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Wednesday, November 30, 2011


Chapter 4 – States of Matter Presentations
Due Monday 12/19
You are learning about the states of matter.  It is your group’s job to master your content area.  You will read various books about your section in the textbook and research your content on the internet. 

Focus points: movement/motion of molecules, examples in our daily lives, how they affect us.

Each group will make:
1.  A visual presentation of their material: make a slideshow/PowerPoint and/or a display board; use physical examples such as a demonstration, a mini-lab, etc. (The physical examples can be done at home; just take pictures and add them to your presentation.)
2. A written summary of their subject matter; one page typed (~250 words, max. 300).  Each group member will attach their contribution to the final paper. I will collect each person's rough draft AND the final paper.  
Your paper should consist of the following: summary of your presentation, how this affects us in life, real world examples, molecular motion, how this is related to what we have already learned in class, i.e. energy
3. Three test questions about their material

Each person must contribute to their presentations; failure to do so will result in the group losing a letter grade.

Group 1 – Solids
Group 2 – Liquids
Group 3 – Gases
Group 4 – Solids ßàLiquids (melting/freezing)
Group 5 – Liquids ßà Gasses (evaporation/condensation)
Group 6 – What is Matter? States of Matter Graph
Group 7 – Density
Group 8 – Heat, Temperature, and Thermometers




Tuesday, November 29, 2011


Chapter 4 - States of Matter









molecules of solid            molecules of liquid                     molecules of gas


States of Matter

Matter is anything that has mass and takes up space.  Our food, drinks, homes, pens, and even our bodies are made up of matter.  There are three states or phases of matter that are important to us: solidsliquids, and gases.

Solid water = ice             Liquid water = fluid water   Gaseous water = water vapor



Solids


1.    Solids can turn into liquids.
2.   Solids have a definite shape.
3.   Solids have a definite volume.

Liquids

1.   Liquids have a definite volume.
2.   Liquids do not have a definite shape; they take the shape of their container.
3.   Liquids can turn into either a solid or liquids can turn into a gas.

Gases
1.   Gases can turn into liquids.
2.   Gases do not have a definite shape.
3.   Gases do not have a definite volume.
4.   Most gases are invisible.



 http://videos.howstuffworks.com/discovery/29388-assignment-discovery-states-of-matter-video.htm


Text Ch. 4 Review
- p. 129 Visualizing Main Ideas
- pp. 130-131 #1,2,4,6,10,11,13,14,15,21,22,25

Tuesday, November 15, 2011

LAB #8 – Simple Machines Help Us


LAB #8 – Simple Machines Help Us

A simple machine is a machine with few or no moving parts. Simple machines make work easier.  They can change the magnitude of force, the direction of the force, or the distance that the force travels.  Some examples of simple machines are: Screw, Wheel and Axle, Wedge, Pulley, Inclined Plane, and Lever. 

Problem      

 How do simple machines help us?


Hypothesis





Materials
 Various simple and compound machines

Procedure

You will be making observations on various objects that your teacher passes out and on objects located in the classroom.  You must fill out the Results section with information about the objects.  If they are simple machines, then you are to infer what kind of simple machines they are; if they are compound machines, then you are to infer what kind of simple machines they are made out of.

Results:
Name of the object
Purpose of the object
What kind of simple machine is it?
Draw a picture of the object
1. Plastic drink top



2. chemistry tongs



3. cooking thermometer



4. scissors



5. light bulb and clamp



6. plastic car



7. spray bottle



8. staples



9. clip on clipboard



10. plastic spoon



11. plastic fork



12. plastic knife



13. nails (on wall)



14. screw (in wall)



15. ramp



16. stapler



17. triple beam balance



18. crazy coaster track



19. blinds



20. wheel on push cart



21. file cabinet drawer



22.



23.



24.



25.




Analysis:

1.       How do simple machines make our lives easier?



               
2.       Pick five objects from the lab and explain how it would be like without them.  How would you accomplish the tasks they help us with without them?



                
3.       Find five simple machines at home and add them to your Results.


Conclusion:













(Write a summary of your experiment.  Was your hypothesis right?  What did you learn?  What could you do next time?  Was it fun?  How is this related to what we are learning in class?)

Thursday, November 10, 2011

Lab #6 – Calculating Work pt. 1


Lab #6 – Calculating Work pt. 1

Work = Force x distance
Work = (Force)(distance)
W = Fd

Problem
How is the force needed to lift an object and the distance that object travels related to the amount of work done on the object?

Hypothesis





Materials
Ruler
Chair
Ramp
Object
Object with added mass
Spring scale
Triple Beam Balance

Procedure A
1.         Measure the distance in cm from the floor to the chair’s seat.  Record your data in the Distance column of your Results.
2.         Attach the wood block to the spring scale and pull it the distance from the floor to the chair’s seat.  Record the force that the wood block pulled on the spring scale into your Force column.
3.         Repeat this experiment with the Weight (300 g) and record your data.
4.         Use the work formula to calculate the amount of Joules for the object and the object with added mass and place into the appropriate column.

Results A

Work done without ramp
Object
Force
(Newtons)
Distance (cm)
Work (Joules)
Object
________ N
   _____cm
   
_______J
Object with added mass





Independent Variable = ___________________
Dependent Variable = ___________________
Constants = _____________________________________


Procedure B
  1. Use your ramp to make an inclined plane from the floor to the chair’s seat and measure the length of the ramp; record this into the Distance column of your Results.
  2. Attach the wood block to the spring scale, and pull it from the floor to the chair ’s seat up the ramp.  Record the force that the wood block pulled on the spring scale into your Force column.
  3. Repeat this experiment with the Weight (300 g) and record your data.
  4. Use the work formula to calculate the amount of Joules for the wood block and the weight (300 g) and place into the appropriate column.

Results B

Work done with ramp
Object
Force (Newtons)
Distance (cm)
Work (Joules)
Object



Object with added mass





Independent Variable = ___________________
Dependent Variable = ___________________
Constants = _____________________________________


ANALYSIS

1.          How did the weight (force) affect the amount of work done on the object?



2.          How did the distance affect the amount of work done on the object?




3.          Compare/Contrast the work done between using the ramp and not using the ramp.



4.          In which trial was the most work done?  In which trial was the least work done?  Explain.


5.          Compare the Force (Newtons) from your “object” in Procedure A with your “object” in Procedure B.  Which was easier? i.e. less force used to pull up

6.          Compare the Force (Newtons) from your “object with added mass” in Procedure A with your “object with added mass” in Procedure B.  Which was easier? 

7.          In these comparisons, what are your independent and dependent variables, and your constants?

Conclusion

(Write a summary of your experiment.  Was your hypothesis right?  What did you learn?  What could you do next time?  Was it fun?  How is this related to what we are learning in class?)












Wednesday, October 26, 2011

Brainpop Energy Videos

1. Go to: http://www.brainpop.com/
2. Username: ps220  Password: brainpop
3. search "energy"
4. watch: Forms of Energy, Kinetic Energy, Potential Energy, Wind Energy, Solar Energy, Energy Sources, and Fossil Fuels.
5. Take the Quiz at the end of each video; if you do well, you are sure to do well on next week's Energy Exam. :)

Tuesday, October 25, 2011

*** Science Notebook Check #2***

*Homework Ch.2*


Homework is to be done in your Science Notebook unless you are notified about a change.  You must date and label each assignment.  Mr. C may check your HW the next day, or I may check it during a notebook check, but it WILL be graded.  Incompletion of HW assignments may lead to a HW Party after school on Friday!



1. C2S1; vocabulary, RC, BQ, SC #1-5


2. C2S2; vocabulary, RC, BQ, SC#1,3,5
 3. C2S3; vocabulary, RC, BQ, SC #1,2,4