Standard S8P1-D and E Review Chapter 2- Sections 2 and 3

Standard S8P1-D and E Review Chapter 2- Sections 2 and 3

Multiple Choice

Identify the choice that best completes the statement or answers the question.

____1.Which of the following is NOT an example of a physical change?

a. / the shaping of a gold bar / c. / the explosion of fireworks
b. / the melting of a Popsicle / d. / the sanding of a piece of wood

____2.Why are chemical properties harder to observe than physical properties?

a. / Chemical properties change the substance’s identity.
b. / Chemical properties depend on the size of the sample.
c. / Physical properties can be observed and measured.
d. / Physical properties change the identity of a substance.

____3.What is the best way to tell if a chemical change has taken place?

a. / The matter changes color. / c. / A mixture separates into layers.
b. / The change is reversible. / d. / A composition changes.

____4.Melting crayons is an example of a

a. / physical property. / c. / chemical property.
b. / physical change. / d. / chemical change.

____5.Which of the following events is NOT a common sign that a chemical change has taken place?

a. / change in color or odor / c. / foaming or bubbling
b. / change in state / d. / production of heat or light

____6.What chemical property is responsible for iron rusting?

a. / flammability / c. / nonflammability
b. / conductivity / d. / reactivity with oxygen

____7.Which physical property of matter describes the relationship between mass and volume?

a. / density / c. / reactivity
b. / ductility / d. / weight

____8.Souring milk is an example of a

a. / physical property. / c. / chemical property.
b. / physical change. / d. / chemical change.

____9.Malleability is an example of a

a. / physical property. / c. / chemical property.
b. / physical change. / d. / chemical change.

____10.During physical changes, matter always retains its

a. / size. / c. / state.
b. / identity. / d. / texture.

____11.How does a physical change differ from a chemical change?

a. / New properties of the matter are observed.
b. / New materials are produced.
c. / The change always involves heat or light.
d. / The composition of the matter is unchanged.

____12.Why is freezing water to make ice considered a physical change?

a. / The ice has some new properties. / c. / The water changes its state.
b. / The ice floats on water. / d. / The water changes its identity

____13.Why would dissolving salt in water be considered a physical change?

a. / The salt disappears forever.
b. / The water tastes salty.
c. / The salt changes its state.
d. / The salt returns if the mixture is heated.

____14.What makes chemical properties so difficult to observe?

a. / They result in changes of state.
b. / Observing them produces new materials.
c. / Wearing protective glasses is required.
d. / They happen too quickly

____15.Boiling point, melting point, and density are some of an element’s

a. / nonreactive properties. / c. / chemical properties.
b. / physical properties. / d. / pure properties.

____16.The physical properties of compounds do NOT include

a. / melting point. / c. / reaction to light.
b. / density. / d. / color.

____17.The flammability of a substance is

a. / a chemical property. / c. / a physical property.
b. / related to the density. / d. / changeable.

____18.Which of the following is a chemical property?

a. / density / c. / boiling point
b. / reactivity with acid / d. / color

Concepts to know for Quiz on Friday:

1. Physical Property- Examples-density, melting point, boiling point etc…..
2. Chemical Properties-Examples- reactivity, combustibility-flammability
3. Physical Change-Examples
4. Chemical Change-examples
5. What is a precipitate?
6. List signs of a chemical reaction leading to a chemical change in matter.