The main brances of natural science are

life, physical, and earth science

An atom's mass number equals the number of

protons plus the number of neutrons

Group 18 noble gases are inert because

their outermost energy level is full

Copper is a good conductor of electricity because its electrons

are free to move from atom to atom

Which statement about the alkali metals is correct?

They are located inthe leftmost column of the periodic table

When two H atoms bond, the positive nucleus of one atom attracts the

negative electron of the other atom

Molar mass is defined as

the mass in grams of 1 mole of a substance

Atoms have no electric charge because they

have an equal number of electrons and protons

Emperical formulas represent

a ratio of atoms in the compound

A scientific model is a

representation of a real event or object

A compound differs from a mixture because it

always contains the same elements in the same proportions

Often atoms join so that each atom will ahve

an outermost energy level that is full of electrons

Gases take up a lot of space because

their molecules have very little attraction for one another

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Mid-term Physical Science

75 termsStudBud Administration147 plays

Physical science quiz for chapters 1-5 in Holt science spectru. Chemistry focus.

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Questions 75

Answers

1
Which compounds have carbon-carbon double bonds?
alcohols
alkanes
ionic compounds
alkenes
2
Which of the following is an example of a physical change?
rusting iron
burning wood into charcoal
cooking an egg
dissolving salt in water
3
The science of what matter is made of and how it changes is called
chemistry
physics
kinetics
engineering
4
The main brances of natural science are
medicine and agriculture
physics and chemistry
biology, zoology, and ecology
life, physical, and earth science
5
An ionic bond is a bond that forms between
ions with oppisite charges
the electrons of two different atoms
one atom's nucleus and another atom's electrons
atoms with neutral charges
6
Carbon and other nonmetals are found in which area of the periodic table?
in the middle column of the periodic table
in the bottom rows
one the left-most side
on the right side
7
According to Bohr's model of the atom, electrons behave like
waves on a vibrating string
planets orbiting the sun
light energy in a vacuum
planets rotating on their axes.
8
The two main branches of science are
biological and earth science
natural and physical science
natural and social science
physics and chemistry
9
Scientists test a hypothesis by
formulating questions
designing models
drawing conclusions
doing experiments
10
A mole is an SI base unit that describes the
electric charge of a substance
volume of a substance
mass of substance
amount of a substance
11
The anion formed from an oxygen is called an
carbon dioxide
nitrous oxide
oxide ion
oxygen ion
12
The ability to change or to move matter is referred to as
evergy
evaportation
heating
kinetic theory
13
An atom's mass number equals the number of
protons plus the number of neutrons
protons plus the number of electrons
neutrons
protons
14
Oxygen's atomic number is 8. This means that an oxygen atom has
a total of eight electrons and neutrons
eight neutrons
eight protons
a total of eight neutrons and protons
15
Group 18 noble gases are inert because
their outermost energy level is full
they readily form positive ion
their outermost energy level is missing one electron
they can have either a positive or a negative charge
16
According to Bohr's theory, an electron's path around the nucleus defines its
speed
electric charge
atomic mass
energy level
17
Copper is a good conductor of electricity because its electrons
are shared between neighboring compounds
are free to move from atom to atom
are positively charged
can take on either positive or negative charges
18
A carbon atom can bond to four other atoms because it has
two inner energy levels
four valence electrons
no protons in its nucleus
four different cations
19
When ice melts to form water, energy
is absorbed
is released
is destroyed
is created
20
Which of the following elements is an alkali metal?
Manesium
Sodium
Calcium
Mercury
21
Ionization refers to the process of
changing from one period to another
turning lithium into fluorine
losing or gaining protons
losing or gaining electrons
22
Valence electrons determine an atom's
period
mass
chemical properties
electric charge
23
Which statement about the alkali metals is correct?
They are extremely non-reactive
They are located inthe leftmost column of the periodic table
They form negative ions with a 1- charge
They are usually gases
24
The first step in the scientific method is usually
making an observation
forming a hypothesis
collecting data
testing a hypothesis
25
When two H atoms bond, the positive nucleus of one atom attracts the
positive nucleus of the other atom
positive electron of the other atom
negative electron of the other atom
Negative nucleus of the other atom
26
Molar mass is defined as
the SI base unit that describes the amount of a substance
amount of a substance necessary to have a positive charge
the number of particles in 1 mole of a substance
the mass in grams of 1 mole of a substance
27
The force with which gravity pulls on a quantity of matter is referred to as
length
mass
volume
weight
28
Atoms have no electric charge because they
have an equal number of electrons and protons
have neutrons in their nuclei
have an equal number of neutrons and protons.
have an equal number of charged and noncharged particles
29
Atoms of elements that are in the same group have the same number of
neutrons
protons and neutrons
valence electrons
protons
30
Emperical formulas represent
only the cations in the compounds
a model of the compound
a ratio of atoms in the compound
a total of all ionic bonds
31
Which SI prefix means one million?
giga
milli
Kilo
mega
32
Matter is defined as anything that
has mass and takes up space
can be seen and touched
contains kinetic or potential energy
can be weighed
33
A substance that cannot be broken down into simpler substances is
a compound
an element
a mixture
an atom
34
Technology can be best defined as
science that uses computers
the use of lenses and microscopes
applied science
new inventions
35
The bonds that hold atoms together behave most like
glue
rubber cement
snap-together blocks
flexible springs
36
A scientific model is a
new theory that thkes the place of an incorrect one.
representation of a real event or object
mathematical statement of a theory
small building used to conduct experiments
37
The simplest organic compound is
methane
aspirin
salt
table sugar
38
Which of the following is an example of a chemical change?
converting matter into energy
grilling a burger
strumming a guitar
melting of copper
39
A precise measurement is one that
is close to the true value
contains at least three significant figures
is as exact as possible
contains the correct number of significant figures
40
The only state of matter that is not a fluid is
liquid
solid
Water
gas
41
Which state of matter has a definite volume, but not shape?
liquid
solid
plasma
gas
42
The resistance of a fluid to flow is referred to as
visosity
pressure
shape
energy
43
A compound differs from a mixture because it
is formed from two cations
always remains frozen even at high temperatures
can form only in the presence of heat energy.
always contains the same elements in the same proportions
44
In a metallic bond, the nucleus of one atom is attracted by a nearby atom's
negative ion
nucleus
electrons
energy structure
45
The process of a liquid becoming a solid is called
evaporation
freezing
melting
condensation
46
In which substance do molecules have the strongest attractions to one another?
water, a liquid
sulfuric acid, a liquid
Sugar, a solid
hydrogen, a gas
47
A liquid changes rapidly into a gas at the liquid's
condensation point
freezing point
boiling point
melting point
48
A protein is a polymer that is made of
simple sugars
DNA
amino acids
nitrogen and carbon dioxide
49
Evaporation refers to the change of state from a
liquid to a solid
gas to a liquid
solid to a liquid
liquid to a gas
50
Often atoms join so that each atom will ahve
an even number of electrons
more electrons than either protons or neutrons
an outermost energy level that is full of electrons
an equal number of protons and electrons
51
Gases take up a lot of space because
they have a small molar mass
They have weak chemical bonds
they contain very few atoms
their molecules have very little attraction for one another
52
Pascal's principle states that a fluid in equilibrium enclosed by a vessel exerts pressure
upwards
towards the vessel's opening
equally in all directions
downwards
53
The order of elements in the periodic table is based on
atomic mass
the number of neutrons in the nucleus
the number of protons in the nucleus
the electric charge of the nucleus
54
Buoyant force is the _ force exerted on an object immersed or floating on a liquid.
downward
upward
lateral
tensile
55
In which type of bond do atoms share electrons
polyatomic bonds
ionic bonds
covalent bonds
metallic bonds
56
Alkanes are hydro carbons that contain
single covalent bonds only
carbon and oxygen only
carbon, hydrogen, and oxygen
single or double convalent bonds
57
Dalton's atomic theory was accepted because
Dalton showed how molecules are formed.
Democritus said that it was correct
Dalton invented the electron microscope
there was evidence to support it
58
Scientfic theories can be changed or replaced when
scientists decide to work on different problems
new discoveries are made
New technology is invented
scientists make models of events or objects
59
Covalent bond are formed between
nonmetal atoms
ions
compounds
metal atoms
60
The kinetic theory states that the higher teh temperature, the faster the
lighter particles within a substance clump together
molecules of gas rush together
particles that make up a substance move
bonds between atoms break down
61
A mixture is different from a compound because each substance in a mixture
changes from a solid to a liquid
retains it own properties
forms an ion
charges its electric charge
62
A measurement that is accurate is one that
is as exact as possible
contains the correct number of significant figures
is close to the true value
contains at least three significant figures
63
Alcohols are organic compounds that contain
carbon and oxygen only
carbon, hydrogen, and oxygen
single or double convalent bonds
single covalent bonds only
64
Which statement is about noble gases is correct?
They exist as single atoms rather than as molecules
They form compounds with very bright colors
They are extremely rare in nature
They are non-reactive with both metals and nonmetals
65
The charge of an electron is
0
-2
-1
+1
66
The forces that hold different atoms or ions together are
electric currents
chemical bonds
physical bonds
nuclear forces
67
Which state of matter will hold its shape without a container?
liquid
gas
plasma
Solid
68
A series of logical steps that is followed in order to solve a problem is called the
experimental theory
model method
scientific theory
scientific method
69
Which of the following is not an example of a physical property?
boiling point
density
reactivity
Freezing point
70
The law of conservation of mass states that mass cannot be
heated or cooled
changed in form
created or destroyed
burned
71
Alkali metals are extremely reactive because they
have one valence electron that is easily removed
have two valence electrons that form compounds with calcium
have very mall atomic masses
are not solids at room temerature
72
The SI unit for measuring temperature is the
mole
kelvin
ampere
degree
73
The change of a substance from a solid directly to a gas is called
condensation
evaporation
sublimation
melting
74
Which statement about an element's average atomic mass is correct?
It is based on an isotope's charge.
It is determined by counting the number of isotopes
It is a weighted average, so common isotopes affect it more
It is equal to 1/12th the mass of the most common isotope
75
The process of a liquid becoming a gas is called
freezing
sublimation
condensation
evaporation

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