Changes in Matter Answers

A student investigated some properties of lead and recorded the findings in the table below.PropertyObservationcolordull graydensity11.3 g/cm3volume of sample3.00 cm3melting point327°Creaction with airlead oxide forms on the surfaceelectrical conductivityconducts some electricityWhich statement is true with respect to the investigation?

Which procedure could a student use to examine an intensive property of a rectangular block of wood?

Which list includes only physical properties?

Which of these is an example of investigating an intensive property?

Which is an intensive property of a substance?

The table below shows the freezing points of four substances.SubstanceFreezing point (°C)benzene5.50water0.00butane–138nitrogen–210.The substances are placed in separate containers at room temperature, and each container is gradually cooled. Which of these substances will solidify before the temperature reaches 0°C?

Which of these is an example of a physical change?

To observe a chemicalphysicalelectricalthermal property of a substance, the substance must interact with another substance, such as when gasoline burns or when sodium metal reacts with water.

Which term refers to a property that depends only on the amount of a substance?

Which statement describes a physical property of copper?

The table below shows the freezing points of four substances.SubstanceFreezing point (°C)benzene5.50water0.00butane–138nitrogen–210.The substances are placed in separate containers at room temperature, and each container is gradually cooled. Which of these substances will solidify before the temperature reaches 0°C?

A geochemist examines a piece of metal that he found in the soil. He performs tests to identify the metal from its density, electrical conductivity, and melting point. Which statement best describes his investigation?

A student investigated some properties of lead and recorded the findings in the table below.PropertyObservationcolordull graydensity11.3 g/cm3volume of sample3.00 cm3melting point327°Creaction with airlead oxide forms on the surfaceelectrical conductivityconducts some electricityWhich statement is true with respect to the investigation?

Which is an intensive property of a substance?

Which is an example of a chemical change?

Which of these is an example of a physical change?

Which statement describes a physical property of copper?

A scientist observes that the electrical resistance of a superconducting material drops to zero when the material is cooled to very low temperatures. Which of the following statements best describes what the scientist is observing?