Natural Science (Practice Questions)
Which of the following would cause a high angle of reflection of a light wave?
(a) high angle of incidence of the wave
(b) a low angle of incidence of the wave
(c) a wave that travels through a medium of higher density
(d) a wave with a very short wavelength - Answer -(a) a high angle of incidence of the
wave
What term is used to describe two waves that are out of phase as they come together to
produce a new wave?
(a) incomplete interference
(b) distorted interference
(c) constructive interference
(d) destructive interference - Answer -(d) destructive inference
What would happen to light waves if they hit a convex lens?
(a) they will be refracted and converge
(b) they will be refracted and diverge
(c) they will be reflected and converge
(d) they will be reflected and diverged - Answer -(a) they will be refracted and converge
If an astronomer observing the stars detects a blue shift, what could he conclude?
(a) the star is moving farther away from him
(b) the star is moving closer or toward him
(c) the star is cooling down and becoming smaller
(d) the star is heating up and becoming larger - Answer -(b) the star is moving closer
toward him
Salts are made from a combination of what two types of elements?
(a) a metal and nonmetal
(b) a nonmetal and an alkaline earth metal
,(c) a cation from a base and an anion from an acid
(d) a metal and a halogen - Answer -(a) a metal and nonmetal
What group of the periodic table makes up the alkaline earth metals?
(a) group 1
(b) group 2
(c) group 13
(d) group 17 - Answer -(b) group 2
Which of the following elements is not a notable gas?
(a) neon
(b) argon
(c) astatine
(d) krypton - Answer -(c) astatine
If an atom has a neutral charge, what must be true of them?
(a) the nucleus contains only neutrons and no protons
(b) the atomic mass is equal to the number of neutrons
(c) the atomic number is equal to the number of neutrons
(d) the atomic number is equal to the number of electrons - Answer -(d) the atomic
number is equal to the number of electrons
Most organic molecules have all of the following properties except:
(a) high solubility in water
(b) tendency to melt
(c) covalently bonded
(d) high flammability - Answer -(a) high solubility in water
In a single replacement reaction, what products could result from these reactants in the
following chemical equation? 2Al + Fe2 O3 ---->
(a) AlO3 + Fe2
(b) 2Fe2 + 2AlO3
(c) Al2O3 + 2Fe
(d) 2AlFeO3 - Answer -(c) Al2O3 + 2Fe
What type of compound is formed by the combination of two or more non-metallic
elements with one another?
(a) organic
(b) ionic
(c) covalent
, (d) chemical - Answer -(c) covalent
Which of the following descriptions of Lewis dot structure is NOT correct?
(a) they show the bonding between atoms of a molecule
(b) they they show all the electrons of each atom of a molecule
(c) the total number of electrons is equal to the sum of the number of valance electrons
on each atom
(d) they show any lone pairs of electrons that may exist in a molecule that are not
bonded to another atom - Answer -(b) they they show all the electrons of each atom of a
molecule
Which of the following does NOT describe a carboxyl group correctly?
(a) a carbon atom attached to an oxygen atom by a double bond and to a hydroxyl
group by a single bond.
(b) a carbonyl group bonded to a hydroxyl group.
(c) a set of four atoms bonded together and abbreviated as C02H.
(d) a carbon atom attached to a hydrogen atom by a double bond and to an oxygen
atom by a double bond. - Answer -(d) a carbon atom attached to a hydrogen atom by a
double bond and to an oxygen atom by a double bond.
A gas is held in a closed container and held at constant temperature. What is the effect
of increasing the volume of the container by 3 times?
(a) the pressure is tripled
(b) the pressure increases to one third
(c) the pressure decreases to one third
(d) the pressure remains constant - Answer -(c) the pressure decreases to one third
Use the following information to answer question.
Four identical liquid samples inside of identical sealed containers initially at room
temperature were placed in four isolated environments, each with its own maintained
temperature. After each liquid sample is allowed sufficient time to assume the
temperature of its environment, the samples changed as follows: In sample A, the liquid
vaporizes and is now a gas. In sample B, the liquid is boiling. In sample C, the liquid is
now a solid. In sample D, the liquid remains as a liquid.
Which sample's container has the greatest pressure?
(a) sample A
(b) sample B
(c) sample C
(d) sample D - Answer -(a) sample A
Which of the following would cause a high angle of reflection of a light wave?
(a) high angle of incidence of the wave
(b) a low angle of incidence of the wave
(c) a wave that travels through a medium of higher density
(d) a wave with a very short wavelength - Answer -(a) a high angle of incidence of the
wave
What term is used to describe two waves that are out of phase as they come together to
produce a new wave?
(a) incomplete interference
(b) distorted interference
(c) constructive interference
(d) destructive interference - Answer -(d) destructive inference
What would happen to light waves if they hit a convex lens?
(a) they will be refracted and converge
(b) they will be refracted and diverge
(c) they will be reflected and converge
(d) they will be reflected and diverged - Answer -(a) they will be refracted and converge
If an astronomer observing the stars detects a blue shift, what could he conclude?
(a) the star is moving farther away from him
(b) the star is moving closer or toward him
(c) the star is cooling down and becoming smaller
(d) the star is heating up and becoming larger - Answer -(b) the star is moving closer
toward him
Salts are made from a combination of what two types of elements?
(a) a metal and nonmetal
(b) a nonmetal and an alkaline earth metal
,(c) a cation from a base and an anion from an acid
(d) a metal and a halogen - Answer -(a) a metal and nonmetal
What group of the periodic table makes up the alkaline earth metals?
(a) group 1
(b) group 2
(c) group 13
(d) group 17 - Answer -(b) group 2
Which of the following elements is not a notable gas?
(a) neon
(b) argon
(c) astatine
(d) krypton - Answer -(c) astatine
If an atom has a neutral charge, what must be true of them?
(a) the nucleus contains only neutrons and no protons
(b) the atomic mass is equal to the number of neutrons
(c) the atomic number is equal to the number of neutrons
(d) the atomic number is equal to the number of electrons - Answer -(d) the atomic
number is equal to the number of electrons
Most organic molecules have all of the following properties except:
(a) high solubility in water
(b) tendency to melt
(c) covalently bonded
(d) high flammability - Answer -(a) high solubility in water
In a single replacement reaction, what products could result from these reactants in the
following chemical equation? 2Al + Fe2 O3 ---->
(a) AlO3 + Fe2
(b) 2Fe2 + 2AlO3
(c) Al2O3 + 2Fe
(d) 2AlFeO3 - Answer -(c) Al2O3 + 2Fe
What type of compound is formed by the combination of two or more non-metallic
elements with one another?
(a) organic
(b) ionic
(c) covalent
, (d) chemical - Answer -(c) covalent
Which of the following descriptions of Lewis dot structure is NOT correct?
(a) they show the bonding between atoms of a molecule
(b) they they show all the electrons of each atom of a molecule
(c) the total number of electrons is equal to the sum of the number of valance electrons
on each atom
(d) they show any lone pairs of electrons that may exist in a molecule that are not
bonded to another atom - Answer -(b) they they show all the electrons of each atom of a
molecule
Which of the following does NOT describe a carboxyl group correctly?
(a) a carbon atom attached to an oxygen atom by a double bond and to a hydroxyl
group by a single bond.
(b) a carbonyl group bonded to a hydroxyl group.
(c) a set of four atoms bonded together and abbreviated as C02H.
(d) a carbon atom attached to a hydrogen atom by a double bond and to an oxygen
atom by a double bond. - Answer -(d) a carbon atom attached to a hydrogen atom by a
double bond and to an oxygen atom by a double bond.
A gas is held in a closed container and held at constant temperature. What is the effect
of increasing the volume of the container by 3 times?
(a) the pressure is tripled
(b) the pressure increases to one third
(c) the pressure decreases to one third
(d) the pressure remains constant - Answer -(c) the pressure decreases to one third
Use the following information to answer question.
Four identical liquid samples inside of identical sealed containers initially at room
temperature were placed in four isolated environments, each with its own maintained
temperature. After each liquid sample is allowed sufficient time to assume the
temperature of its environment, the samples changed as follows: In sample A, the liquid
vaporizes and is now a gas. In sample B, the liquid is boiling. In sample C, the liquid is
now a solid. In sample D, the liquid remains as a liquid.
Which sample's container has the greatest pressure?
(a) sample A
(b) sample B
(c) sample C
(d) sample D - Answer -(a) sample A
