Unlock document.
This document is partially blurred.
Unlock all pages and 1 million more documents.
Get Access
A balanced chemical equation will have the same ______________ on each side.
A) number of moles
B) number of molecules
C) mass of each compound
D) number of atoms of each element
A projectile's vertical velocity component
A) changes most rapidly near the top of its trajectory.
B) changes at a constant rate.
C) changes most rapidly near the bottom of its trajectory.
D) does not change.
Which of the following is the smallest dwarf planet?
A) Ceres
B) Mercury
C) Pluto
D) Eris
Gas and dust distributed among the stars is known as the _______________.
A) interstellar vacuum
B) interstellar void
C) Oort cloud
D) interstellar medium
Which of the following quantities expressed in derived units includes the unit of length?
A) Area
B) Volume
C) Speed
D) Density
E) All of these
That a planet moves with different speeds in its orbit is given by which of Kepler's
laws?
A) First
B) Second
C) Third
D) Fourth
An air mass forming over the Gulf of Mexico would be classified as
A) mE.
B) mT.
C) aP.
D) cE.
The most distant planet that can be seen with the unaided eye is
A) Jupiter.
B) Saturn.
C) Uranus.
D) Neptune.
4-Fluoroheptane and 5-fluoroheptane are
A) isomers.
B) the same compound.
C) neither isomers nor the same compound.
What type of galaxy is the Milky Way?
A) Spiral
B) Elliptical
C) Regular
D) Irregular
When the Moon is on an observer's meridian at 9 A.M., the Moon is in the
______________ phase.
A) waning crescent
B) waning gibbous
C) waxing crescent
D) waxing gibbous
We define the total mechanical energy of an object as
A) potential energy plus kinetic energy.
B) inertial energy plus kinetic energy.
C) gravitational energy plus potential energy.
D) mental energy plus physical energy.
How many protons does Se have?
A) 74
B) 72
C) 91
D) 74
E) 34
A chemical reaction is at equilibriumwhen
A) no reactants are changing to products.
B) the forward and reverse reactions proceed at the same rate.
C) the total mass has become constant.
D) the temperature is no longer changing.
A standard unit
A) is the same in all systems of units.
B) may not be fixed in value.
C) is found only in the British system.
D) is used for taking accurate measurements.
E) is found only in the metric system.
Igneous rock that formed on Earth's surface by solidification of lava is known as
A) extrusive rock.
B) intrusive rock.
C) metamorphic rock.
D) silicate rock.
Wind speed is measured by means of
A) a psychrometer.
B) an anemometer.
C) a wind vane.
D) a barometer.
The compound Mg(OH)2is commonly known as
A) Epsom salt.
B) Alka-Seltzer.
C) smelling salts.
D) milk of magnesia.
The phase of the Moon that one observes on the overhead meridian at 10 P.M. local
time is a ______________ moon.
A) waxing crescent
B) waning crescent
C) waxing gibbous
D) waning gibbous
Theoretical limits on measurement accuracy are set by a principle associated with
which scientist?
A) de Broglie
B) Schrdinger
C) Heisenberg
D) Pauli
A reflected ray of light leaves a plane mirror's surface at an angle of 50 relative to the
normal. The angle of incidence was
A) 50 relative to the surface.
B) 50 relative to the normal.
C) 90 from the surface.
D) none of these.
What happens to a sample of water when its temperature is reduced between 0°C and
4°C?
A) Its density increases.
B) It vaporizes.
C) Its density decreases.
D) Its density remains constant.
The nuclide at the top of the "relative stability of nucleus versus mass number" curve is
A) iron-56.
B) uranium-235.
C) uranium-238.
D) helium-4.
The atomic number (Z) of an element is equal to the number of ______________ in one
of its atoms.
A) protons
B) neutrons
C) protons plus neutrons
D) neutrons plus electrons
Which of the following radionuclides is used to date once-living material?
A) Rubidium-87
B) Potassium-40
C) Thorium-232
D) Carbon-14
What basic type of reaction is illustrated by the general equation AB+ CDAD + BC?
A) Combination
B) Decomposition
C) Double-replacement
D) Single-replacement
Charon is a moon of ______________ .
A) Earth
B) Venus
C) Neptune
D) Mars
E) Pluto
The rate at which air temperature changes with altitude is called
A) the inversion rate.
B) vertical development.
C) the lapse rate.
D) an isotherm.
The temperature of the Sun's interior is estimated to be about how many kelvins?
A) 1500
B) 15 million
C) 5 billion
D) 60,000
Our solar system lies about how many light-years from the center of the nuclear bulge
of the Milky Way?
A) 2400
B) 28,000
C) 110
D) 4.3
Which of these instruments is based on the theory of matter waves?
A) Microwave oven
B) X-ray tube
C) Electron microscope
D) Cathode ray tube
A large volume of the solar system's space is occupied by
A) meteors.
B) micrometeoroids.
C) asteroids.
D) comets
Magma viscosity depends on the ______________ content and the temperature of the
magma.
The meter is presently defined as
A) one ten-millionth of the diameter of Earth.
B) the wavelength of a line in the spectrum of krypton-86.
C) the length of a platinum-iridium bar.
D) the distance light travels in a vacuum in a very short time.
The process by which liquid fats, such as vegetable oils, can be converted to solid fats
is called
A) hydrogenation.
B) saturation.
C) carbonation.
D) oxygenation.
The ______________ states that in a sequence of undisturbed sedimentary rocks, lavas,
or ash, each layer is younger than the layer beneath it.
A(n) ______________ is the surface expression of magma that originates in the
asthenosphere and deeper.
The point in the sky directly above an observer's head is called the ______________.
______________ is the process whereby energetic molecules escape from a liquid.
Calculate the force on a string tied to a ceiling with a 9.0-kg mass attached.
The International Date Line is a theoretical line following approximately the
______________ meridian.
Gas, lava, and ______________ are the three general products emitted during a
volcanic eruption.
Ethyne, H"CC"H, is also named ______________.
Calculate the de Broglie wavelength for an electron (m= 1 x 10-30 kg) moving at 2.4 x
106m/s.
Which two of the following places are nearest to each other?
Place Aat latitude 20N, longitude 90W
Place Bat latitude 30N, longitude 90W
Place Cat latitude 30N, longitude 75W
Place Dat latitude 20N, longitude 75W
A change in motion requires a(n) ____________.
In straight-line motion, if a moving object slows down, the direction of the acceleration
is ______________ the direction of the velocity.
In a star, the condition of balance between the inward force of gravity and the outward
force of thermal and radiation pressure is known as _______________ equilibrium.
The image of a convex mirror is always virtual, _________, and smaller.
Gravitational potential energy is equal to the ______________ of an object times its
height.
Hydrocarbons that have the composition that satisfies the general formula CnH2ncan be
either alkenes or ______________.
Determine the sidereal period of a planet that is located 5.2 AU from the Sun.
Sugars, starches, and cellulose are all classified as compounds called ______________.
In pushing an object on a level surface, work is done against ______________.
The elements that hardly ever react with other elements to form compounds are called
the ______________.
