Concept Practice - Matter

Which physical property is used to identify the ability to dissolve?

A student makes a table to classify substances as solids, liquids, or gases. The student's table is shown below.

How many substances listed can be classified as solids, liquids, or gases?

Which method could be used to classify objects by the property of density?

A student conducts an investigation to learn how materials conduct energy. The student places a wooden spoon and a metal spoon in identical, separate containers of hot water. Then the student takes the temperature of the water in each container to make sure both are the same temperature. What is the variable in the student's investigation?