October 17th
– 21st
Quick notes: Acids
and Bases (add to Acids and Bases section of your ISN)
• Who’s
ever had heartburn or a bad stomach ache? Did you take a TUMS or Pepto-Bismol?
• These
are both antacids. They contain weak bases that sooth your heartburn by
reacting with and neutralizing the acid in your stomach.
• Acids
and Bases Neutralize one another because the the H+ of the acid and the OH- of
the base form H2O…WATER!
After quick notes review on acids and bases:
Video on Friction:
Posing question
Note=taking on
Forces (ADD TO FORCE AND MOTION SECTION OF ISN)
If objects
in motion tend to stay in motion, why don’t moving objects keep moving forever?
Things
don’t keep moving forever because there’s almost always an unbalanced force
acting upon them.
A book sliding across
a table slows down and stops because of the force of friction.
If you throw
a ball upwards it will eventually slow down and fall because of the force of gravity
Newton’s First Law of Motion:
MASS is the
measure of the amount of matter in an object.
It is
measured in Kilograms
The
law states: Unless acted upon by an unbalanced force, this golf ball would sit on
the tee forever.
What is this unbalanced force that acts on an
object in motion? FRICTION
•
There are four main types of friction:
•
Sliding friction: ice skating
•
Rolling friction: bowling
•
Fluid friction (air or liquid): air or water
resistance
•
Static friction: initial friction
when moving an object
AIR RESISTANCE:
•
A
type of frictional force that opposes the motion of objects that move through
the air.
•
Causes
objects to fall with different accelerations and different speeds.
•
Acts
in the direction opposite to the velocity of an object moving in air.
·
Size of the force depends on the size and
shape of the object
TERMINAL VELOCITY:
As an object falls, the downward force of gravity causes the
object to accelerate. As the speed of the object increases, the upward force of
air resistance also increases.
• When
the upward air resistance force equals the downward force of gravity, terminal
velocity is reached – the velocity becomes constant.
Depends on the size, shape, and mass of the object.
HOMEWORK
ASSIGNMENT:
Video on Acids:
• Before
the video, fill out the section for What do you know about acids?
• After
the video, discuss the after section
• Complete
the activity: Which are acids
Add to ISN (ACIDS
AND BASES SECTION)
• Indicators
such as litmus paper can identify whether a solution contains an acid or a
base.
• The
pH scale is used to describe how acidic or basic a solution is. (pH is also the
measure of hydrogen concentration)
• pH
= 7 is neutral
• pH
> 7 is basic
• pH
< 7 is acidic
Quick Lab Check:
• Is
vinegar an acid or base?
• When
you used the blue litmus paper; what color did it turn?
• Which
color on the ph scale is vinegar closely corresponding with?
• Conclusion:
Students were given a pH scale to label and color code to
place in ISN.
HOMEWORK:
EVERYTHING IS DUE
ON MONDAY (10/24TH) Have a good weekend J
Homework Assignments for the weekend J
*** Your project was due on Friday (10/21/16) If you have not turned
it in, Monday is the cut off date.
A.
Complete the Online Reading Assignment for
CK-12 “Types of Friction” (This assignment is past due as well if
you have not completed it. It was due on Friday (10/21/16) It has been extended
until Monday.
http://www.ck12.org/join/group/?accessCode=qpjuo (GROUP LINK)
qpjuo (GROUP CODE)
B.
Article on Friction (Complete the article summary
sheet) “FACT OR FRICTION”
C.
Friction Foldable (use the information from your CK-12
reading and additional notes to complete)
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