P HYSICAL P ROPERTY characteristics of matter that can be observed WITHOUT changing the nature (make-up) of the substance

P HYSICAL P ROPERTIES Density Color Conductivity Mass Malleability Ductility Viscosity

P HYSICAL P ROPERTIES : C OPPER What are some physical properties of the copper strip? How can we physically change the copper strip?

C HEMICAL P ROPERTY characteristics of matter that can be observed only when there is a change in the composition of a substance.

C HEMICAL P ROPERTIES : C OPPER What do you notice about the second copper strip? Is it still copper? Yes and no! It is copper that has reacted with weak acids and is now covered with copper chloride and copper sulfate Reactivity with an acid is a CHEMICAL PROPERTY. In order to witness copper’s REACTIVITY WITH AN ACID, the chemical makeup of the copper had to be changed. No longer just a copper sheet!

D ENSITY the amount of matter (mass) in a given unit volume.

V ISCOSITY Viscosity refers to the resistance to flow of a fluid (“thickness”)

V ISCOSITY VS. D ENSITY ?! I have oil and water… How can I determine which is denser? Does this mean that the water is also more viscous? Let’s have a race! Two volunteers, 20 mL of each liquid, a funnel and a flask will be needed to complete this race. What is the difference between viscosity and density?

CHEMICAL CHANGE : the change of one or more substances into other substances D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

CHEMICAL PROPERTY : a property that can be observed only when there is a change in the composition of a substance D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

CHEMICAL REACTION : another term for chemical change D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

COMPOUND : a chemical combination of two or more different elements joined together in a fixed proportion D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

DENSITY : the amount of matter (mass) in a given unit volume D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

ELEMENT : a substance that cannot be broken down into simpler substances D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

MASS : the measure of the amount of matter an object contains D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

MATTER : anything that takes up space and has mass D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

MIXTURE : a combination of two or more substances in which the basic identity of each substance is not changed D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

PHYSICAL CHANGE : a change in matter where its identity does not change D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

PHYSICAL PROPERTY : a characteristic of matter that is exhibited without a change of identity D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

PROPERTY : the characteristics of matter; how it behaves D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

SOLUTION : a mixture that is the same throughout, or homogeneous D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

VOLATILE : description of a substance that easily changes to a gas at room temperature D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

VISCOSITY : the resistance of a liquid to flow ( viscous ) D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

BUOYANCY : The tendency or capacity to remain afloat in A liquid or rise in air or gas; the upward force that A fluid exerts on an object less dense than itself D EFINE ( IN YOUR OWN WORDS ): _______________________________________________ _______________________________________________ _______________________________________________ D RAW :

Students in a chemistry lab measure the time it takes four different 100 mL solutions to pass through a hole in the bottom of a cup. Which of the following properties of the solutions is most likely being measured? (Apr'06 10th -22) A.Buoyancy B.Mass C.Viscosity D.Volume

ANS:C

The picture shows the results of pouring a blue liquid into a clear liquid and allowing the mixture to settle for 25 minutes. Compared to the clear liquid, the blue liquid is more _____. (Apr'06 11th -1) A.massive B.dense C.viscous D.soluble

ANS: B

Today, the observation that an air bubble in water rises to the surface is explained by the principle of _____. (Fall'05 11th - 19) A.viscosity B.buoyancy C.interference D.polarity

ANS: B

Brown sugar consists of crystals of white sugar coated with molasses. If brown sugar hardens, it can be softened by heating. The most likely reason brown sugar softens when heated is that heat _____. (Fall'05 11th -25) A.increases the moisture of sugar B.decreases the volume of molasses C.increases the density of sugar D.decreases the viscosity of molasses

ANS: D

As the viscosity of a liquid increases, the liquid _____. (Feb'06 11th -25 and Jul'06 11th - 38) A.conducts electricity B.pours more slowly C.evaporates more quickly D.forms a precipitate

ANS: B

Swimmers find that they can float more easily in the ocean than in a freshwater pond. The most likely reason for this phenomenon is that the _____. A.viscosity of pond water is greater than that of ocean water B.density of ocean water is higher than that of pond water C.temperature of pond water is lower than that of ocean water D.mass of ocean water is greater than that of pond water

ANS: B

The buoyant force that a fluid exerts on objects is increased when there is an increase in the fluid’s _____. (Jul'06 11th -25) A.acidity B.clarity C.solubility D.density

ANS: D

According to this information, Block Z is most likely composed of _____. A.balsa B.ebony C.maple D.poplar

ANS: A

A bar of soap produced by this soap-making process normally sinks to the bottom of a container of water. Which of these processes could cause the bar of soap to float in water? (Oct'05 11th -43) A.Making grooves in the surface of the thick paste B.Adding air bubbles to the thick paste C.Letting the thick paste sit for four days D.Chilling the mold filled with the thick paste

ANS: B