Lab: Physical and Chemical Changes — Unit test Answers

Ella makes this table to organize her notes on whether atoms gain or lose energy during the changes of state.

Which statement gives two characteristics of all liquids?

Which state(s) of matter have no definite shape or volume?

When a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. Why is the burning of magnesium considered a chemical change?

Which ranks these materials by the attraction between their atoms from the weakest to the strongest?

Which statement describes an extensive property of matter?

During which changes of state do atoms that cannot move past one another become free to move?

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.

Which statement describes a chemical property of water?

A cylinder at left with balls in a layer on the bottom of the cylinder has an arrow leading to a cylinder at right with balls stacked near the bottom of the cylinder.

Four students are analyzing four different substances and recording their findings in this table.Which most describes this table?

Which of these is an example of a physical change?