft
d) Tank

What physical property allows submarines to rise and sink in the water?
a) Smoothness
b) Bouyancy
c) Temperature
d) Gravity

What substance is used as ballast on a submarine?
a) Water and Sand
b) Air and Sand
c) Water and Air
d) Bombs

What invention allows for the detection of objects using radio waves?
a) Sonar
b) Radar
c) Gunpowder
d) Tanks

What invention allows for detection of objects using sound waves?
a) Sonar
b) Radar
c) Gunpowder
d) Tanks

Which kind of radar system listens for signals only?
a) Passive
b) Active
c) Acoustic comunication
d) Sonar

Which invention required submarines to be made larger?
a) More Crew members
b) Torpedoes
c) Nuclear Reactors
d) Ballast tanks

Which military invention was first used in World War I?
a) Gunpowder
b) Calvary
c) Tanks
d) Submarines

Which of the following served some of the same military purposes as a tank?
a) Cannon
b) Radar
c) Submarine
d) Elephant

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