stud
bud
Sign up
Log in
Home
Library
Explore
SAT
More
PS Final pt. 1 Flashcards | StudBud
Explore
/
PS Final pt. 1
PS Final pt. 1
49 terms
·
StudBud Administration
·
443 plays
play to study for the exam
Flashcards
49 cards
F
Practice quiz
P
Host live
L
Questions
49
Answers
1
What is 78,900,000,000 expressed in scientific notation?
7.89 x 109
7.89 x 1010
7.89 x 1011
2
Every chemical compound is unique and different from the ____________________ it contains.
Elements
atoms
Compounds
3
A chemical reaction that transfers energy from the reactants to the surroundings is referred to as ____________________.
endothermic
fast
exothermic
4
To view objects that are very small, a scientist would use a ____________________ ____________________.
light microscope
electron microscope
bionculars
5
Semiconductors are elements that
have large atomic masses but small atomic numbers.
can conduct heat and electricity under certain conditions.
do not form compounds.
6
Which of the following is an example of a physical change?
rusting iron
burning wood into charcoal
dissolving salt in water
7
Energy may be converted from one form to another, but it cannot be ____________________.
added or subtracted
mixed or seperated
created or destroyed
8
Which statement about noble gases is correct?
They form compounds with very bright colors.
They are extremely rare in nature.
They exist as single atoms rather than as molecules.
9
A possible answer to a scientific problem is called a ____________________.
experiment
hypothesis
inference
10
Flammability is a chemical property that tells whether a substance reacts in the presence of ____________________.
Oxygen (O)
Sodium (NA)
Nitrogen (N)
11
The name dinitrogen tetroxide tells you that this compound contains
four nitrogen atoms and four oxygen atoms.
two nitrogen atoms and four oxygen atoms.
four nitrogen atoms and two oxygen atoms.
12
In an exothermic reaction, energy is transferred from
the surroundings to the reactants.
the reactants to the surroundings.
the container to the chemicals.
13
Atoms have equal numbers of ____________________ and ____________________.
Protons and neutrons
atoms and molecules
Protons and electrons
14
The law of conservation of mass states that mass cannot be
changed in form.
created or destroyed.
heated or cooled.
15
Often atoms join so that each atom will have
an outermost energy level that is full of electrons.
more electrons than either protons or neutrons.
an equal number of protons and electrons.
16
A substance that is made of atoms of more than one type bound together is called a ____________________.
Compounds
Molecules
Elements
17
The process of a liquid becoming a gas is called
condensation.
sublimation.
evaporation.
18
Aluminum, oxygen, and carbon are examples of ____________________.
Elements
Compounds
Molecules
19
How many oxygen atoms are in one molecule of table sugar (C
12
H
22
O
11
)?
12
22
11
20
The order of elements in the periodic table is based on
the number of protons in the nucleus.
the number of neutrons in the nucleus.
atomic mass.
21
Each molecule of iron oxide, Fe
2
O
3
, contains ____________________ atoms of iron.
3
5
2
22
Which state of matter will hold its shape without a container?
plasma
solid
gas
23
The most abundant gas in the atmosphere is ____________________.
Oxygen (O)
Sodium (NA)
Nitorgen (N)
24
At which time of day was the temperature approximately 5°C?
10:00 A.M.
11:00 A.M.
12:00 P.M.
25
The science of what matter is made of and how it changes is called
chemistry.
kinetics.
engineering.
26
The most common state of matter in the universe is called ____________________.
Plasma
Solid
Gas
Liquid
27
How is the density of an object calculated? _____________
D = M/V
D = M - V
D = M x V
28
A liquid changes rapidly into a gas at the liquid’s
freezing point.
melting point.
boiling point.
29
The proportion of oxygen in the atmosphere is closest to ____________________ percent.
50
20
5
30
Which of the following is an example of a decomposition reaction?
exchange of ions between two compounds
digestion
polymerization
31
According to Bohr’s model of the atom, electrons behave like
planets rotating on their axes.
planets orbiting the sun.
light energy in a vacuum.
32
Which statement about the atomic nucleus is correct?
The nucleus is made of protons and neutrons and has a negative charge.
The nucleus is made of electrons and has a positive charge.
The nucleus is made of protons and neutrons and has a positive charge.
33
Copper is a good conductor of electricity because its electrons
are shared between neighboring compounds.
can take on either positive or negative charges.
are free to move from atom to atom.
34
Each molecule of table sugar, C
12
H
22
O
11
, contains
6 atoms of carbon.
12 atoms of carbon.
1 atom of carbon.
35
You put 1 gram of salt into 1 liter of water and stir. The resulting liquid is an example of
a heterogeneous mixture.
a homogeneous mixture.
an immiscible mixture.
36
What determines the speed of the atoms and molecules of a particular substance?
Both (a) and (b)
temperature of the substance
size of the atoms and molecules
37
A(n) ____________________ reaction is one in which heat is transferred from the surroundings to the reactants.
warming
endothermic
exothermic
38
A change in the color of a solution is a sign that
a chemical change is taking place.
oxygen is present.
organic chemicals are present.
39
Knowing the chemical properties of a substance will tell you how the substance
reacts with other substances.
looks.
smells.
40
Grinding wheat into flour is an example of a ____________________ change.
color
Physical
Chemical
41
Digesting food is an example of
physical change.
change of state.
chemical change.
42
The heavier a particle, the _____ it moves.
faster
slower
less
43
A substance that undergoes a change in a chemical reaction is
an enzyme.
a chemical.
a reactant.
44
Ice floats in water because it is
more dense than water.
colder than water.
less dense than water.
45
The smallest unit of a substance that behaves like the substance is
an element.
an atom.
a molecule.
46
A ____________________ property describes how a substance acts when it reacts with other substances.
social
Chemical
Physical
47
A series of logical steps that is followed in order to solve a problem is called the
scientific method.
scientific theory.
experimental process.
48
Chemistry and physics are the two branches of ____________________ science.
Biological
Physical
Earth
49
Carbon and other nonmetals are found in which area of the periodic table?
on the right side
on the left-most side
in the middle column of the periodic table
