# Properties And Composition Of Matter Unit Test: Question Preview (ID: 27443)

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 In what way are atoms of oxygen most different from atoms of nitrogen? a) They have different temperatures b) They have different states of matter c) They have different masses d) They have different colors A student has two pieces of aluminum foil. Each piece can be folded and rolled into a wire. Why do both pieces of aluminum foil behave the same way? a) They are composed of the same types of atoms b) They are composed of different types of atoms c) They have the same physical properties but different chemical properties d) They have the same chemical properties but different physical properties Which is true of every atom of an element? a) It can be seen with a magnifying glass b) It is joined together with another atom c) It has mass and volume d) It is weightless How does 250 ml of water compare to 500 ml? a) They have the same melting point but different boiling points b) They have the same boiling point but different melting points c) They have the same volume but different densities d) They have the same density but different volumes How does the density of a 4-g sample of copper compare to that of a 12-g sample of copper? a) Its density is one half the density of the 12-g sample b) Its density is the same density as the 12-g sample c) Its density is twice the density of the 12-g sample d) Its density is three times the density of the 12-g sample Which statement accuractely compares the melting point of 50 grams of an element to 100 grams of the same element? a) The melting point for each element would double because the mass was changed b) The melting point for each element would decrease by half because the mass was changed c) The melting process would occur more quickly at 50 grams, but the melting point would remain the same d) The melting process would occur more quickly but the melting point would decrease by half In which situation would the atoms of an object begin to move closer together during a phase change? a) Heat is removed as a gas turns into a liquid b) Heat is removed as a liquid turns into a gas c) Heat is added as a solid turns into a gas d) Heat is added as liquid turns into a solid How are the atoms in an object affected when the temperature of the object increases? a) They join together b) They vibrate faster c) They vibrate slower d) They split apart Which is composed of matter? a) electricity b) an atom c) light d) heat Which is true when comparing two pure iron magnets? a) They contain different types of atoms but the same elements b) They contain the same types of atoms but different elements c) They contain the same types of atoms and elements d) They contain different types of atoms and elements
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