• Homework this weekend -  
• This is in preparation for the District Unit Assessment to be given on Thursday Dec. 19, 2013.  
• due on Monday or upon return to school: answer all questions to part 1 of our SMS Test Review Sheet, shown below:
• 
                 1.    Write 2 safety rules in a science lab:
  
  
  
  
  
  2.    What are hazardous materials?
   
  3.    Name and define three types of hazards that we focused on in class:
  a.    __________
  b.     ______________
  c.    ______________
  
  
  4. What is volume?    
  5.    How do you calculate volume? 
  a.    Write the formula for a rectangular solid
  b.    draw  a picture of a rectangular solid
  c.    showing its length, width and height including appropriate metric units for each
  d.    then apply the formula to find the solid’s volume.
  e.    for a cylinder the formula for volume is V = Pi x r² x H
  
  6. Read the Graduated cylinders below:
  
  
  
  7.    A) Explain what mass is:  
  
  
  B) for the example (the solid) that you drew in question 5, make up a mass including an appropriate metric unit.
  
  
  
  
  8.    How would you separate each of the following mixtures into parts?  You have a set of
  tools: strainer or sieve (screen), filter such as a funnel with filter paper, dropper and vial with top, forceps, magnet, heat source like a hot plate or sunlight). Which tools would you would use to separate the following mixtures?
    a.          macaroni from vegetable soup?
   b.        oil and vinegar?
   c.          Water and sand?
   d.          saltwater?
   e.          Little bits of dried sponge and of nickel (a magnetic metal);
   f.         Rocks and sand.
  
  
  9.    What is density?
  
  
  10. You have a solid object (ex: a pebble).  
  a.    If you drop the pebble in a graduated cylinder filled with water, what will
         happen to the pebble?______________________________________________
  
  
  b.    What does that tell you about the density of the pebble compared to the water?
  
  
  
  
  11. If you have 2 liquids in a bottle (ex: oil and vinegar), what will the less dense liquid do: float or sink in the other liquid?
  
  
  
  
  12.   What are properties?
  
  
  
  
  13.  Why are properties important in science?
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  14.  What are physical properties?  Give at least 3 different examples of physical properties.
  
  
  
  
  
  
  15.  What are chemical properties?  Give at least 2 different examples of chemical properties.
  
  
  
  
  
  
  16.  Acids and bases are corrosive chemicals that can react with and destroy metal and living tissue.  On a scale that runs from 0-14, pH is a measurement of how acidic (0-6 ) or basic (8-14 ) a solution is.   A solution that has a pH of 7 is neutral, meaning it is neither acidic nor basic.  Stronger acids have the lowest numbers, and stronger bases have the highest numbers.  What does the pH of a solution with pH 3 tell us?   The solution is ……
  
  
  
  
  17. How do you calculate density of a regular solid?  Use your examples from questions 5 and 6 to calculate the density of the solid that you described
  
  
  
  
  18. What is evidence?
  
  
  
  
  19. What are some hazardous substances that you can find in your home?
  
  
  20. If you found an unlabeled jar containing something that might be hazardous, what would you do?  
  
  
  21. How would you dispose of it?
  
  
  22.   What are some precautions you can take when you find an unknown substance in your home?