Note to parents: We on the School Governance Council are trying to get parents involved in using the  Engrade system.  Say hello using Engrade and Identify yourself as a parent,  just so I know how many parents are checking. There will be a free training session downtown on January 17 from 7-8 and 8-9; check the flyer in your student's progress reports.  As a parent, what could we do to get you to log in on Engrade under your own account, not your student's account?

6th Graders -
Study for your test on Friday. Look over notes in your science notebook and look over your study guide. If there's something you don't understand about what is on the study guide, ask your study buddy or Engrade me tonight. If you did not do your homework last night, solve the following problems. Be sure to show your math work and units in your answer, or get a zero for your work:

Density Problems: What is the formula for density? Write it just under the title!!!
D = (If you can't remember it, get it out of your notes!)

1. A Hershey's King Size chocolate bar with almonds is 14.5 cm long, 5.2 cm wide, and 1 cm high, with a mass of 73 g. What is the chocolate bar's:
a) volume (hint: v = L x W x H); and
b) density (hint: D = __/ v).

2. My white board eraser is 12.2 cm long, 4.7 cm wide, and 2.7 cm high, with a mass of 12.6 g. What is the eraser 's:
a) volume; and
b) density

3. A wood block has dimensions of 3 cm, 2 cm and 1.5 cm, with a mass of 6.39 g. What is the wood block's:
a) volume; and
b) density.

4. A steel bar has the following quantitative data: L = 8 cm, W = 3 cm, H = 2 cm, mass = 374.88 g. What is the steel bar's:
a) volume; and
b) density.

5. A gold piece is 5 cm x 5 cm x 2 cm, with a mass of 965 g. What is the gold piece's:
a) volume; and
b) density.

8th graders -
Period 5 - no homework assigned. If you haven't already done so, take this chance to make a word wall card (minimum size 4" x 6", must be colorful and readable from a distance).

6th Graders -

Study for your test on Friday.  Look over notes in your science notebook and look over your study guide. If there's something you don't understand about what is on the study guide, bring it up in class tomorrow. Also for homework, solve the following problems. Be sure to show your math work and units in your answer, or get a zero for your work:
Density Problems: What is the formula for density? Write it just under the title!!!
D =                             (If you can't remember it, get it out of your notes!) 

1.  A Hershey's King Size chocolate bar with almonds is 14.5 cm long, 5.2 cm wide, and 1 cm high, with a mass of 73 g. What is the chocolate bar's:
     a) volume (hint: v = L x W x H); and
     b) density (hint: D = __/ v).

2.  My white board eraser is 12.2 cm long, 4.7 cm wide, and 2.7 cm high, with a mass of 12.6 g. What is the eraser 's:
         a) volume; and
         b) density

3. A wood block has dimensions of 3 cm, 2 cm and 1.5 cm, with a mass of 6.39 g.    What is the wood block's:     
       a)  volume; and
       b) density.

4.  A steel bar has the following quantitative data: L = 8 cm, W = 3 cm, H = 2 cm,    mass = 374.88 g.   What is the steel bar's:
      a) volume; and
      b) density.

5.  A gold piece is 5 cm x 5 cm x 2 cm, with a mass of 965 g.  What is the gold piece's:

     a) volume; and
     b) density.


8th graders -

Period 5 - no homework assigned. If you haven't already done so, take this chance to make a word wall card (minimum size 4" x 6", must be colorful and readable from a distance).

6th Graders -
Study for your test on Thursday, and answer Analysis Questions assigned to your class from Activity 9, p. A-40 (period 2, Qs 1-3.//////period 3, Q 1).  Look over notes in your science notebook and look over your study guide. If there's something you don't understand about what is on the study guide, bring it up in class tomorrow.

8th graders -
Questions 1-5 (Checking Concepts and Thinking Critically) handed out after class today. Extra credit if you do that math work at the bottom.

Homework for tonight:
8th Grade -  Unit 2 Machines: Student Information - read and answer questions on the reverse side.
6th Grade -
period 2 - answer the problems on the "Reading Volume and Density" worksheet; and practice using  a triple beam balance for yourself using the simulation found at http://www.ohaus.com/input/tutorials/tbb/TBBread.html.
Period 3 - answer the problems on the "Density" worksheet (back of reading volume sheet done in class); and practice using  a triple beam balance for yourself using the simulation found at http://www.ohaus.com/input/tutorials/tbb/TBBread.html.
Density problems:
Homework for tonight included reading graduated cylinders (which I can't' duplicate here and the following density problems): Density = mass divided by volume. Units of measurement include grams for mass, cubic centimeters or cm3 for volume, and combination for density g/cm3.


1.The mass of a block is 275 grams and the volume of the block is 25 cm3. What is the block's density?

2. The volume of a rock is 5cm3 and the mass of the rock is 35 grams. What is the rock's density?



To find Volume of a regularly shaped object :

Length x width x height = L x W x H (no problem here; use this for problem 3)

3. A cardboard box has a length of 3 cm, a width of 2 cm, and a height of 2 cm. The mass of the cardboard box is 48 grams. What is the density of the cardboard box?

6th Grade- Check your study guides for next week's test and use them to see what information you know compared to what you need to know. Also, write conclusions for your lab reports, due tomorrow.

8th Grade - No homework.

Also, Piscid Meteor shower in the SW sky and the Geminid meteor shower peaks tonight, Dec. 13. The weather looks very clear !

6th Graders - answer Analysis Questions for activity 5, p. A-35 on a separate piece of paper. Take home vocab quiz - don't miss it!!! 

8th Graders -test tomorrow - study notes for forces and motion unit, study the review sheet.  Just got out of Professional Development meeting, have an appointement in 7 minutes.  No time to add more info.  Check back tonight about 7.
Update in progress......
Questions that you should be able to answer based on lessons in book, activities and notes:
1. When you have zero net force, are forces balanced or unbalanced?

2. When a cart with a pumpkin on it crashes into a desk, what happens to the pumpkin if it is not tied down?  The pumpkin goes _________________ (hint: verb; ends with "-ing"; its what birds do).  Which direction did the pumpkin go?  Why? Now, ask: why do we put seat belts in cars?  What do seat belts prevent?  What would happen to front seat passengers in front end collisions if the passenger wasn't wearing a seat belt?  Why?  Explain using vocab (inertia, unbalanced forces, speed).

3. What is friction? 

4. How does friction help you walk?

5. If you had to slide a heavy piece of furniture across the street, would you rather slide it on asphalt or on ice? Why?  Assume there is no traffic.

6. What is center of mass?  If you had to choose between two cars that were identical, would you rather have one with a low center of mass, or a high center of mass?  Explain: why is one stable and more safe than the other?

8th Graders: Review study guide and notes from the unit on Forces and Motion.  Test Thursday. IF you're doing make up work (C.C.), use the SEPUP link to the right. User name: rms21, pw: mgoldsmith


6th Graders: homework tonight:
part 1) Fill out page 2 of your Lab Report form and
part 2) be ready for an easy vocab quiz.

8th Graders:  Finish answering questions on Activity 87, Fatal Accidents, pg. E-64 on a spearate piece of  paper.  Find the questions on the SEPUP link to the right.  User name: rms21, pw: mgoldsmith
6th Graders: homework tonight:

part 1) Fill out page 1 of your Lab Report form (including Problem, Hypothesis, Materials and Procedures).  Remember, your Problem must be written as a question! 

part 2)  study for an easy vocab quiz (first of several on these words) tomorrow on the following words:

• Substance - any element, compound or other material. Pure substances are either elements or compounds.
• Element - substance that cannot be chemically broken down into simpler substances.   Contains only one type of atom. Ex: Oxygen (O), hydrogen (H), carbon (C).
• Compound - made up of 2 or more elements chemically combined which has different properties than its elements. Ex: water (H2O); carbon dioxide (CO2).
• Mixture - made up of 2 or more elements physically combined, in any ratio, can be physically separated by using the ingredients' properties.  "Physically combined"  means put in the same place at same time), and can be physically separated.   Ex: soda
• Corrosive - a substance that reacts with a solid material. Ex: sulfuric and other acids corrode metals like iron.
• Flammable - a substance that catches on fire when exposed to spark, flame or heat.
• Toxic - Poisonous if inhaled, ingested or absorbed through skin. "Ingested" means swallowed. "Absorbed" means soaked up.
• Properties - are characteristics of each substance, and we can use the properties of each substance to distinguish (tell the difference), between substances. Properties may be physical or chemical.
• Physical properties are characteristics that do not change whether the amount is very large or very small, such as color, hardness, state, density, flexibility, and conductivity.
• Chemical properties are the specific result of a test with another chemical. Ex: flammability, pH (is a substance acid, neutral or base?), reactivity with acid, unique color change in a chemical reaction, or production of a salt when an acid reacts with a metal.
• heterogeneous - a mixture in which you can see the different substances that make up the mixture.
• homogeneous - a mixture where you can not see that it is made up of different substances; all parts of the mixture look the same.
• Measurement - Every measurement has two parts: number (quantity) and unit (standard amount).
• Customary system units of length: inch, foot, yard, mile; 12 inches = 1 foot; 3 feet = 1 yard; 5,280 ft = 1 mile.
• Metric Units of length: m = Meter, basic metric unit of length (length = distance between 2 points). Other metric units of length include mm, cm, km.                    Magic number = 10.  Ex: 1m = 10 dcm or 100 cm  or 1,000 mm
  

6th Grade -
Period 2- Answer these Analysis Questions from pg. A-20, 1-3:
"1. What changes did you have to make to your separation procedure while you were performing the procedure?  Why?
2. What safety precautions did you take while working with the unidentified mixture?
3. How would you separate:
    a. oil and vinegar?
    b. salt and iron shavings?
    c. salt and sand?"

Period 3 - write a hypothesis for your lab report on separating the mixture.

8th Grade - On a separate piece of paper, answer Question 1, p E-57: "The crash-test dummy that is most often used in frontal crash tests is the Hybrid III dummy.  It is 5 feet 9 inches tall, weighs 170 pounds (the size of an average man), and costs about $100,000. What are the advantages and disadvantages of using the Hybrid III in all vehicle crash tests?"

• Answer on a separate piece of paper
• using at least 3 complete sentences and
• using vocabulary from this lesson (engineering, sensor). As stated in the lesson (p. E-55),
• Crash test dummies are life-sized human dolls used as models for atual passengers, and
• sensors measure changes in motion and pressure to predict how badly people may be injured in a crash. 

Write and underline these definitions in your answer and receive up to 25% extra credit.

6th Graders - Period 2 - Write a reflection, at least 3 sentences long, in your science notebook about everyday examples of mixtures, both homogeneous and heterogeneous, using all 4 vocab terms from today's assignment. 

Period 3 - Write a reflection, at least 3 sentences long, in your science notebook about what you used to separate the mixture, using all vocab terms and the names of the equipment used.

8th Graders - Use the Study Guide to review your science notebooks in preparation for your test on 12/13.  



Example of a 3-way Venn Diagram. 
Ignore the information about "Sand and water, saltwater" and "How would you.."



8th Graders - Complete Three-Level Reading Guide: Decelerating Safely. Follow instructions, check off statements. Then turn the page over and answer Questions 2 (on a Separate Piece of Paper) and 3 (on the worksheet).

6th Graders - Draw a Venn Diagram: Mixtures vs. elements vs. compounds - how are they different and how are they the same? You should already have these, but add the examples to your definitions:

• Element - a pure substance that can not be broken down into any other substances. Ex: Oxygen (O), hydrogen (H), carbon (C).
• Compound - a pure substance made up of 2 or more elements chemically combined. A compound has different properties than the elements from which it is made. Ex: water (H2O); carbon dioxide (CO2).

 

8th graders - do your problems for Newton's Second Law:
Newton's 2d Law of Motion is F = m x a
To solve for force, plug the numbers into the formula and do the math.

Ex: What force is required to move a 3 kg box, accelerating it by 2 m/s2  ("s2" means "second squared")?
Answer) F = m x a
                  = 3 kg x 2 m/s2
                  = 6 kg m/s2
                  = 6N

Your turn: solve these problems in your science notebooks:

1) What force is required to move a 5 kg rock, accelerating it by 3 m/s2?

2) What force is generated by a 20 kg TV, accelerating it by 9.8 m/s2?

3) What force is required to move a 100 kg person, accelerating it by 2.5 m/s2?

4) What force is required to move a 2 kg bag, accelerating it by 1 m/s2?

5) What force is required to move a 0.2 kg ball, accelerating it by 5 m/s2?

6th Graders - Matter work sheet. Be sure to answer the questions on the back side of the page.