8th Grade Science

1
8th Grade Science
Do Now
Monday, March 18, 2013
Make the weekly Do Now on page ___. Draw a
photo of yourself over spring break. Your photo
must have 3 colors, a caption, and a description
underneath it.
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8th Grade Science
Todays Schedule
Monday, March 18, 2013

1. Do Now
2. BBs vs. Marbles
3. Write a Law
4. Video

Pre-AP Grade-Level
Homework 8.6B STEMScopes Homework 8.6B
Quiz on Friday! Quiz on Friday!
Essential Question
Vocabulary
How do we calculate and communicate the change in
position, direction and speed for moving
objects? How do unbalanced forces affect the
motion of an object? How de we transform energy
to make it useful?
Acceleration Velocity
3
8th Grade Science
Today we will
Monday, March 18, 2013
8.6 (B) differentiate between speed, velocity,
and acceleration Objective Students will be
able to explain how mass and acceleration are
related.
4
8th Grade Science
BBs vs. Marbles
Monday, March 18, 2013

• Move the containers with BBs and marbles from
  side to side and record 5 observations in your
  notebook on page __.
• Then, copy and answer the following questions
• What were the similarities in the motion of the
  BBs and the marbles?
• What were the differences in motion between the
  BBs and the marbles?
• Make a hypothesis about why there were
  differences in their motion.

5
8th Grade Science
Write a Law
Monday, March 18, 2013

If you were going to write a rule about how
objects moved based on their mass, what would you
write? As a table, write a law based upon your
observations with the BBs and marbles.
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8th Grade Science
Video
Monday, March 18, 2013

Three Laws of Motion
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8th Grade Science
After Video
Monday, March 18, 2013

After watching the video, revise your law.
8
8th Grade Science
After Video
Monday, March 18, 2013

Newtons 2nd Law of Motion Acceleration is
produced when a force acts on a mass. The greater
the mass (of the object being accelerated) the
greater the amount of force needed (to accelerate
the object).
9
8th Grade Science
Do Now
Tuesday, March 19, 2013
Jack throws a tennis ball as hard as he can
across a field. Then, he throws a bowling ball
across a field as fast as he can. Describe the
difference between the force, acceleration, and
mass of the objects.
10
8th Grade Science
Todays Schedule
Tuesday, March 19, 2013

1. Do Now
2. Video
3. Acceleration

Pre-AP Grade-Level
Homework 8.6B STEMScopes Homework 8.6B
Quiz on Friday! Quiz on Friday!
Essential Question
Vocabulary
How do we calculate and communicate the change in
position, direction and speed for moving
objects? How do unbalanced forces affect the
motion of an object? How de we transform energy
to make it useful?
Acceleration Velocity
11
8th Grade Science
Today we will
Tuesday, March 19, 2013
8.6 (B) differentiate between speed, velocity,
and acceleration Objective Students will be
able to define acceleration and describe how a
greater force causes greater acceleration, and
less mass causes greater acceleration.
12
8th Grade Science
Video
Tuesday, March 19, 2013
Roller coaster video As you watch, record 3
examples of acceleration and 3 examples of
deceleration.

13
8th Grade Science
Acceleration
Tuesday, March 19, 2013

• If an object speeds up, slows down, or changes
  direction, the objects is accelerating.
  Acceleration occurs because a force acts upon an
  object, causing the object to change its speed or
  direction. Recall that a force is a push or pull.
  Acceleration can also be described as a change in
  velocity. Any object increasing or decreasing its
  speed or changing directions is accelerating.
• On page ___,
• List at least 3 vocabulary words
• Copy the most important sentence from the reading
• Write the definition of Acceleration in your
  own words

14
8th Grade Science
Acceleration
Tuesday, March 19, 2013
Complete RM 9 and RM 11.
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8th Grade Science
Do Now
Wednesday Thursday, March 20 21, 2013

• On page 76
• Draw a graph with an x- and y-axis.
• Labeled the y-axis speed
• Label the x-axis labeled time.
• Draw a line that would show an object staying at
  a constant speed.

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8th Grade Science
Todays Schedule
Wednesday Thursday, March 20 21, 2013

1. Do Now
2. Finish RM 9 and 11
3. Gum Lab
4. Gallery Walk
5. White Board Review

Pre-AP Grade-Level
Homework 8.6B STEMScopes DUE FRIDAY Homework 8.6B DUE FRIDAY
Quiz on Friday! Quiz on Friday!
Essential Question
Vocabulary
How do we calculate and communicate the change in
position, direction and speed for moving
objects? How do unbalanced forces affect the
motion of an object? How de we transform energy
to make it useful?
Acceleration Velocity
17
8th Grade Science
Today we will
Wednesday Thursday, March 20 21, 2013
8.6 (B) differentiate between speed, velocity,
and acceleration Objective Students will graph
acceleration on a speed vs. time graph.
18
8th Grade Science
Finish RM 9 and 11
Wednesday Thursday, March 20 21, 2013

• Periods 1 Grade
• Period 2, 4, 5 and 6 Finish and Grade
• RM 9
• Under Motion write if the example is speed,
  velocity, or acceleration
• Under Justification explain how you know that
  it is speed, velocity or acceleration.

19
8th Grade Science
Gum Lab
Wednesday Thursday, March 20 21, 2013
Part I. a) 5 Trials- 30 seconds each b) Analysis
Questions Part II. a) 1 Trial- 2 minutes b)
Record Chomps TOTAL number of chomps every 20
seconds. c) Analysis questions

20
8th Grade Science
Gum Lab
Wednesday Thursday, March 20 21, 2013

• Part III.
• -1Trial- 1 minute
• Record number of chomps every 10 seconds
• Each person in group does something different
• Constant Speed
• Accelerate
• Decelerate
• Chomp-Stop-Chomp

21
8th Grade Science
Gum Lab
Wednesday Thursday, March 20 21, 2013

• Group Graph from Part III
• Make a distance vs. time graph
• Each person is a different color
• Graph the number of chomps over time

22
8th Grade Science
Gum Lab
Wednesday Thursday, March 20 21, 2013

• Group Graph from Part III
• On the back of your paper
• Make a speed vs. time graph
• Each person is a different color
• Graph the number of chomps over time

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8th Grade Science
Graph Gallery Walk
Wednesday Thursday, March 20 21, 2013


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8th Grade Science
Scenario Practice
Wednesday Thursday, March 20 21, 2013

• For each problem
• Create a distance vs time graph
• Create a speed vs time graph
• Write a description of the motion
• A space shuttle launches heading to the moon.

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8th Grade Science
Scenario Practice
Wednesday Thursday, March 20 21, 2013

• For each problem
• Create a distance vs time graph
• Create a speed vs time graph
• Write a description of the motion
• A person hikes 20 miles in one day toward a
  mountain summit.

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8th Grade Science
Scenario Practice
Wednesday Thursday, March 20 21, 2013

• For each problem
• Create a distance vs time graph
• Create a speed vs time graph
• Write a description of the motion
• A car completes a 300 mile trip in 6 hours.

27
8th Grade Science
Scenario Practice
Wednesday Thursday, March 20 21, 2013

• For each problem
• Create a distance vs time graph
• Create a speed vs time graph
• Write a description of the motion
• An elevator descends from the 8th floor to the
  1st floor, slowing as it goes down.

28
8th Grade Science
White Board Review
Wednesday Thursday, March 20 21, 2013
Review Questions

29
8th Grade Science
Do Now
Friday, March 22, 2013
Write a 5 sentence paragraph comparing speed,
velocity, and acceleration.
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8th Grade Science
Todays Schedule
Friday, March 22, 2013

1. Do Now
2. Quiz 8.6B
3. Isaac Newton

Pre-AP Grade-Level
Homework 8.6B due today Homework 8.6B due today
Quiz Today! Quiz Today!
Essential Question
Vocabulary
How do we calculate and communicate the change in
position, direction and speed for moving
objects? How do unbalanced forces affect the
motion of an object? How de we transform energy
to make it useful?
Acceleration Velocity
31
8th Grade Science
Today we will
Friday, March 22, 2013
8.6 (B) differentiate between speed, velocity,
and acceleration Objective Students will show
mastery of TEKS 8.6B.
32
8th Grade Science
Quiz 8.6 B
Friday, March 22, 2013
Read and re-read the passage. Underline the
question Bubble important words Identify the key
idea, write it in margin. Eliminate the wrong
answers Select the correct answer ?
predator/prey interactions
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8th Grade Science
Isaac Newton
Friday, March 22, 2013
Read Isaac Newton Special Assignment