Download Semester Review

Semester Review
Name_______________________
Check the best answer
1.) What is the base unit of length in the metric system?
 The king’s foot
 The meter
 The centimeter
 The kilometer
 The second
2.) Why might the United States might have difficulty completely
converting to the metric system?
 It would be difficult to sell cars to Japan
 Satellites might crash
 It would be expensive
 It would be hard to convert money
3.) How many centimeters are in 6.7 kilometers?
 670,000 centimeters
 67,000,000 centimeters
 670,351 centimeters
 .000067 centimeters
4.) Why is density a “derived unit?”
 Density comes from the Latin word for “deranged”
 Density is found by dividing an object’s mass by its length
cubed
 Density is volume divided by mass, which are both
fundamental units
 Density refers to how much of the brain remains after drug
usage
5.) What is the average density of a Sumo wrestler with a mass
of 200 kilograms and a volume of 100 liters?
 2 grams per milliliter (or 2 kilograms per liter)
 200 kilograms per liter
 2 pounds per square inch
 .002 kilograms per milliliter
6.) Surfers rub wax on their surfboards so they can stick to
them while turning on steep parts of a wave. What type of
friction prevents surfer’s feet from sliding?
 Kinetic friction
 Static friction
 Both
 Neither
7.) Which has the greatest inertia?
 A bullet fired from a shotgun
 A skydiver before jumping from an airplane
 A small insect smashing into a windshield
 A nonmoving airplane
8.) A newly discovered planet called “Waveland” has a
biosphere similar to earth’s and a race of small intelligent
animals which spend their lifetime playing in the planet’s
turquoise oceans. While playing in the ocean with these
creatures, you realize that your weight is less on this planet
than on earth. How is the mass of “Waveland” different
from the earth’s mass?
 “Waveland” is more massive than earth
 Earth is more massive than “Waveland”
 They are the same
 “Waveland” has better waves
9.) Why do Astronauts in a space shuttle orbiting the earth
float?




Outside the earth’s atmosphere, gravity does not
exist
The space shuttle and its occupants are free-falling
while orbiting the earth
Although the earth pulls on the space shuttle, it does
not pull on the astronauts
They forgot to turn on the oxygen generator, so they
float due to a lack of oxygen
10.) Why don’t you notice the gravitational force between you
and a large truck passing by?
 The truck is so large and you are so small
 The earth’s gravitational pull overpowers the
gravitational forces between you and the truck
 You do feel the gravitational pull from the truck
because it causes your hair to stick up
 The gravitational force does not exist
11.) What is the difference between speed and velocity?
 Speed is an “upper” and velocity is a “downer”
 Velocity is faster
 Speed is the English system, while velocity is metric
 Velocity must also include the direction with the
speed of the object
12.) A motorcycle racer speeds up from zero to sixty miles per
hour in .003 hours. What is the average acceleration of the
racer?
2
 100 miles/hour
2
 20,000 miles/hour (60 miles per hour in 10.8
seconds)
 Faster than the speed of light
 168,000 miles per hour
13.)What is the mass of an object which requires a 3000
Newton force to give it an acceleration of 3 meters/second2?
 100,000 kilograms
 1,000 kilograms (1,000,000 grams)
 10 kilograms
 1 kilogram
 0.1 kilograms (100 grams)
14.) What is the name of the acceleration which forces an object
to travel in a circular path??
 Centrifugal
 Coriolis
 Inertia
 Centripetal
14.)What is pressure?
 Force time area
 Force divided by area
 A very hard exam
15.)Why is the pressure exerted by a Sumo wrestler’s foot so
much more than the pressure exerted by a ballet dancer with
the same sized foot?
 The weight of a sumo wrestler causes a much greater
force
 Sumo wrestlers have small bones inside the foot
which lead to a much greater pressure
 Sumo wrestlers can jump higher than ballet dancers
 The center of mass of a sumo wrestler is much
lower, allowing them to push down with more force
16.)What happens to the barometric pressure during clear
weather?
 It is relatively high
 It is relatively low

It stays the same
17.)How much work is done by a student lifting a 0.1 kilogram
pencil 0.25 meters to write on a piece of paper?
 It requires no work at all
 0.025 Joules
 0.025 Watts
 0.025 Decibels
18.)You hear your favorite song on the radio, so you decide to
turn up the volume. What does this change about the sound
waves approaching your ear?
 They become faster
 They increase frequency
 They increase pitch
 They increase loudness and amplitude
 They increase wavelength
19.)What do waves transport through space?
 Energy
 Matter
 Surfers
 Little green men
 Molecules
20.)What happens when two waves traveling in opposite
directions run into each other?
 They travel through each other after experiencing
superposition
 They bounce off each other
 Nothing interesting happens, they just die
 They settle down and have a family
21.)Which media prevents the transmission of sound?
 Empty space



Air molecules
Rocks
Water
22.)How is each note played by a musician different?
 Each note has a different amplitude
 Each note has a different quality
 Each note creates sound waves with a different speed
 The number of vibrations of the sound board per
second (frequency) is different for each note
23.)Why do you see lightning before you hear a thunderclap?
 Light travels a million times faster than the speed of
sound
 Sound travels faster than the speed of light
 Your eyes deceive you, light and sound travels at the
same speed
 It takes your brain more time to translate sound
waves
24.)What isn’t true about electromagnetic radiation?
 Electromagnetic radiation travels through space in
the absence of air molecules
 Electromagnetic radiation is a transverse wave
consisting of a magnetic and electric field
disturbance
 Shorter wavelength (higher frequency) radiation
does not cause any problems for human reproduction
 Scientists can use electromagnetic radiation to
estimate what stars are made of and how they are
moving in space
(Major bonus question: you must answer this question to
receive an A on this test)
25.)Give an example of how understanding a specific topic in
class could improve your performance in a specific
activity. To get full credit, you must clearly describe the
activity, the scientific principles involved and exactly how
understanding these principles improves performance.