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Mathematics

More geometry, data handling and probability

Educator section

Memorandum

14.1 – 14.5 Check learner’s efforts

14.4 Fanta

14.5 R25,00

15.1 (a) half past eight

(b) 1 hour 40 min

(c) 53 min

(d) half past six

(e) 55 min

(f) 18 hours

15.2 (a) 14 000 km

(b) 14,7 hours

(c) approximately 7 200 km

(d) 600 km/h

(e) approximately 49 and a half

(f) 12 hours 47 min

(g) 08:05

(h) 07:05

(i) “Daylight saving” –use as much sun as possible.

(j) USA

Leaner section

Content

Activity: own representation of data [lo 5.5, lo 5.8, lo 5.9, lo 4.1]

14. OWN REPRESENTATION OF DATA:

14.1 Vusi, a learner in Grade 7, was seriously sick and had to go to hospital. The nurse took his temperature regularly

08:00 37,8º

10:00 38,2º

12:00 38,4º

14:00 37,6º

16:00 38º

18:00 39,2º

20:00 38,8º

  • Represent the information on a line graph.

14.2 In a certain town water is consumed as follows:

gardening 32%

laundry and dishes 15%

toilets 28%

bathing 20%

cooking and drinking 5%

  • Represent the information by means of a pie graph

14.3 During the election of prefects at Sunshine Primary School, Stephanie received 80 votes, Tamara received 120 votes, Buck 60 votes and Sean 140 votes.

  • Draw a pictogram to indicate the position of the votes.

14.4 Draw a column/bar graph to represent the sales of cool drink during the year:

Lemonade 22 000 litres

Fanta 38 000 litres

Coke 45 500 litres

Cream soda 20 500 litres

Tab 43 250 litres

  • The sales of which cool drink are the closest to the average sales of all the cool drinks?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

14.5 BRAIN-TEASER!

  • Can you show the following information on the same graph?

Jan Feb Mar Apr May

Jan Feb Mar Apr May
Price of Cheddar cheese per kg R12.50 R15.00 R12.50 R17.50 R22.50
Price of Sweet milk cheese per kg R17.50 R22.50 R12.50 R20.00 R25.00

(Hint: draw up a double column graph!)

  • Why, do you think, does the price vary from month to month?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

  • How much more would you have paid for Sweet milk cheese in February than in January?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

15. INTERPRETATION OF DATA

15.1 Look at the TV guide and answer the following questions.

a) At what time can you look at the aerobic exercises? _____________________

b) How long is the drama “Deep in my Heart”? ___________________________

c) How long is the program “Once and Again”?___________________________

d) At what time can you watch Big Brother II____________________________

e) How long must you wait after “What women want” before you can watch KTV _______________________________________________________________

f) How long is the whole broadcast on this particular day? __________________

g) How much time do YOU spend every day, on average, watching TV? ______

15.2 Study the world map and the given scale and determine:

a) What is the distance from Cape Town to New York? ____________________

b) If an aeroplane flies at 950 km/h, how long is it going to take for you to fly form Cape Town to New York? ___________________________________________

c) How far is it form Perth to Los Angeles? ______________________________

d) At what speed are you travelling if it takes you 12 hours to cover the distance at c? _________________________________________________________________

e) If you could walk at a speed of 8 km/h from Tokyo to London, then about how many days will it take you to complete the distance? __________________________

f) If you leave Cape Town at 20:18 and arrive in London the following morning at 09:05 (S.A. time), how long does your journey last?_________________________

g) What time will it be in England (March to September)?___________________

h) What time will it be in England (September to March)?___________________

i) Why does England adapt her time in this way? _________________________

_______________________________________________________________

j) Where else in the world is time also adapted in this way? ________________

Assessment

Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.

Assessment Standard 4.1: We know this when the learner solves problems involving time, including relating time, distance and speed;

Learning Outcome 5: The learner will be able to collect, summarise, display and critically analyse data in order to draw conclusions and make predictions, and to interpret and determine chance variation.

Assessment Standard 5.5: We know this when the learner organises (including grouping where appropriate) and records data using tallies, tables and stem-and-leaf displays;

Assessment Standard 5.8: We know this when the learner draws a variety of graphs by hand/technology to display and interpret data (grouped and ungrouped);

Assessment Standard 5.9: We know this when the learner critically reads and interprets data presented in a variety of ways to draw conclusions and make predictions sensitive.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Mathematics grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11075/1.1
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