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Hi Students and Parents!
The end of the First quater is almost here!We will be starting Chapter 5 (Energy this week!
Test 3 on Chap 4 ;Work and Machines, and chap 5 energy will be on Monday 10/21
A study guide will be posted here and issued in class on Thursday so that students prepare during the long week end.
HI Parents and Students,
Our next major test will take place on Wed 10/2. (Forces Motion and Energy)
There is no school for students so they can use Friday, all weekend, Mon And Tuesday to Prepare.
Good Luck!
Nelson F
Below is a Study guide for your learning Pleasure!
CHAPTER 1, SECTION 1 STUDY GUIDE
MAKE SURE TO USE AS MANY MATERIALS AS POSSIBLE TO REVIEW FOR THE TEST (TEXTBOOK, Intereactive Notebook,YOUR WORKSHEETS,…).
- What is motion?
- What is a reference point? What objects make good reference points? Give 2 examples of objects that are good reference points.
- When is an object in motion?
- What are the equations for Speed, Time, and Distance?
- What are the 4 steps to solve a Speed/Time/Distance problem?
- What is the equation for Average Speed? Give an example of Average Speed.
- What is Instantaneous Speed?
- How are Speed and Velocity different? Give an example of Velocity.
- How can you find the slope in a Distance vs. Time Graph?
- What information does the slope give you about the object that is being plotted?
- What happens to the Speed of an object as the slope in a graph increases? Draw an example in which the slope in a graph increases.
- What happens to the Speed of an object when there is no slope in a graph (that is, rise = 0, and the line is horizontal)? Draw an example in which there is a certain slope, then no slope, then again a certain slope.
Chapter 2 : FORCES
Sections 1: The Nature of Forces
Section 2: Friction and Gravity
Section 3 :Newton’s 1st and 2nd laws
Section 4: Newton’s 3 law
Force: A push or pull, some are contact forces (pushing a cart) and others are non-contact forces (electric force, magnetic force, gravity)
Newton
Abbreviation is N, the unit used to measure force, named after Isaac Newton.
Net Force
The combination of all the forces acting on an object, the TOTAL force on an object.
Balanced Forces (Explain what they are and what effect they have on an object’s motion.)
Unbalanced Forces (Explain what they are and what effect they have on an object’s motion)
- Inertia
- Friction (Explain what it is and types, why it happens, and how to increase or reduce friction)
- One thing that affects friction is force between objects and as it increases, friction increases.
- Another factor that influences friction is surface area, and as it increases, friction increases.
- The third factor that influences friction is surface substance, and as it increases (or gets rougher), friction increases.
Four types of friction and examples:
Static: When an object is resisting motion, and not yet moving.
- Ex. Pushing a heavy piece of furniture.
Sliding: When 2 solids slide past each other.
- Ex. Sliding down a slide at the playground, erasing pencil marks.
Rolling: When one of the objects is round
- Ex. Wheels of any type, rollers in a factory, ball bearings
Fluid: (Make sure you know that both liquids and gases are fluids.)
When one of the substances is a fluid.
- Ex. Swimming, air resistance when biking
The two factors that affect gravity and how they affect gravity:
- One thing that affects gravity is distance and as it increases, gravity decreases.
- The other factor that influences gravity is mass , and as it increases, gravity increases.
Newton’s 3 Laws of Motion (Define and be able to apply all three laws to real life events.)
1st law: An object in motion will stay in motion and an object at rest will stay at rest until acted upon by an unbalanced force. It takes an unbalanced force to overcome inertia and make an object accelerate (speed up, slow down, change direction)
2nd law: The acceleration of an object depends on the force applied to the object and the mass of the object.
- If the mass of an object increased, but the force on it stayed constant then the acceleration of the object would decrease.
- Ex: If a car and truck were racing but both have the same engine, the car will have more acceleration and win.
- If the force on an object increased, but the mass of the object stayed the same then the acceleration would increase.
- Ex. If I push my sister on the swings soft vs. hard, the stronger push will accelerate her more.
- If the mass doubled and the force was cut in half, then the acceleration would be reduced to ¼
- Example: If I push a cart filled with 2x the groceries, but have a child (smaller, weaker) push it with ½ my force and the cart will accelerate only ¼ as much.
3rd law: For every action there is an equal and opposite reaction. ***Action/Reaction forces do NOT act on the same object. They are not balanced forces, because they act on separate objects.***
- If an action force was wind pushing/pulling on a windmill
- The reaction force would be the windmill pushing/pulling on the wind (air molecules)
- The result of the action force would be: The windmill starts to turn
- The result of the reaction force would be: The air molecules slow down when they hit the windmill.
Hi All,
Hope you all had a blast with the speed challenge. Looking forward to another great week , we will be moving to section 3; ACCELERATION
DON"T forget to turn in the research paper and material list for the science fair Project if you had an extention
Keep working on your science Fair project
Keep up with the good work!
NF
Sincerely,
NF
Hello Parents and students,
I am writing to make some clarification on textbooks.
Textbooks will not be distributed as there is an on line textbook. Students who have difficulty accessing the on line book should request to signed out textbooks for use at home. There is no need for those books to make a daily visit to school. There is a classroom set for daily use.
Please let me know how the online access does not work for you so I can sign out a hard copy.
textBook online codes
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Chemical Building Blocks
Earth's Changing Surface |
From Bacteria to Plants
Nature of Science and Technology
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Human Biology and Health |
Motion, Forces and Energy http://www.phschool.com |
Quick and easy to set up
