AnswersAA-F26 Physical ScienceLab: Motion

Lab: Motion — Cumulative exam Answers

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Which practice poses the greatest safety concern?

A
talking to others in the lab
B
accumulating clutter on the lab bench
C
performing an experiment when sitting down
D
reading the temperature of a water bath
2
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Water is called the “universal solvent.” Which statement best explains this description with respect to ionic compounds?

A
Water can dissociate all ionic compounds through ion-dipole interactions.
B
Water can hydrate many ionic compounds through hydrogen-bonding interactions.
C
Water can dissociate many ionic compounds through ion-dipole interactions.
D
Water can hydrate many ionic compounds through dipole-dipole interactions.
3

Which is most likely true about water in chemical systems?

A
Water dissolves nonpolar ionic compounds.
B
Water dissociates ionic compounds.
C
Water dissociates covalent molecules.
D
Water dissolves nonpolar covalent substances.
4

Which statement best describes the difference between endothermic and exothermic reactions?

A
They are opposites because endothermic reactions require energy and exothermic reactions release energy.
B
They are opposites because endothermic reactions release energy and exothermic reactions require energy.
C
They the same because they are both ways of forming precipitates.
D
They the same because they are both ways of forming gasses.
5

Which metal is most likely to form more than one kind of positively charged ion?

A
sodium (Na)
B
barium (Ba)
C
nickel (Ni)
D
magnesium (Mg)
6

Which describes the polarity in a water molecule?

A
partial negative charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
B
partial negative charge on the oxygen atom because it pulls electrons from the hydrogen atoms
C
partial positive charge on the oxygen atom because it pulls electrons from the hydrogen atoms
D
partial positive charge on the oxygen atom because its electrons are pulled toward the hydrogen atoms
7

Which is the property of nonmetals to evaporate easily?

A
brittle
B
dense
C
liquid
D
volatile
8

Fred has a large piece of sugar that is not dissolving in his drink. How could he get the sugar chunk to dissolve faster?

A
by placing it in the refrigerator
B
by breaking it up into smaller pieces
C
by letting it dissolve naturally without agitation
D
by adding a larger piece so the smaller one will dissolve
9

Zora wants to dissolve a solute in a solvent quickly. Which best describes what she should do?

A
decrease the pressure
B
decrease the surface area
C
shake it repeatedly
D
place in a refrigerator
10

The diagram shows organisms a diver observed during an ocean dive.

Question illustration
A
the ocean surface
B
the ocean floor
C
the position of the clownfish
D
the position of the seaweed
11

Which statement describes the location of most metalloids on the periodic table?

A
The metalloids are located below metals and above nonmetals within a group.
B
The metalloids are located below nonmetals and above metals within a group.
C
The metalloids are located to the right of nonmetals and to the right of metals within a period.
D
The metalloids are located to the left of nonmetals and to the left of metals within a period.
12

Rolf prepares four solutions using different solutes as shown in the table below.Which solution is unsaturated?

Question illustration
A
Solution A
B
Solution B
C
Solution C
D
Solution D
13

Lionel has a hot plate, a thermometer, a container of water, a spoon, and a small hammer. Using these tools, Lionel can test several properties of an ionic compound.Which property of the compound will he not be able to test?

A
atomic structure
B
melting point
C
ability to dissolve
D
brittleness
14

Which type of reaction is Mg + S → MgS?

A
polymerization
B
synthesis
C
replacement
D
decomposition
15

Which instrument is best suited for measuring the dimensions of a shoebox?

A
a triple-beam balance
B
a volumetric flask
C
a ruler
D
a caliper
16

The diagram shows Ned’s movement as he left his house and traveled to different places throughout the day.Which reference point should be used to find out how far Ned traveled when he went from the pet store to the swimming pool?

Question illustration
A
V
B
W
C
X
D
Z
17

Which separation procedure is most likely to happen?

A
Freezing a compound will break it down into elements.
B
Filtering a mixture will separate it into substances.
C
Boiling a pure substance will separate it into mixtures.
D
Melting an element will break it down into compounds.
18

What is determined by calculating the slope of the position vs time graph?

A
position
B
velocity
C
distance
D
displacement
19

Which statement describes an extensive property of matter?

A
It changes with the color of a substance.
B
It changes when a new substance is formed.
C
It changes with the amount of sample that is present.
D
It changes with the composition of a substance.
20

Which best explains why water has a much higher boiling point than would otherwise be predicted?

A
Water forms weak hydrogen bonds.
B
Water forms strong hydrogen bonds.
C
Water has weak cohesive forces.
D
Water has strong adhesive forces.

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