Hot steam that issues from a pressure cooker expands and
A) increases in temperature.
B) can cause severe burns.
C) cools.
D) all of the above
E) none of the above
Answer:
A pre-electronic thermostat employs a coiled
A) wire of low conductivity.
B) bimetallic strip.
C) tube of mercury.
Answer:
Which of the following might be considered a viable application of a radioactive
tracer?
A) adding a stream of radioisotopes to wastewater to examine where pollution goes
when it flows into the ocean
B) placing radioactive sources around a room to trace the location of people as they
move through the room
C) embedding a radioactive plug in a valuable necklace so that its location can be
determined using a Geiger counter
D) all of the above
E) none of the above
Answer:
When bringing water to a boil in the mountains, the time needed to reach the boiling
point is
A) less than at sea level.
B) more than at sea level.
C) the same as at sea level.
Answer:
The process in which one plate bends and descends beneath another plate is called
A) subduction.
B) seduction.
C) segregation.
D) sinking.
Answer:
Suggest why people once washed their hands with ashes.
A) The ashes act as a base and reacts with skin oils to produce solutions of soap.
B) The ashes act as an acid and reacts with the skin oils to produce soap.
C) The oils on the skin act as a base and reacts with the ashes to produce soap.
D) After being burnt in the fire, the acids and bases of the log are neutralized, making it
a gentle material to use on the hands.
Answer:
San Francisco has milder winters than Washington D.C. due to water’s high
A) conductivity.
B) specific heat capacity.
C) temperature in the Pacific Ocean.
Answer:
Which of the following statements best describes why a large nucleus is more likely to
undergo radioactive decay?
A) The nuclear forces are not as strong as the repulsive electrical forces between
nucleons.
B) The nuclear force between the nucleons are very strong and squeeze out other
nucleons.
C) The nucleon-nucleon attraction is stronger than the proton-proton repulsion.
D) The proton-proton repulsion cannot overcome the nucleon attraction.
E) All nuclei are equally likely to undergo radioactive decay.
Answer:
Some ________ rock is formed from minerals that were once dissolved in water.
A) sedimentary
B) igneous
C) metamorphic
D) igneous and metamorphic
Answer:
According to Galileo, the test of scientific truth is
A) experiment.
B) philosophical discussion.
C) evident patterns in nature.
D) logic.
Answer:
The induced electric and magnetic fields of Maxwell are
A) parallel to each other.
B) perpendicular to each other.
C) non-directional.
Answer:
The number of electrons delivered daily by power utilities to an average American
home during a typical week is
A) zero.
B) 110.
C) 220.
D) billions of billions.
E) none of the above
Answer:
Which has the greater kinetic energy?
A) a car traveling at 30 km/h
B) a car of half the mass traveling at 60 km/h
C) both the same
D) need more information
Answer:
What is wrong with the following depiction of a chemical reaction?
A) These boxes contain only molecules but no atoms.
B) One box contains more molecules than the other.
C) One box contains more atoms than the other.
D) All of the above.
Answer:
A white dwarf is a former
A) low-mass star.
B) high-mass star.
C) white giant.
Answer:
The work of surface water does all of the following except
A) erosion.
B) deposition.
C) land subsidence.
D) delta formation.
Answer:
A skillet is lined with a thin layer of cooking oil followed by a layer of unpopped
popcorn kernels. Upon heating the kernels all pop thereby escaping the skillet. Which
of the following physical and/or chemical changes occurred?
A) The water within each kernel is heated to the point that it would turn into water
vapor as the kernels popped (physical change).
B) The starches within the kernels are cooked by the high temperatures (chemical
change).
C) Both A and B occur.
D) Physical and chemical changes cannot occur without a real chemical reaction taking
place.
Answer:
The greatest expansion of water among the following occurs when
A) it turns to ice.
B) at 4C it gains thermal energy.
C) at 4C it loses thermal energy.
D) none of the above
Answer:
Why is secondary treatment often needed for sewage?
A) The dissolved organics are too high and lead to bacterial growth.
B) The solution is contaminated with dangerous bacteria.
C) There are too many dissolved inorganic compounds.
D) There are too many finely divided particles that need to be filtered.
E) none of the above
Answer:
Fluids in a metamorphic reaction
A) speed up the process.
B) neutralize the process.
C) slow down the process.
D) have no effect on the process of metamorphism.
Answer:
To say that one wave is out of phase with another is to say that the waves are
A) of different amplitudes.
B) of different frequencies.
C) of different wavelengths.
D) out of step.
E) all of the above
Answer:
The most underlying feature of machines is
A) energy conservation.
B) that energy input always equals energy output.
C) that power input always equals power output.
D) all of the above
E) none of the above
Answer:
Heat a copper wire and its electrical resistance
A) decreases.
B) remains unchanged.
C) increases.
Answer:
What statement best describes a mole?
A) a little furry mammal that lives in the ground
B) a very small number chemists use to count atoms or molecules
C) the amount of molecules or atoms in 1 gram of something
D) It is a very large number chemists use to count atoms or molecules.
E) none of the above
Answer:
If you do 10 J of work to push 1 coulomb of charge into an electric field, its voltage
with respect to its starting position is
A) less than 10 V.
B) 10 V.
C) more than 10 V.
D) none of the above
Answer:
Earthquake P-waves
A) travel in straight lines through Earth’s core.
B) cannot move through Earth’s core.
C) are transverse vibrations similar to sound waves.
D) are longitudinal vibrations similar to sound waves.
Answer:
Lillian safely touches a 100,000-volt Van de Graaff generator. Although the voltage is
high, the relatively small amount of charge means a relatively small amount of
A) energy transfer.
B) electric field.
C) polarization.
D) conduction.
Answer:
Based on atomic size, which would you expect to be more soluble in water: helium, He,
or nitrogen, ?
A) Although He is smaller, its outer orbital is filled and the atom will have little
attraction to the water molecules.
B) Since He atoms are smaller, more of them can fit into solution, so it has a higher
solubility in water.
C) Nitrogen atoms are bigger and so nitrogen molecules should be more soluble in
water due to greater dipole-induced dipole attractions.
D) He atoms are bigger and so helium molecules should be more soluble in water due
to greater dipole-induced dipole attractions.
Answer:
How would you describe the size of the following object?
a blood cell
A) microscopic
B) macroscopic
C) submicroscopic
D) all of the above
E) none of the above
Answer:
The mantle is composed of
A) iron and nickel.
B) iron-rich silicate rocks.
C) half liquid and half rocky material.
D) solid rock.
Answer: