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20 Points
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30 Points
30 Points
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30 Points
30 Points
40 Points
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50 Points
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50 Points
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50 Points
10 Points
Lead is a bluish-white metal that will burn in air to produce
lead (II) oxide. It is highly malleable and was used by the
Romans to make pipes to carry water ("plumbing" is taken
from the Latin name for lead "plum bum"). It has a
relatively low melting point of 327°C and an atomic
weight of 207.2 amu. Which property of lead is a chemical
property?
high malleability
burns in air
low melting point
atomic weight is 207.2 amu
WRONG ANSWER
burns in air
20 Points
In order to determine the velocity of an
object, what measurements must be
made?
time and distance
time, distance, and mass
time, distance, and direction
time, distance, and volume
TRY AGAIN
time, distance, and direction
30 Points
An analogy can be drawn between the work
done by an electric current flowing through
an electrical appliance and the work done
by water flowing over a waterfall. In such
an analogy, identify the property of the
electric current that is analogous to the rate
of flow of water over the fall.
power
voltage
amperage
resistance
The answer you thought was
right is WRONG
amperage
40 Points
Identify the types of fields that interact to
produce motion in an electric generator.
an electrical field and a gravitational field
a magnetic field and an electrical field
two electrical fields
two magnetic fields
Try again later
a magnetic field and an electrical field
50 Points
Identify the type's of current that can be
used to power electric motors.
direct current only
absolute current only
direct current or alternating current only
alternating current, direct current or absolute current
Wrong again
direct current or alternating
current only
10 Points
Complete the following reaction.
NaOH(aq)+HCl(aq)=_____+H2O(l)
2NaCl(1)
NaCl(s)
NaCl(aq)
2NaCl(aq)
BOO !
NaCl(aq)
20 Points
Which of the following will have the lowest pH?
rainwater
distilled water
soapy water
bleach
Sorry, Wrong Answer
rainwater
30 Points
Dr. M wants to perform research on the effects of exposure to
gamma radiation. Dr. B has developed a new type of instrument
that fires gamma radiation at tumors; he wants to research the
effectiveness of his "gamma knife." What is the fundamental
difference between the research performed by these two doctors?
Dr. M must know about nuclear decay, and Mr. B doesn't need to.
Dr. M's research is ethical and Dr. B's is not.
Dr. M is conducting a scientific investigation and Dr. B is not.
Dr. B is focusing on technological design and Dr. M is not.
GO BACK, and try
again
Dr. B is focusing on
technological design and
Dr. M is not.
40 Points
Alan constructs a circuit that has two 1.5 V
batteries arranged in series. These batteries
power a single light bulb. What will happen if
Alan adds another load in series?
The resistance of the circuit has increased, so more current will flow.
The voltage of the circuit has increased, so more current will flow.
The resistance of the circuit has decreased, so less current will flow.
The resistance of the circuit has increased, so less current will flow.
SORRY 
The resistance of the circuit
has increased, so less
current will flow.
50 Points
Which of the following substances is the most
chemically stable?
Mg2+
Mg+
ClMgCl2(s)
Wrong Answer
MgCl2(s)
10 Points
What is the danger of an uncontrolled chain
reaction within the core of a nuclear fission
reactor?
An uncontrolled chain reaction will use up all of the fuel in the
reactor and force the fission of the metals that make up the core
casing.
An uncontrolled chain reaction will produce enough heat to crack
the reactor core open, releasing radioactive material.
An uncontrolled chain reaction will produce enough electrons to
electrically charge the reactor core.
An uncontrolled chain reaction will produce enough heat to induce
fusion in the reactor core, which will result in an explosion.
Sorry, you have the
wrong answer
An uncontrolled chain reaction
will produce enough heat to
crack the reactor core open,
releasing radioactive material.
20 Points
The loss or gain of which subatomic
particle has the greatest effect on
chemical reactivity?
electron
proton
Neutron
nucleon
Try again later
electron
30 Points
What question did the students pose before
designing this experiment?
How does temperature affect the rate of the breakdown of
hydrogen peroxide into water and oxygen?
How much dye do I need to use to determine the presence
of hydrogen peroxide while performing this experiment?
How many plants should I put in the laboratory to have an
abundance of oxygen in the air?
How does time affect the increase in temperature when
hydrogen breaks down into oxygen and water?
SORRY, wrong answer
How does temperature affect the rate of
the breakdown of hydrogen peroxide
into water and oxygen?
40 Points
For new scientific knowledge to be gained, scientists must
share their ideas. What is an appropriate way for
scientists to communicate their findings?
Make flyers advertising their results.
Write a book immediately after the experiment is conducted,
pronouncing the discovery as fast.
Hold a press conference to share the information gained.
Submit complete information regarding the experiment to a peerreviewed scientific journal.
Wrong, wrong and
WRONG !
Submit complete information
regarding the experiment to a peerreviewed scientific journal.
50 Points
When energy is transformed from one form to
another, some of the energy is lost in the
form of
mechanical energy.
hydrogen gas.
water.
thermal energy.
Nope, not the right answer
thermal energy.
10 Points
Joey hit a wall with a 1 meter long sledgehammer
20 times with a force of 200 Newton's. Much to
Joey's dismay, the wall remained undamaged. If
work = force X distance, how much work did
Joey do on the wall?
0 joules
10 joules
200 joules
4000 joules
You should try studying
0 joules
20 Points
A recently-used hot ceramic teapot is placed on a
cold trivet. Which statement is correct about the
sequence of thermal energy transfers?
The air transfers energy to the teapot and trivet, and they become
cool.
The teapot transfers all of its energy to the air and becomes cool.
The teapot transfers some energy to the trivet and some energy to
the air and becomes cool.
The trivet transfers energy to the teapot and the teapot becomes
cool.
WRONG AGAIN
The teapot transfers some
energy to the trivet and some
energy to the air and becomes
cool.
30 Points
Smart glass technologies have become increasingly popular. British scientists
recently developed a window glass that helps buildings stay cool. At regular
temperatures, the glass allows in both infrared (IR) and ultraviolet (UV) light.
But above 29°C, the coating on the glass undergoes a chemical change,
causing it to block IR light. What happens to the IR light?
It is absorbed by the glass.
It is refracted by the glass.
It is relected by the coating on the glass.
It is refracted by the coating on the glass.
Try again later
It is relected by
the coating on the
glass.
40 Points
Which of the following produces energy from
processes that do not involve a chemical change?
a bonfire
a fossil fuel power plant
a nuclear power plant
a car
BOOO 
a nuclear power
plant
50 Points
What characteristic do all waves
share?
All waves move matter.
All waves transfer energy.
All waves can move through a vacuum.
All waves travel at 3.0X108 m/s.
Wrong again
All waves
transfer energy.
10 Points
What happens when two negativelycharged particles are brought together?
They undergo combustion.
They are repelled from each other.
They are attracted to each other.
They form an isotope.
Your wrong again
They are repelled
from each other.
20 Points
What is the resistance of a hair dryer that uses 4 A
of current when the voltage is 120 V?
480 ohms
40 ohms
30 ohms
0.33 ohms
Try again
30 ohms
30 Points
What was the main problem with J.J. Thomson's
model of the atom?
It did not account for protons, and so the Thomson model
was negatively charged.
It did not account for electrons, and so the Thomson model
was positively charged.
It hypothesized many more electrons than protons.
It did not account for a centralized nucleus contains most
of the atom's mass.
Try again
It did not account for a
centralized nucleus
contains most of the
atom's mass.
40 Points
The speed of an object increases 10 m/s over 10
seconds. What is its acceleration?
0 m/s^2
1 m/s^2
10 m/s^2
100 m/s^2

1 m/s^2
50 Points
Which of the following is a source of potential
energy that could release radiant energy?
a diamond
a sunflower seed
a neutron
a match
Go back and study then
try again later
a match