AnswersAA-F26 Physical ScienceCumulative Exam

Cumulative Exam — Cumulative exam Answers

2 verified answers
1
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When a hammer strikes a compound formed by covalent bonds, what will most likely happen to the compound?

A
It will break into many pieces.
B
It will reform into a new shape.
C
It will spread out and then return to its original shape.
D
It will stay solid and resist the force of the hammer.
2
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Natalia began to draw a diagram to compare bases and acids.

Question illustration
A
conducts electric current
B
produces OH– ions
C
tastes sour
D
reacts with carbonates
3

Based on its location on the periodic table, which metal is likely to be less reactive than both strontium and sodium?

A
magnesium (Mg)
B
barium (Ba)
C
cesium (Cs)
D
rubidium (Rb)
4

When ammonium chloride and water interact, less energy is released from breaking the bonds in the water and ammonium chloride than what is required to form the bonds of the new substance.

A
An endothermic reaction is occurring.
B
An exothermic reaction is occurring.
C
Energy is being released into the surroundings.
D
Energy escapes as light into the surroundings.
5

What is produced when calcium reacts with fluorine in a synthesis reaction?Ca + F2 ________

Question illustration
A
CaF
B
CaF4
C
2CaF
D
CaF2
6

This is how platinum appears in the periodic table.

Question illustration
A
78
B
117
C
195
D
273
7

Which is an example of negative acceleration?

A
a snowboarder who increases speed when traveling downhill
B
a biker who maintains a constant speed through a race
C
a skateboarder who reduces speed when moving up a hill
D
a runner who fluctuates speed by increasing and decreasing speed
8

Which best compares and contrasts how John Newlands and Dmitri Mendeleev organized elements?

A
Both Newlands and Mendeleev arranged elements according to their chemical properties, but only Newlands used atomic mass as well.
B
Both Newlands and Mendeleev arranged elements according to their atomic masses, but only Mendeleev used chemical properties as well.
C
Both Newlands and Mendeleev organized elements into groups, but only Newlands used a table with rows and columns.
D
Both Newlands and Mendeleev organized elements into a table with rows and columns, but only Mendeleev named different groups of elements.
9

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration?

A
negative acceleration of 4 m/s2
B
positive acceleration of 4 m/s2
C
positive acceleration of 9 m/s2
D
negative acceleration of 9 m/s2
10

At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line.

Question illustration
A
4
B
6
C
10
D
14
11

Which is a mixture?

A
sodium metal
B
chlorine gas
C
sodium metal and chlorine gas
D
sodium chloride (salt) and water
12

Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are the positive ions in each compound.

A
sodium, calcium, and barium
B
barium, sulfur, and oxygen
C
calcium, barium, and chlorine
D
chlorine, sulfur, and oxygen
13

Which most likely indicates a chemical change has occurred?

A
a solid substance becoming larger
B
a solid melting and becoming a liquid
C
a green liquid becoming a red liquid
D
a liquid freezing and becoming a solid
14

Zac releases the air from a balloon. Which statement best describes what will happen to the air that was inside the balloon?

A
It will become more compacted.
B
It will remain the shape of the balloon but not the size.
C
It will remain the size of the balloon but not the shape.
D
It will expand to fill the room.
15

Lava is rock that has undergone a physical change and has liquefied. What is known about this change?

A
The lava gained mass.
B
The lava was burned into smoke.
C
The lava can cool back into rock.
D
The lava lost mass.
16

Which type of reaction is C12H22O11 → 12C + 11H2O?

A
synthesis
B
decomposition
C
oxidation
D
combustion
17

How would an electron shell model of an oxygen atom (O) appear after the atom has formed chemical bonds?

A
It would have six electrons in the outermost shell.
B
It would have six electrons in the innermost shell.
C
It would have eight electrons in the outermost shell.
D
It would have eight electrons in the innermost shell.
18

Which statement best describes the equation CaCO3 + 2HCl → CaCl2 + CO2 + H2O?

A
CaCO3 is a reactant; it is present before the reaction occurs.
B
CaCl2 is a reactant; it is present before the reaction occurs.
C
CO2 is a reactant because it is most likely a gas.
D
H2O is a reactant because it is most likely a liquid.
19

What did Thomson’s model of the atom include that Dalton’s model did not have?

A
a nucleus
B
energy levels
C
electron clouds
D
smaller particles
20

What is the chemical name of SiF4?

A
sulfur fluoride
B
silicon fluoride
C
sulfur tetrafluoride
D
silicon tetrafluoride

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