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 - ANS(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 - ANS(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 - ANS(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 - ANS(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 - ANS(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 - ANS(b) group 2
Which of the following elements is not a notable gas?
(a) neon
(b) argon
(c) astatine
(d) krypton - ANS(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 - ANS(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 - ANS(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 - ANS(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 - ANS(c) covalent
Which of the following descriptions of Lewis dot structure is NOT correct?
(a) they show the bonding between atoms of a molecule
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 - ANS(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 - ANS(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 - ANS(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 - ANS(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 - ANS(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 - ANS(b) group 2
Which of the following elements is not a notable gas?
(a) neon
(b) argon
(c) astatine
(d) krypton - ANS(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 - ANS(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 - ANS(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 - ANS(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 - ANS(c) covalent
Which of the following descriptions of Lewis dot structure is NOT correct?
(a) they show the bonding between atoms of a molecule
