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