Age Problems Assignment

Complete the Age problems attached.


Age Problems
When solving age problems, you need to represent the following as a
variable:
- the present ages of the people or things involved
- the age, at the other specified time, of the people or things involved
Then, form an equation based on these representations.
For Example:
Cary is 9 years older than Dan. In 7 years, the sum of their ages will
equal 93.
Find both of their ages now.

	Age Now	Age Then
Dan	x	x + 7
Carey	x+9	x + 9 + 7 Sum=93

X= Dan's Age now so X+9 = Cary's Age now
X+7 = Dan's age in 7 years
X+9+7= Cary's age in 7 years
From the question we know that in 7 years, the sum of their ages
will be 93.
We'll use that to write our equation.
So: x+7 + x + 9 + 7 = 93
2x + 23 = 93
2x = 70
x = 35 That is Dan's age now. Because X is Dan's age now.
x+9= 44 That is Cary's age now.
 
1. Fred is 4 times as old as his niece, Selma. Ten years from now, he
will be twice as old as she will be. How old is each now?
 
2. An eagle is 4 times as old as a falcon. Three years ago,
the eagle was 7 times as old as the falcon. Find the present
age of each bird.
 
3. Brenda is 4 years older than Walter, and Carol is twice as old as
Brenda. Three years ago, the sum of their ages was 35. How old
is each now?

4. The present age of Jacob's father is three times that of Jacob. After
5 years, sum of their ages would be 70 years. Find their present ages.

5. After 15 years, Ariel's age will become four times that of her present
age. Find her age.

6. John's mother's age is 5 years more than the three times of John's
present age. Find John's present age, if his mother is 44 years old.
 
7. The present ages of Derek and Saniya are in the ratio 3:4. Five
 years from now, the ratio of their ages will be 4:5. Find their present ages.

Age Problems - Algebra

Complete the Age Problem questions handed out in class.
If you need assistance, try watching the video below:

http://www.youtube.com/watch?v=cLQtqANYg6U

You will review Age and Coin problems on Wednesday,
and write a quiz on these word problems on Thursday.

Coin Problems - Algebra

Watch the videos on solving coin problems and try the sample questions.

Remember that there are two kinds of coin problems:
Where they show  you a relationship between the number of
coins, eg. twice as many quarters  as dimes, and where you
have to create a relationship.  eg 10 coins in total.

For both of them create a chart.

http://www.onlinemathlearning.com/coin-problems.html

Math Review (One and Two Step Equations)

Here is the Answer Key for the Review assigned in class.

Solving One and Two step equations sometimes requires that you follow the distributive properties of multiplication. For example:
4(x-2)=16
distribute 4 through the brackets
4x-8=16  now add +8 to both sides to begin isolating x.
4x=24  divide both side by 4 to isolate x.
x = 6

Watch this video or this video to see the distributive properties of multiplication in action.

Math

Math Homework Due Tuesday Oct.15

Complete the working with decimals sction of the
booklet handed out in class. (to the end of page 61)

Math

Math - Order of Operations

Complete page 19 and 20 of the BEDMAS booklet on
exponents in order of operations. Check your
work in the back.

Be prepared for a mini quiz tomorrow.

Math

Math Homework October 1st. Due fro Wednesday.

Complete pages 15 and 16 of the Order of Operations
booklet. Be sure to check your answers with the key.

Math

Order Of Operations - Fractions

Complete worksheet F for Tuesday. For question #4,
be sure to complete(solve) the raised exponent before
applying it to the 4.

Math

Math Homework

Complete the Order of Operations for Fractions Worksheet.
Be sure to leave the answer as a Mixed fraction in lowest terms.
Eg. 12/5 should be reduced to 2 2/5

You will have a short entrance quiz on this on Monday.

Math

Math For Friday September 20th

Complete the Basic Operations booklet (every second column)

Be prepared to write an entrance quiz on Basic Operations:
Adding, Subtracting, Multiplying and Dividing

You will also be asked to solve these operations for intergers
(Positive and negative numbers)
Remember the rule for Multiplying and Dividing Intergers
(not for Adding and Subtracting though)

If the Signs are the same, the answer is positive
If the Signs are different, the answer is negative.

Math

Basic Math Skills

Complete the handout on Multiplying and Division for homework.
Remember to do the even numbered questions for the Multiplication,
and the odd numbered questions for the Division.

If you wish, you can try the Big Seven method for the Division.
Watch the video here. http://www.showme.com/sh/?h=lQrKUee
You can only use a calculator to verify your answer after you have attempted the whole sheet.

Math Homework

Today in class you were given two Sudokus. If you completed
one you have no homework. If you did not complete one of them
it is due for Friday.

Your Math puzzle is also due for Friday. Be sure to have
two copies. One to give to another student, and one
(with your explained solution to hand in to me.)

Math Puzzle

For Friday Sept. 13th. Find and master a Math Puzzle.
Present it in class. Be able to explain how it is solved.
Try to keep it at the level of your classmates.
If it requires a printout, please make two copies.
One with your explanation (to hand in), and one to give to a partner.

Possible sites: http://mathriddles.williams.edu/

http://mathforum.org/isaac/mathhist.html

http://www.rinkworks.com/brainfood/p/math1.shtml

http://www.barcodesinc.com/articles/math-logic-problems.htm

Math Review

Please review the following sections of the text, which can be found at
the link at the top right of this page. Also, review tests and entrance
quizzes. Answers pot the reviews can be found on the link at the top right
as well.

Review:
Page 82-83 Rational Numbers
Page 120-121 Exponents and order of operations
Page 160-161 Scale Factors
Page 200-201 Intro to Polynomials
Page 244-245 Linear Relations
Page 404-405 Circle Geometry
Page 444-445 Data Analysis

Keys for these reviews can be found under the Textbook Solutions tab as well.

The Sun

Read Pages 452 and 453. Complete questions 1-4 and #7

Science Homeworks

Read Pages 422, 424 to 428 and do questions 1 to 7, and # 9 on page 428
(for Monday)

Science Project

Senior1 Science Project - Astronomy
"The Solar System – Part 1"

 
In this project, you will be required to research trivia information for each of the planets in our solar system as seen / discussed in class or as researched from some other source.  This must include "at least" two interesting and unique facts about each planet that makes it different than any other planet.  For the purpose of this project, Pluto WILL NOT be included.
 
You need to include a simple title page for your project that contains the name of the project, your name and a simple picture of some sort. (Note: no pictures are required inside your project but they won't hurt.) Add a page with your sources.
 
Your project requires and will be marked on the following:
 
         A)  Project Presentation (not a PowerPoint, unless that is what you want) (appeal, originality and design)                4marks

         B)  Planet Info  (8 x 2)                                   16marks
 
 
Due:             Thursday,June 6, 2013
 
Value:         20 marks

Science

This next unit is about our Solar System. Please read pages 438-439 and do
questions 1-6 (skip 5). Then read pages 444-445, and do questions 1-6
(skip 5).

Science Electricity and Circuits

Homework:

Read pages 300 to 303 of the text.
Complete questions 1-5 , 7 on page 301 and
1-4 on page 303

Math and Science

Reminder that there is a Math Chapter Test on Graphing Linear Equations on Tuesday April 30th, and that those in Science have their Bohr Models due as well.

Electricity Unit

We will begin to study Electricity in this unit. To begin with you will notice that Electricity build upon what we learned about the Atom and Electrons. Begin by reading about the Electrical Nature of Matter on pages 272- 273 of the text book. Complete questions 1-4.

Next complete the following worksheet.

The Nature of Electricity

Visit the following site and find the answers to the questions:

http://science.howstuffworks.com/electricity-info1.htm

Put “The Electron Theory” into your own words.

______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

What is the difference between Static and Current Electricity? Name two types of electric current.

______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Explain what the difference is between Conductors and Insulators. Give examples of good and bad Conductors and Insulators.

________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

How Electricity is Produced

Explain common ways to produce Static and Current Electricity.

__________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Explain 4 Uses for electricity. Give an example of each.

_____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Units of Electricity

Explain the following units of measure of electricity:

The Volt (V)_________________________________________________________________________________________________________________________________________________________________________________

The Ampere (A) ____________________________________________________________________________________________________________________________________________________________________________________________________________________

The Watt (W) ___________________________________________________________________________________________________________________________________________________________________________________

The Ohm (W)_________________________________________________________________________________________________________________________________________________________________________________

The Hertz (Hz) __________________________________________________________________________________________________________________________________________________________________________________

Science Chapter Review- Matter and Elements

Review Chapter 3

Timeline of our understanding of elements pg 82-85

Democritus proposed that the smallest indivisible amount of matter that still retained the properties of that substance was an atom.

Alchemists: mixture of science and witchcraft. Tried to change lead into gold. Failed

Dalton: First to recognize Oxygen as an element. Believed every element had its own kind of atoms.

Thomson: Believed that the atom was made up of charged particles. Negative electrons were interspersed throughout the positive Nucleus. Kind of like a "Plum Pudding".

Rutherford: Believed that the Atom was mostly empty space. With a small compact Nucleus and electrons orbiting like planets.

Bohr: Created a model of the atom with a nucleus with Protons and Neutrons and a series of Electron orbiting around the nucleus.

Math- Chapter 6 - Linear Relations

Complete questions 4-12 on pages 239 - 241. Here is a link to the whole chapter.

Mendeleev and the Periodic Table

Visit the following YouTube link to watch how Mendeleev inveneted the periodic table.

Science - Periodic Table Assignment

Complete the table below using the link provided.

Math Homework April 10th

Complete the following Pages for homework for Wednesday, April 10th.
Do 1- 5 on Page 209
Do 1-4 on Page 211

 

 

Math Pages 196 and 197

Do questions 13 to 18 for Monday April 8th.

Review on Monday, Test on Tuesday.

 

Polynomial Assignment - Pages 180 and 181

Here are scans of the pages we have question on.

Math - Intro Polynomials

Here are the Key Ideas we have covered thus far on Intro to Polynomials.

Science Review - Cells and Reproduction

Chapter 6 - Scavenger Hunt Review


Be the first to find the answers to the following:


How is sexual reproduction different from asexual reproduction?

What is the function of DNA?

What is a Gamete?

What is a newly fertilized egg called?

What do you call a fertilized egg that has begun to divide and specialize?

What are heterozygous genes/ homozygous genes?

How many chromosomes pairs are there in humans?

What is Cloning? Explain how it is done in three or four sentences.

What is a Genotype? Phenotype?

What is meant by Haploid and Diploid?

Are gametes haploid or diploid? What about other human cells?

How does Sun radiation cause cancer?

How is binary fission similar to cloning?

What is DNA made of?

What does cytosine pair with? What does adenine pair with?

The process of cell division is called?

Science: Chapter 6 Review questions

Chapter 6: Review Questions page 198 and 199

2. DNA replication is required for cells to divide. The genetic material, is need to regulate cell activity, so it has to be found in each and every cell.

3. a) The process shown in figure 1 is DNA replication. The Strands of DNA have split and joined with new nitrogen bases to form a copy of the original.
b) The duplication of genetic material is needed for cell division, because both daughter cells have to have a copy of the DNA.

4. DNA molecules are shaped like twisted ladders. They are made up of three components – Sugar, phosphate, and amino acid

5. DNA replicates by unzipping and each strand bonding with free nitrogen bases to create two copies of the original ladder.

6. DNA Fingerprinting:
a)Remove DNA from the nucleus
b) Use special chemicals to cut the DNA apart. (kind of like scissors)
c) small segments of the DNA are placed on a gel and a small electrical current applied to them to get them to line up in bands.
d)These bands of DNA are matched up to known samples. If they match the samples, identity is confirmed.

7. Two methods of cloning plants:
Stem cuttings, Leaf cuttings, Leaf section cuttings, root division, runners, plant tissue culture (explain each of these)

8. Nuclear Transplanting in animals:
Scientists extract the nucleus from an unfertilized egg cell (making it an enucleated cell) by inserting a thin glass tube into the cytoplasm. Next, a nucleus from another animal's (donor) embryo (fertilized egg) in early stage of growth is extracted and placed into the enucleated egg cell. The cell will begin to grow with the new nucleus. This "diploid" cell is usually implanted into a "volunteer mother animal". It will develop as an embryo and be born as a copy of the donor.

9. In plants it can be observed that cells near the root tip grow at a faster rate than elongated cells elsewhere in the root.

10. Salamander cells are not as specialized as those of more complex animals. Cells that aren't as specialized are able to regenerate more easily than more complex cells.

11. Stem cells are immature (embryonic) cells that have not yet specialized. They have a much greater ability to divide than mature specialized cells.

12. Cancer cells divide much more rapidly than regular cells. Normal cells require cell to cell communication, but cancer cells can divide in isolation.

13. Three factors that cause or contribute to cancer development are:
Viruses, Radiation, and carcinogenic chemicals. All of these cause damage to the DNA changing the genetic message that controls cell division.

14. To reduce the incidence of cancer, you should stop smoking, eat a proper diet (reduce process foods and meat), reduce exposure to sunlight.

15. Prior to Dolly, scientists believed that cells that had specialized had lost their ability to be cloned. In the case of Dolly, a mature cell from one sheep was used to create a clone of the sheep.

16. The new Grafted tree might produce different types of fruit. The grafted tree may also be less susceptible to diseases that kill young trees, because the graft is made to a healthy mature tree.

17. The extract from the pine needles (and other plants) kill cells divide rapidly, but do not kill cells that are moderately active. Cancer cells are rapidly growing, so these kinds of chemicals would kill them.

Scale Reproduction Project

Reproduce the tripod shown with the measurements shown in the image. Use the scale shown in the image.

Math Assignment Scale

Please complete the following pages from your textbook. Refer to your handout if you are unsure what to do.

  

Grade 9 Math

Scale: Reductions and Enlargements

Complete questions 4 - 14 on pages 136 and 137. Use either a 1cm or .5 cm graph paper. If you don't have graph paper, you can print one out. Here is a link, or here.

    

 

Chapter 6 Science Review

Use the pages attached to answer these questions.

Complete questions 1- 17 of the Understanding Concepts. Use the text and
our own readings to help you answer these questions.

Complete questions 18 - 21 of Applying Skills.

  

For a refresher on DNA. visit the following website.

Math: Exponents Review

Complete the review of exponents on pages 120 and 121 of the text. Start
with Question 6 and skip #17.

   

Grade 9 Science: Meiosis Animation

Watch this great animation on Meiosis.

Grade 9 Science: Meiosis

Watch the following in video on Meiosis.

grade 9 Science: Mitosis

Watch the following video on Mitosis.

Grade 9 Science: Plant Cells

Watch the following video about Plant Cells.

Grade 9 Science: Animal Cells

Watch the short video on Animal Cells.