Properties and Changes of Matter: Mastery Test

Select the correct answer. Which type of property can be observed only by changing a substance into a different substance?

• intensive property

• extensive property

• physical property

• chemical property

Select all the correct answers. A scientist carried out several different procedures, each of which caused a change in matter. Select each procedure that is likely a chemical change.

• Salt crystals were crushed into a fine powder.

• Bubbles were produced when iron was placed in acid.

• Two liquids were combined, and a solid appeared.

• A piece of metal melted when it was heated.

• A white substance turned blue when water was added.

Select the correct answer. In an experiment, Lydia added 50 grams of sugar to 200 milliliters of water. She stirred the mixture, and the sugar eventually dissolved into the water and couldn’t be seen. The volume of the solution increased, but there was no noticeable change in color, odor, or temperature. Which statement best describes what happened in Lydia’s experiment?

• A physical change took place during this experiment.

• A chemical change took place during this experiment.

• A compound was formed during this experiment.

• A heterogeneous mixture was formed during this experiment.

Select the correct answer. A student places a sample of white sodium bicarbonate powder in a test tube and heats it. The student observes that the sodium bicarbonate undergoes a chemical change. After the change, what must be true about the substance in the test tube?

• It is not white.

• It is a liquid.

• It is an element.

• It is not sodium bicarbonate.

Select the correct answer. A 46.9 gram sample of a substance has a volume of about 3.5 centimeters³. It is solid at a room temperature of 23°C. Out of the four substances whose properties are given, which is the most likely identity of this substance?

• molybdenum

• mercury

• hafnium

• lead