A) element to element. B) column to column. C) group to group. D) row to row.
A) cooking an egg B) burning wood into charcoal C) rusting iron D) dissolving salt in water
A) bonds. B) movement of the electrons. C) nuclei of the atoms. D) bonds.
A) one atom of chlorine B) two atoms of chlorine C) one atom of oxygen D) two atoms of oxygen
A) tastes sour B) usually reacts with a metal C) changes the color of an indicator D) feels slipperychanges the color of an indicator
A) the use of knowledge to solve problems. B) the use of lenses and microscopes. C) science that uses computers. D) new inventions.
A) protons and neutrons B) valence electrons C) protons D) neutrons
A) testing on odor by directly inhaling the vapor. B) touching hot objects with your bare hands. C) eating or drinking from laboratory glassware. D) tying back long hair and loose clothing.
A) evaporation B) condensation C) freezing
A) atoms with neutral charges B) one atom’s nucleus and another atom’s electrons C) ions with opposite charges
A) formation of a precipitate B) change in color C) production of a gas D) change in shape
A) planets orbiting the sun. B) light energy in a vacuum. C) was a vibrating string.
A) a colloid. B) a solution. C) a suspension.
A) particles that make up a substance move. B) bonds between atoms break down.
A) gamma decay B) beta decay C) alpha decay
A) the number of neutrons in the nucleus B) the number of protons in the nucleus C) the number of electrons in outermost energy level
A) chemical change B) physical change.
A) 1.23 m. B) 12.3 m. C) 0.123 m.
A) decreases B) increases C) does not change
A) They are extremely nonreactive. B) The are located in the left-most column of the periodic table in group I. C) They are usually gases.
A) sublimation B) condensation C) melting
A) gold. B) hydrogen. C) table salt. D) water.
A) iron ions with a + 2 charge B) iron ions with a + 11 charge
A) on the right side B) in the bottom rows C) on the left-most side
A) gas B) solid C) liquid
A) not uniform throughout.(this means it IS NOT the same) B) uniform throughout. ( this means it IS the same)
A) chemical bonds B) physical bonds C) electric currents
A) melting B) freezing C) boiling
A) water boiling B) water breaking down into hydrogen and oxygen C) ice being carved
A) liquid B) gas C) solid
A) their outermost energy level is full with 8 electrons B) their outermost energy level is full with 4 electrons
A) protons. B) electrons plus the number of neutrons C) protons plus the number of neutrons.
A) hypothesis B) conclusion C) scientific method.
A) Kelvin. B) mole. C) ampere.
A) oxygen (O) and calcium (Ca) B) helium (He) and copper (Cu) C) iron (Fe) and potassium (K)
A) cold water B) hot water C) warm water
A) can be seen and touched. B) can be weighted. C) has mass and takes up space.
A) Never do experiments that involve flames or hot objects. B) Always follow your teacher’s instructions and textbook directions exactly. C) Never work with chemicals.
A) two carbon atoms. B) two oxygen atoms.
A) +1 B) -1 C) 0
A) viscosity. B) energy. C) pressure.
A) is created B) is destroyed C) is absorbed D) is released
A) milk B) carbon dioxide C) oxygen D) water
A) tremendous amounts of mass. B) very small amounts of mass.
A) drawing conclusions. B) doing experiments. C) formulating questions.
A) must still be tested by experiments. B) has been tested by many observations. C) that can never be changed.
A) transfer of electrons between metals and nonmetals. B) sharing of electrons between two nonmetals. C) transfer of neutrons between two metals.
A) doing experiments. B) designing models. C) drawing conclusions.
A) eight neutrons in its nucleus. B) eight protons in its nucleus C) a total of eight neutrons and electrons. |