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Chemical
Reactions
Matter
The Periodic
Table
Hodge
Podge
5 Letter
Words
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1. The rate of change
of velocity is known
as
_______________
____________.
Acceleration is the rate of
change of velocity
2. Forces on an object that are
equal in size and opposite in
direction are called ________
forces.
Balanced forces
are equal in size
and opposite in
direction
3. Newton’s Second Law states
that the greater the
_______________ of an object
the greater the amount of force
needed to accelerate the object.
The greater the
mass, the greater
the force needed
to move the object
4. The attractive force between
two objects that depends on the
masses of the objects and the
distance between them is
______________ .
Gravity is the attractive force
between two objects
5. ________________ is the
gravitational force exerted on an
object’s mass.
Weight is the
gravitational force
exerted on an
object’s mass
6. Mechanical energy is the total
amount of __________ in a
system.
Kinetic energy +
potential energy =
Mechanical
Energy
7. The ability to cause change is
____________ .
Energy is the
power to cause
change
8. The energy a moving object
has because of its motion is
_________________
Kinetic energy is
energy in motion
9. In order for work to be done a
force must ________________ .
Force is needed to
make something
move
10. ________________ is the
rate at which work is done.
Power is the rate
at which
something is done
11. When a machine is used to do
work, the force that is applied to the
machine is the ________ .
Input force = the work the person
does
12. This type of machine does work
with only one movement of the
machine
.
SIMPLE
MACHINES
HAVE ONLY
ONE
MOVEMENT
13._______________ is the transfer
of thermal energy in a fluid by the
movement of warmer and cooler
fluid from place to place.
Convection is the transfer of
THERMAL energy in a fluid
14. A material in which heat
flows slowly is
a(n)_______________.
Heat flows slowly in
an insulator
15.What kind of machine is this
Screw
16. Calculate the net force
shown in the vector diagram
below.
10 N
+
5N
=
5N
17. If all the atoms in a substance
have the same identity, that
substance is a(n) _______
Elements have the same identity
18. A _________________ is a
substance in which the atoms of
two or more elements are
combined in a fixed proportion.
When two or more
elements combined it
is called a compound
19. The scattering of
light by colloidal
particles is call the
_________________
Tyndall effect is the scattering of
light by colloidal particles
20. A ____________________ is a
heterogeneous mixture containing a
liquid in which visible particles
settle.
Suspension is a
heterogeneous mixture
in which particles settle
21. Any characteristic of a material
that you can observe without
changing the identity of the
substances that make up the material
is a _________________
Physical properties
can be observed and
do not change the
identity of the
substance
22. The law of conservation of mass
states
The mass of all substances that are
present before a chemical change
=
the mass of all substances after the
change
23. ____________ is the average
kinetic energy of the particles of a
substance
Temperature is the
average kinetic
energy of the
particle in a
substance
24. _____________ is the ability of
a fluid to exert an upward force on
an object immersed in it.
Buoyancy exerts an
UPWARD force on
an immersed object
25. The resistance to flow by a
fluid is ___________________
Viscosity is the resistance to flow
by a fliud
26. A(n) __________ is the
smallest piece of matter that still
retains the property of the
element.
An Atom is the smallest piece of
matter
27. The small positively charge
center of the atom is the
_______________
The nucleus is positively
charged
28. The atomic number of an
element is equal to the number of
______________
# of protons = atomic number
29. Atoms of the same element
that have different numbers of
neutrons are called_________
Isotopes have a different
number of neutrons for the
same element
30. The horizontal rows of
elements on the periodic table are
called ___________
Periods are horizontal
rows on the periodic
table
31. The numbers of electrons in
the first three energy levels
around an atom are:
2,8,18
32. Metals are
Metals are shiny,
ductile, malleable and
good conductors of heat
and electricity
33. ___________ are different
forms of the same element having
different molecular make-ups
Allotropes are different
forms of the same
element
34. A(n)____________is the
attraction that forms between
atoms when they share electrons.
The neutral particle that is
formed as a result of electron
sharing is called a molecule.
Covalent bonds occur when
atoms SHARE electrons
35. Balance the following equation:
__S8 + __O2
__ SO3
1 S88 + 12O2
8SO3
36. A _____________ has a
slightly positive end and a
slightly negative end although the
overall molecule is neutral.
Example: water.
Polar Molecules have a
positive end and a
negative end but are
overall neutral atoms
38. Properties of Acids
Acids taste sour, are corrosive,
and have a pH below 7
39. Max is running in a race in
Texas. He has a mass of 40g. The
race is 10 km long. He is moving
at a speed of 2m/s. What is
Max’s kinetic energy?
KE= mv2
2
½(40)10 = 80J
40. In solution, bases react with indicators to produce changes
in color. The indicator litmus turns blue in bases. A student is
testing the pH of several liquids. His results are shown in the
data table below.
Substance
A
B
C
Indicator color
Blue
Blue
A
According to the data in the data table and the information in
the reading, which of the following substances had a basic
pH?
A base will change the color of
the pH paper blue
both A&B are blue
41. Which elements are in period
3?
42. What is the atomic number of
lead?
42. What is the atomic number of
lead?