Math - 9f page 150 # 4,6,7,10, 13, 18 are due for next class. Students had class time to work on these.
9i - complete 13,14,18
Students are encouraged to draw the figures in their notebooks to help math corresponding sides. It might be useful to redraw some of the figures as two separate triangles when they might be shown together in the text.
Important to remember....
*the order is important, for example, if you start with the one you are looking for, go back to that figure for the numerator of the second fraction. Keep one fraction on the top and the other on the bottom!
* scale vs scale factor
scale is a ratio whereas scale factor will be one number. If it is made bigger (an enlargement), the scale factor is greater then one. If it is made smaller (reduction), the scale factor is less then 1.
Science
9j and 9i have been assigned 4.3 page 108. This should be done for next class. Some students finished in class time.
Students have outlines and should be reviewing. Students should come prepared with specific topics or questions regarding the exams.
Monday, January 17, 2011
Monday, January 10, 2011
Jan 10
Science - Quiz Tuesday 9 J and 9F on Chapter 3.
Math - 9f . Make sure 1,2 a,b,c 3 from "working together' and 1-4 from the bottom of the proportions sheet are done.
Example of expectation:
In a bag of red and green sweets, the ratio of red sweets to green sweets is 3:4. If the bag contains 120 green sweets, how many red sweets are there?
Step 1: Assign variables :
Let x = red sweets
Write the items in the ratio as a fraction.
Step 2: Solve the equation
Cross Multiply
4 × x= 3 × 120
4x=360
Isolate variable x
Answer: There are 90 red sweets.
Math - 9f . Make sure 1,2 a,b,c 3 from "working together' and 1-4 from the bottom of the proportions sheet are done.
Example of expectation:
In a bag of red and green sweets, the ratio of red sweets to green sweets is 3:4. If the bag contains 120 green sweets, how many red sweets are there?
Step 1: Assign variables :
Let x = red sweets
Write the items in the ratio as a fraction.
Step 2: Solve the equation
Cross Multiply
4 × x= 3 × 120
4x=360
Isolate variable x
Answer: There are 90 red sweets.
Friday, January 7, 2011
January 7
Science Review Questions for chapter 3 - Quiz Tuesday (possibly Wed for 9f, depending on how well the review goes on Monday)
page 100 2,3,4 6,7,8,9(very imp), 10 - do 1, 11- do 2, 12, 13, 15. Students should know the key terms but writing definitions at this point is not the best use of time.
Math - students should know the key terms for chapter 4 and have 1-9 completed on page 136. *** the bus is 4 cm!!
- outline for the exam have been give in class
page 100 2,3,4 6,7,8,9(very imp), 10 - do 1, 11- do 2, 12, 13, 15. Students should know the key terms but writing definitions at this point is not the best use of time.
Math - students should know the key terms for chapter 4 and have 1-9 completed on page 136. *** the bus is 4 cm!!
- outline for the exam have been give in class
Wednesday, January 5, 2011
January 5
Math - we have started ch4. Students should have the vocabuary words completed.9f - sheets completed except for the last page. 9i - #4,5,6 page 136.
Vocabulary listed below.
Science - students should review isotopes and radioisotopes from the text. Begin to review for the ch 3 test at the beginning of next week.
Exam reviews are on SAS
Vocabulary for chapter 4 (math)
Enlargement
• an increase in the dimensions of an object by a constant factor, can be 2-D or 3-D
Scale Factor
• the constant factor by which all dimensions of an object are enlarged or reduced in a scale drawing
Reduction
• a decrease in the dimensions of an object. Example a reduction of ½
Scale
• A comparison between the actual size of an object and the size of its image. This can be expressed as a ratio, as a fraction, as a percent, in words, or in a diagram. For example, a scale of 1 cm : 50 km on a map means that 1 cm on the map represents 50 km.
Scale diagram
• A diagram that is similar to the actual figure or object. It may be smaller than or larger than the actual object, but must be in the same proportions.
Proportion
• An equation that says that two ratios or two rates are equal. It can be written in fraction form ,or in ratio form .
Corresponding Angles
• Angles that have the same relative position in two geometric figures.
Corresponding Sides
• Sides that have the same relative position in two geometric figures.
Similar
• Figures that have the same shape, but different size. They have equal corresponding angles and proportional corresponding sides.
Polygon
• A two-dimensional closed figure made of three or more line segments.
Vocabulary listed below.
Science - students should review isotopes and radioisotopes from the text. Begin to review for the ch 3 test at the beginning of next week.
Exam reviews are on SAS
Vocabulary for chapter 4 (math)
Enlargement
• an increase in the dimensions of an object by a constant factor, can be 2-D or 3-D
Scale Factor
• the constant factor by which all dimensions of an object are enlarged or reduced in a scale drawing
Reduction
• a decrease in the dimensions of an object. Example a reduction of ½
Scale
• A comparison between the actual size of an object and the size of its image. This can be expressed as a ratio, as a fraction, as a percent, in words, or in a diagram. For example, a scale of 1 cm : 50 km on a map means that 1 cm on the map represents 50 km.
Scale diagram
• A diagram that is similar to the actual figure or object. It may be smaller than or larger than the actual object, but must be in the same proportions.
Proportion
• An equation that says that two ratios or two rates are equal. It can be written in fraction form ,or in ratio form .
Corresponding Angles
• Angles that have the same relative position in two geometric figures.
Corresponding Sides
• Sides that have the same relative position in two geometric figures.
Similar
• Figures that have the same shape, but different size. They have equal corresponding angles and proportional corresponding sides.
Polygon
• A two-dimensional closed figure made of three or more line segments.
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