SMA 11 P.1.3, 1.4

Two clear solutions are mixed together in a beaker. Which would most likely indicate a chemical change had occurred?

• separation of the two liquids within the beaker

• increase in volume of the liquid in the beaker

• increase in mass of the liquid in the beaker

• change of color of the liquid in the beaker

Which changes the most in a balloon as it is inflated?

• density

• conductivity

• temperature

• volume

Which indicates a physical change?

• change in state

• release of heat

• formation of a precipitate

• formation of a new substance

Which is an example of a chemical change?

• boiling water

• burning wood

• freezing water

• chopping wood

The process of rusting is related to which property of iron?

• density

• malleability

• chemical reactivity

• electrical conductivity

Baking soda and vinegar are mixed together in a sealed plastic bag. The chemicals bubble and the bag expands. Which conclusion can be made from these observations?

• There was a physical change, and a gas was produced.

• There was a chemical change, and a gas was produced.

• There was a physical change, and a precipitate was formed.

• There was a chemical change, and a precipitate was formed.

Which indicates that an exothermic chemical reaction occurs when two substances are mixed together?

• Bubbles are released.

• white substance is formed

• The mixture decreases in volume.

• the temperature of the mixture rises

When two solutions are combined, which evidence would best indicate a chemical reaction has occurred?

• volume increases

• density decreases

• a precipitate forms

• Temperature remains constant.

During a physical change of matter, which property will not change?

• mass

• state

• volume

• temperature

Which is an example of a physical change within a system?

• baking a cake

• burning a piece of paper

• water turning into steam

• baking soda reacting with vinegar