Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
1) Dolphins talk to each other using whistles and clicks. Clicks help dolphins find prey and whistles are used
to talk with other dolphins. How is this possible?
A)
B)
C)
D)
Sound travels through liquids and gases.
Sound travels through solids, liquids, and gases.
Sound can only travel through liquids in the form of clicks and whistles.
They are special sounds that only dolphins can hear because they are in water.
2) Computers, televisions, and telephones are just a few devices that make up the various pieces of our
everyday electronic communities. These devices communicate with each other using a variety of wires, cables,
radio signals, and infrared light beams. What is the wireless technology standard used to exchange data over
very short distances connecting cellular phones, computers, and other electronic devices together?
A)
B)
C)
D)
bluetooth
modem
router
wifi
3) When light strikes a plane mirror, images form in locations where light does not actually reach. It only
appears to the observer as though the light were coming from this position. What type of image is formed?
A)
B)
C)
D)
real image
virtual image
duplicate image
imaginary image
4) By now, you know that sound is produced by vibrations. These vibrations can travel through solids, liquids,
and gases, but not through ______________.
A)
B)
C)
D)
empty space
granite rock
living objects
the center of the earth
5) Imagine you are standing on one side of a wall and there is a light source on the other side. Which BEST
describes why the light would become brighter as you approached the open door in the wall?
A)
B)
C)
D)
absorption
diffraction
reflection
refraction
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
6) Based on the data in the table, what can we reasonably conclude about the speed of sound through various
materials?
A)
B)
C)
D)
The speed of sound is faster in lighter materials.
The speed of sound is higher in liquids than in solids.
The speed of sound is higher in solids than in liquids.
The speed of sound moves slower when atoms are closely packed.
7) The law of reflection states that light is reflected off a surface at the same angle that light hits the surface.
The arrow on the left that shows the direction of light is the ____________________________.
A)
B)
C)
D)
incident ray.
reflected ray.
refracted ray.
coincident ray.
8) What value relates the speed of light in a vacuum to the speed of light in a given material?
A)
B)
C)
D)
angle of incidence
angle of refraction
index of refraction
index of reflection
9) Comparing Wave A (black) to Wave B (green), Wave A has a _____________________.
A)
B)
C)
D)
higher crest.
higher frequency.
longer wavelength.
greater amplitude.
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
10) As Sally sat in the dining room doing her homework, a car passed by her house. It was a convertible. The
driver had the music blaring, blaring so loud that the windows in Sally's house began to vibrate. This transfer of
vibration is called ______________________.
A)
B)
C)
D)
reciprocity.
reflection.
refraction.
resonance.
11)
It is the nature of broadcast transmissions that, when you broadcast, only some of the energy is
received and used. The energy that is not received goes to waste. It's only nanowatts of energy, but
the energy is everywhere. This system uses that fact to power very small low-energy devices. The
radio frequency transmissions come from wireless networks, and as our hunger for information goes
up, the amount of data that we want to transmit is going up exponentially, and therefore this is
growing all the time.
The output can feed into many energy storage devices – which today for the majority of electronic devices is a
battery, but in the future could include other options such as a super-capacitor. The statement above describes
the Freevolt system which uses unused energy transmitted by radio waves to power devices that require small
amounts of energy. Why is a battery required to store this excess energy before it is transferred to these devices?
A)
B)
C)
D)
The energy in individual radio waves must be combined and converted into direct current before it is
available as electricity.
The energy in the radio waves must be converted into chemical energy to power devices.
The high frequency of radio waves would damage devices if it was used directly.
The amplitude of radio waves must be reduced in order to provide electricity
12) As ocean waves get closer to the shore they slow down. This slowing causes them to bend and come in
close to parallel with the shore. This is because shallow water and deep water can be thought of as two different
media. This bending of a wave is the wave interaction known as
A)
B)
C)
D)
diffraction
interference
reflection
refraction
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
13) Which wave source can travel through the vacuum of space?
A)
B)
C)
D)
lasers
sound waves
pressure waves
high frequency whistles
14) The term wireless refers to a variety of technologies and devices, such as smartphones, computers,
printers, headphones, and speakers. A wireless network uses _______________ waves to transmit signals.
A)
B)
C)
D)
radio
sound
microwaves
mechanical
15) How does an object look when it is viewed through an opaque object?
A)
B)
C)
D)
The object can not be seen.
The object can be seen clearly.
The object appears as a blurry shape.
The object is clear but the shape is distorted.
16) On vacation at the beach, you bring a radio to the beach. The radio can pick up several different radio
stations.Which is the best explanation for this?
A)
Sound waves can travel from through the air from the station to your radio.
B)
Radio stations broadcast from different locations using their own transmitters.
C)
Sound of different pitches are used to transmit information from each radio station. These sound waves
can travel over land.
D)
Waves are used to transmit the radio signal through the air. These waves are encoded at different
frequencies for different stations.
17) The diagram shows an early model of the atom. It was suggested by JJ Thompon. The atom was thought to be
positively charged with small bits of negatively charged electrons spread throughout. this model is known as
A)
B)
C)
D)
The bohr model of the atom.
The qunatum model of the atom.
the plum pudding model of the atom.
The solar system model of the atom.
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
18) Rutherford and his colleagues fired a beam of small, positively charged alpha particles at thin gold foil. Some of these
alpha particles were deflected at angles as they passed through the foil.
What conclusion did Rutherford and his colleagues draw from their results?
A)
The atom must contain some neutral charge spread throughout the atom. He called these particles neutrons.
B)
The atom must contain some centrally located negative charge. He called this core of negative charge the nucleus.
C)
The atom must contain some centrally located positive charge. He called this core of positive charge the nucleus.
D)
Thomson's plum pudding model of the atom was correct. The atom contains positive charge spread throughout its
structure.
19) Modern atomic theory states that the atom is a diffuse cloud of ________ surrounding a small, dense nucleus.
A)
B)
C)
D)
electron
neutron
proton
quark
20) Which letter indicates subatomic particles that each have a mass of 1 amu?
A)
B)
C)
D)
A&B
A&C
B&C
C&D
21) In the modern model of the atom over 99.9% of the atom is made up of ________________________________.
A)
Protons
B)
Neutrons
C)
Electrons
D)
Empty space
22) Describe the composition of the nucleus of an atom.
A)
B)
C)
D)
It is composed of protons.
It is composed of protons and neutrons.
It is composed of protons and electrons.
It is composed of protons, neutrons, and electrons.
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
23) Which scenario listed below does NOT demonstrate the relationship between the pressure and temperature in a gas?
A)
B)
C)
D)
Squeezing a balloon and watching it pop outside on a sunny day.
A fully-inflated car tire bulging after traveling on a hot road surface for two hours.
Popping the dent out of a ping pong ball after placing it in a pan of really hot water.
Taking a previously, fully-inflated balloon out of the freezer and observing that its size is now half of the original
size.
24) How will the behavior of the gases in the piston chamber change if heat is applied to the system? Assume the piston
moves to keep the pressure constant.
A)
B)
C)
D)
The gas particles will speed up.
More gas particles will be produced.
Fewer gas particles will be produced.
The kinetic energy will decrease.
25) If you fill up a balloon with a small amount of air, then set it in direct sunlight, you will see that the balloon expands.
This expansion is due to an increase in volume, which results from ___________________________________.
A)
B)
C)
D)
a decrease in the pressure of the air in the balloon.
an increase in the temperature of the air in the balloon.
an decrease in the pressure of the air outside of balloon.
an increase in the temperature of the rubber that makes the ball
Ideal Gas Law
P*V = n*R*T
where
P = pressure
V = volume
n = number of moles
R = the universal gas constant
T = temperature in degrees Kelvin
26) How is the pressure of a gas related to its concentration of particles?
A)
B)
C)
D)
Pressure will expand a gas, enlarging its volume and reducing its density and concentration of particles.
Pressure will magnify a gas, developing its volume and multiplying its density and concentration of particles.
Pressure will compress a gas, reducing its volume and giving it a greater density and concentration of particles.
Pressure will accelerate a gas, extending its volume and allowing a smaller density and concentration of particles.
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
27) Under which set of circumstances will the pressure of a gas DEFINITELY increase?
A)
B)
C)
D)
Increasing the moles and increasing the volume of the gas.
Raising the temperature and reducing the volume of the gas.
Lowering the temperature and reducing the volume of the gas.
Raising the temperature and increasing the volume of the gas.
28) At very high pressures, gases become ____________ and will eventually _______________.
A)
B)
C)
D)
more dense; become hotter
more dense; change to a liquid or solid
less dense; combust
less dense; turn into a liquid
29) Nomex® brand fiber is a popular fiber used in protective apparel due to its heat resistant and flame resistant
properties. Nomex fiber is woven into the material used to make the apparel for various professions. Which uniform or
suit might NOT use Nomex material?
A)
B)
C)
D)
NASCAR suit
doctor lab coat
firefighter suit
military pilot suit
30) Plastic technology has improved so much in the past few years. Many types of plastics have been developed for
many different uses. For plastics, the definition of high temperature is taken to mean any temperature above 135°C and
most available plastics can only be used at temperatures below this value. These plastics are generally called the
commodity plastics, plastics you use everyday in the home and are the largest volume of plastics used in the world today.
Which choice explains why a plastic container placed in the microwave distorts and changes shape?
A)
B)
C)
D)
The pressure threshold of the plastic material was reached, causing the container to distort and change shape.
The head generated by the microwaves cause the molecules of the plastic container to gradually melt and turn into
a new substance.
Plastic is a malleable substance. The pressure generated by the microwaves on the container cause the sides to
cave in and the container distorts.
The temperature threshold of the plastic material was reached, causing it to molecules to increase in motion
enough to cause the plastic to flow and distort.
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
31) Ocean currents are caused by water's density differences. The density differences in the ocean water are due to
different salt concentrations and differences in _____________________.
A)
B)
C)
D)
waves.
temperature.
plate tectonics.
volcanic activity.
32) As atmospheric gases warm, they will rise up higher in the atmosphere. The opposites is also true...as atmospheric
gases cool down, the air will sink. This occurs over and over and air is heated and cooled. Which of these is the main
factor that would contribute to this constant movement of the air?
A)
B)
C)
D)
density
mass
matter
electricity
33) According to Charles Darwin’s theory of natural selection, __________________________________.
A)
B)
C)
D)
people control evolution.
the fastest species always survive.
the strongest species always survive.
the fittest species survive.
34) The ability to show common ancestry is evidence of ______________________.
A)
B)
C)
D)
adaptation
reproduction
phases
evolution
35) When organisms have structures that are similar in features but different functions this is ______________.
A)
B)
C)
D)
analogous
evolution
homologous
mutation
Second Nine Weeks
Science Exam
December 18, 2018
Name ______________________________________ Student ID:_____________ Grade_____ Period____
36)
If the above two waveforms were sound waves, we would hear the ___________ wave louder. If the above two
waveforms were light waves, we would see the ________ wave dimmer.
A)
B)
C)
D)
red, red
green, red
red, green
green, green
37) You see an image of yourself in a mirror because light waves are _______________________________.
A)
B)
C)
D)
diffracted.
reflected back at you.
refracted through air.
refracted to a focal point.
38) In what way are all sound waves and light waves similar?
A)
B)
C)
D)
They both transmit energy.
They both require a medium for transmission.
Neither of them require a medium for transmission.
They both transmit matter without transmitting energy.
39) All waves carry _________________________.
A)
B)
C)
D)
energy.
light.
matter.
particles.
40) Evidence for evolution includes the presence of _______________________, which are similar structures shared by
different species.
A)
B)
C)
D)
gradual structures
vestigial structures
integrated structures
homologous structures