Review/Practice for Exams 3 Part 2

1.      Which material could be represented by the image on the left?

• Diamond

• milk

• oxygen

• wood

1.      Sally pops a helium balloon at a birthday party. What will happen to the particles of helium that were in the balloon?

• The particles will disappear.

• The particles will move together.

• The particles will spread out evenly within the room.

• The particles will stick together and sink to the floor.

1.      Which is NOT true about the particles in a plastic spoon?

• The particles are tightly packed.

• The particles have strong attractive forces.

• The particles slide past each other.

• The particles vibrate in place.

The figure on the left is a model of atoms in a sample at room temperature. Which physical property does this sample have

• a.      It can be poured.

• a.      It can expand to fill its container.

• a.      It cannot be compressed.

• a.      It has a low boiling point.

5.      Which property explains why copper is often used in electric wiring?

• conductivity

• magnetism

• density

• solubility

5.      Which best describes the attractive forces between particles shown in the figure?

• a.      The attractive forces keep the particles vibrating in place.

• a.      The particles hardly are affected by the attractive forces.

• a.      The attractive forces keep the particles close together but still allow the particles to slide past each other.

• a.      There are no attractive forces between the particles and that is why they are held in place.

The block shown above has a mass of 120 g. What is the density of the block?

The formula for density is D=M/V.

• a.    3 g/cm³

• a.     40 g/cm³

• a.      4 g/cm³

• a.      30 g/cm³

5.      Which property would NOT be useful for finding the difference between baking soda and cornstarch?

• Density

• Mass

• Melting point

• Solubility

5.      If a solid were placed in the moon, would its density change?

• a.      No, density is a measure if a mass to volume ratio. Mass does not change between planetary objects.

• a.      No, density is a measure of a weight to volume ratio. Weight does not change between planetary objects.

• a.      Yes, density is a measure of a mass to volume ration. Mass does not change between planetary objects.

• a.      Yes, density is a measure of weight to volume ratio. Weight does change between planetary objects.

The graph below compares the density, in grams per cubic centimeter (g/cm³)  of four different substances. Based on information from the graph, which of the following best compares the physical properties of two of the substances?

• Substance X has less mass than substance Y has.

• Substance W has less volume than substance X has.

• Substance Y would have less mass than substance Z would have if they had the same volume.

• Substance Z would have less mass than substance W would have if they had the same volume.