Transcript Missing two activities

Walking on
Water
Butterfly
Effect
Operation
Oobleck
Fly Far!
Habitat
Hunters
Missing two activities
Hovering Bubbles!
Post-Assessment 1:
https://cnu.edu:8443/survey/entry.
jsp?id=1171412917302
There is a link on the class web
page. The password is nsci310. It is
case sensitive.
WISE TELS Activity (online part):
If you can’t see the discussion or can
only see your own principle, then go on
to Activity 8 and complete it the best
you can.
You may not be able to do the posttest. If it doesn’t appear after you
complete Activity 8, don’t worry
about it.
If you had a partner, you will both
get the same grade.
The Rusty Nails: total mass of nails
before, moist dish, open dish, dry
completely, don’t let rust fall off,
total mass of dry rusted nails after.
A. The mass of the dry, rusted nails will
be more than the mass of the dry
nails before they rusted.
B. The mass of the dry, rusted nails will
be less than the mass of the dry nails
before they rusted.
C. The mass of the dry, rusted nails will
be the same as the mass of the dry
nails before they rusted.
Material from which the exam will
be drawn:
A.
B.
C.
D.
E.
F.
G.
Text content readings.
Handout content readings.
Diagnoser assignments.
Pre/Post-assessment.
Classroom activities.
Homework.
Power Points from class.
The exam will have:
A. Short discussion questions.
B. Multiple choice.
C. Question (s) on a live
demonstration.
D. Perhaps a performance part.
Classroom Activities:
A.
B.
C.
D.
E.
F.
Gravity On A Roll
Egg-tivity
Level the Lever
Puzzling Pyramids
By Golly By Gum By Time
Gravitational and Potential Energy –
marble and cup
G. Reactions
H. TELS: Heat and Temperature online at
WISE
Principles:
A.
B.
C.
D.
E.
F.
Newton’s Laws
Simple machines
Energy Conservation
Mass Conservation
Thermal equilibrium
Heat Flow
Formulas:
A. Net Force = Mass x Acceleration
B. Mechanical Advantage = Load / Effort
C. Gravitational Potential Energy is
proportional to Height
D. Kinetic Energy is proportional to the
square of the speed
E. Stored spring energy is proportional
to the square of the stretch
x
Motion
is described by
Position
Velocity
Acceleration
Location in space
Change in position
with time
Change in velocity
with time
has
Speed
and Direction
has
Change
of
speed
and Change
or of
direction
Simple
Types
of
Motion
freefall
Freely falling
objects all
accelerate at
the same rate
include
Position is fixed
Uniform Velocity
Constant Linear Acceleration
Velocity = 0
Speed = constant
Direction = constant
Acceleration = 0
Velocity = position
change divided by
time
Acceleration = constant
Motion along a line
Constant change in speed
Acceleration = velocity
change divided by time
Acceleration = 0
General
Motion
can be
shown by
Velocity = slope of
position vs. time
curve
in
general
Acceleration =
slope of velocity
vs. time curve
All
Motion
can be described using
Plots or graphs
Slope is rise over run
Acceleration = slope
of velocity vs. time
graph at point in time
Velocity = slope of
position vs. time
graph at point in time
rise
rise
run
run
steeper slope
shallower slope
rise
run
negative slope
Change in
motion
caused by
net force
is described by
Newton’s First Law
Newton’s Second Law
Newton’s Third Law
It takes a net force to
change the motion
Net Force = mass
times acceleration
Forces come in pairs
B on A
Body A
Body B
A on B
Simple
Machines
is described by
The force of the
effort can be smaller
than the load. You
can effectively
multiply the effort.
Mechanical
Advantage = load
divided by effort
The load can
move farther than
the effort. You can
multiply the
distance moved.
load
effort
Because energy must be
conserved, you can’t do both
with the same machine.
Power is energy
transferred, created
or consumed per
time. It isn’t the
same thing.
Energy
Work in the
simplest case is
force times distance.
It is energy. Work
can transfer energy
into or out of a
system.
is described by
Energy has many
forms. Examples are
Gravitational Potential
Energy and
Kinetic Energy.
In a closed system
the total energy of all
the forms stays
constant. We say
energy is conserved.
The Universe is the ultimate
closed system. Small systems can
be considered closed if you don’t
let energy in or out.
Energy can be
transformed from one
form into another. It
can’t be created or
destroyed
Matter
is described by
Matter has many
forms. Examples are
elements, molecules,
compounds and
mixtures.
Matter also has many
phases like solid,
liquid, gas, plasma,
amorphous, liquid
crystal, etc.
In a closed system the
total mass of all the
matter forms stays
constant. We say
mass is conserved.
The Universe is the ultimate
closed system. Small systems can
be considered closed if you don’t
let matter in or out.
Matter can be
transformed from one
form into another. It
can’t be created or
destroyed.
Changes of
phase are often
accompanied be
heat transfer.
Heat and
Temperature
are described by
Heat is a form of
energy. Heat flows
from a warm to a cool
body. Cooling is heat
leaving. Warming is
heat entering.
Temperature is the
concentration of heat
energy. If the heat
energy is more
concentrated, the
temperature is higher.
All bodies in the
same steady
environment always
come to the same
temperature given
enough time.
Analogy: total
amount of salt in
seawater. Heat is an
extensive property.
Analogy: saltiness of
seawater. Temperature
is an intensive property.
Bodies at the same
temperature can feel
hotter or cooler because
of the different rates at
which they transfer heat.
Questions?
A.
B.
C.
D.
Motion and force
Simple machines
Energy and mass
Heat and temperature
Demonstrations:
A.
B.
C.
D.
Circular motion
Energy transformations
Two identical balls?
The Heat Solution
B
A
C
D
E
concrete
abstract
The old incorrect
“impetus” theory
presumed that the
force applied to an
object sticks with
the object even after
the force is no
longer in contact
with the object.
A.
B.
C.
D.
E.
A.
B.
C.
D.
E.
A
B
C
D
E
A.
B.
C.
D.
E.