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