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