Ch. 1 Lessons 3 & 4 Practice

Identify the opposites of selected physical changes: melting, boiling, sublimation.

• freezing, condensation, deposition

• evaporation, melting, sublimation

• boiling, freezing, condensation

• sublimation, deposition, melting

Tags

NGSS.MS-PS1-4

Dissolving is the process of a solute becoming incorporated into a solvent to form a solution. How can boiling reverse the process in the example of salt water?

• By evaporating the water and leaving the salt behind

• By freezing the solution

• By adding more water

• By stirring the solution

Tags

NGSS.MS-PS1-4

Model conservation of mass in a labeled drawing that illustrates a mixture.

• A drawing showing mass being lost

• A drawing showing mass being conserved

• A drawing showing mass being created

• A drawing showing mass being destroyed

Tags

NGSS.MS-PS1-5

Characterize chemical change.

• A process that involves a change in the physical state of a substance.

• A process that results in the formation of new chemical substances.

• A process that involves a change in temperature only.

• A process that does not involve any change in the chemical composition.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Identify some signs of a chemical change.

• Change in color

• Formation of a precipitate

• Change in temperature

• All of the above

Tags

NGSS.MS-PS1-2

Which of the following constitutes proof of a chemical change?

• Change in color

• Formation of a precipitate

• Emission of gas

• All of the above

Tags

NGSS.MS-PS1-2

Order the events that occur in a chemical reaction.

• Reactants collide with each other

• Bonds break in the reactants

• New bonds form to create products

• Energy is released or absorbed

Tags

NGSS.MS-PS1-2

Which of the following best describes the parts of a chemical equation and their usefulness?

• Reactants, products, and the arrow indicating the direction of the reaction; they help in understanding chemical reactions.

• Only the reactants; they are useful for identifying substances involved.

• Only the products; they show the end result of a reaction.

• The arrow only; it indicates the direction of the reaction.

Tags

NGSS.MS-PS1-1