AnswersGA-GSE Physical Science AChemical Properties

Chemical Properties Answers

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A scientist is examining an unknown solid. Which procedure would most likely help determine a chemical property of the substance?

A
heating it to find the temperature at which it melts
B
exposing it to a flame to see if it catches on fire
C
hitting it with a hammer to determine if it breaks or bends
D
placing it in water to find out whether or not it dissolves
2
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Which laboratory activity involves a chemical change?

A
leaving a copper penny in vinegar until it turns green
B
boiling saltwater for several minutes until only solid salt remains
C
extracting iron filings from a sand mixture using a magnet
D
crushing a rock with a hammer to extract mineral deposits
3

In a science lab, Cash mixes two clear liquids together in a beaker. Bubbles are produced, and a white solid forms and settles to the bottom. He plans to heat the beaker over low heat and make more observations.

A
A physical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids.
B
A physical change occurred, so even if Cash heats it, the white solid will remain.
C
A chemical change occurred, so if Cash heats it, the white solid will dissolve to form the original mixture of clear liquids.
D
A chemical change occurred, so even if Cash heats it, the white solid will remain.
4

Jenna took an open bowl of leftover mashed potatoes from the refrigerator and noticed a difference in smell. She determined that chemical changes occurred since the potatoes were first placed there.

A
a change of odor
B
a decrease in temperature
C
a change in moisture content
D
a decrease in mass
5

Which use of iron is due to its chemical properties?

A
producing colored sparks in fireworks
B
changing from liquid to gas at 2,862°C
C
conducting electricity and heat
D
changing from solid to liquid if heated to 1,538°C
6

most likely

A
Ar
C
Ca
F
F
N
Ni
7

Which example illustrates a chemical change?

s
shredding paper
s
smashing a soda can
b
burning wood
c
chopping wood
8

best

T
The atoms in hydrogen peroxide are breaking apart and forming new types of molecules.
T
The atoms in hydrogen peroxide are breaking apart and recombining into the original molecules.
T
The molecules of hydrogen peroxide remain intact as new types of molecules form and move out of the liquid.
T
The molecules of hydrogen peroxide remain intact but move more quickly to allow evaporation.
9

The model below shows an atom of an element.

Question illustration
6
6
8
8
9
9
1
16
10

Why is matter so diverse in its properties and characteristics?

D
Different combinations of various atoms result in a wide range of matter.
W
When atoms are split, new matter will be created.
M
Matter consists of various atoms that are chemically identical.
T
The size of atoms in matter depends on their temperature.
11

What is conserved in physical changes?

s
shape
e
energy
m
mass
d
density
12

What happens to the total mass of a substance undergoing a physical change?

I
It stays the same.
I
It doubles.
I
It triples.
I
It is reduced.
13

Which ranks these materials by the attraction between their atoms from the weakest to the strongest?

o
oxygen gas, liquid water, liquid honey, solid iron ore
l
liquid water, liquid honey, oxygen gas, solid iron ore
s
solid iron ore, liquid honey, liquid water, oxygen gas
o
oxygen gas, liquid honey, liquid water, solid iron ore
14

Marco wants to investigate the chemical properties of sodium bicarbonate, or baking soda. He plans to carry out the tests below.Test 1: Mix a teaspoon of sodium bicarbonate into a cup of warm water to see if it dissolves.Test 2: Mix a teaspoon of sodium bicarbonate into a cup of vinegar to see if it fizzes.Test 3: Heat a teaspoon of sodium bicarbonate in the oven to see if its melting point is less than 400 degrees Fahrenheit.

O
Only Test 3 will indicate a chemical property of sodium bicarbonate. Tests 1 and 2 will show a physical property of the substance.
O
Only tests 1 and 2 will indicate chemical properties of sodium bicarbonate. Test 3 will show a physical property of the substance.
O
Only Test 2 will indicate a chemical property of sodium bicarbonate. Tests 1 and 3 will show a physical property of the substance.
O
Only tests 1 and 3 will indicate chemical properties of sodium bicarbonate. Test 2 will show a physical property of the substance.
15

An amount of nitrogen undergoes a physical change and increases its volume. What can be known about this physical change?

T
The boiling point of the nitrogen increased.
T
The mass of nitrogen increased.
T
The color changed.
T
The density changed.
16

Which property of physical changes explains why matter is conserved in a physical change?

T
The arrangements of particles do not change, and the bonds between atoms do not break.
M
Mass, not energy, changes in a physical change.
E
Energy and mass change in a physical change.
T
The bonds between atoms do not break; it is only the arrangement that changes.
17

How does Rutherford’s model of the atom compare with Thomson’s model?

T
They both describe atoms as small, indivisible spheres.
T
They both describe electrons as moving around the nucleus.
T
They both describe electrons as being surrounded by the positive matter.
T
They both describe atoms as being made up of positive and negative matter.
18

The atoms in a sample are close together but can slide past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.

g
gas to solid
g
gas to liquid
l
liquid to solid
s
solid to liquid
19

What was Johann Dobereiner’s contribution to the development of the periodic table?

H
He arranged the elements according to increasing atomic mass.
H
He arranged the elements according to increasing atomic number.
H
He identified triads of elements that had similar properties.
H
He organized elements into four groups based on their properties.
20

Which statement gives two characteristics of all liquids?

T
They spread out to fill space and have atoms that vibrate in place.
T
They have atoms that vibrate in place and have a definite shape.
T
They will change shape to fit a container and have definite volume.
T
They have definite volume and have atoms that move freely in all directions.

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