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Mathematics

Having fun with pocket calculators and negative numbers

Educator section

Memorandum

  • <
  • –30 degrees Celsius = -22 degrees Farenheit

21. a) Storm petrel en king penguin

  1. No

c) I) 75 degrees

Il) 50 degrees

  • 70 degrees

d) No. Can not survive in temperatures below freezing point.

  1. No. Can not survive in tempretures less than -10 degrees.
  2. -125 degrees

22. x = 12; 3

x – 9 + 4: 0; -8; -12; -23

Leaner section

Content

Activity: temperatures [lo 2.6, lo 2.1]

20. DID YOU KNOW?

Water freezes at 0°C and boils at 100°C. A Swedish astronomer discovered the Celsius scale. Examine the difference between the Celsius scale and the Fahrenheit scale.

20.1 Fill in:<;>or = : -30 ........ -22

20.2 According to the thermometer on the previous page -30°C = -22°F. Explain how this is possible.

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21. Look at the maximum and minimum temperatures that these living organisms are able to withstand. Then answer the questions that follow.

a) Who / what can survive at -60°C? ___________________________________

b) Can an earthworm survive temperatures below freezing point?

_____________________________________________________________________

c) What is the difference between the minimum and maximum temperatures at which the following living organisms can exist?

i) storm petrel ____________________________________________________

ii) housefly _______________________________________________________

iii) king penguin ___________________________________________________

d) Will a garden snail be able to survive in London in December?

_____________________________________________________________________

Motivate your answer.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

e) Do you think that you will find many houseflies around the North Pole? _____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

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Motivate your answer.

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

f) Take another look at the illustration. What is the sum of the minimum temperatures for all the organisms?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

22. Can you complete the following table?

x 5 –3 –7 –18
x - 9 + 4 7 –2

Assessment

Learning Outcome 2: The learner will be able to recognise, describe and represent patterns and relationships, as well as to solve problems using algebraic language and skills.

Assessment Standard 2.1: We know this when the learner investigates and expands numeric and geometric patterns looking for a relationship or rules, including patterns;

Assessment Standard 2.6: We know this when the learner describes a situation by interpreting a graph of the situation, or draws a graph from a description of a situation (e.g. height of a roller-coaster car over time; the speed of a racing car going around a track).

Questions & Answers

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
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
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
How can I make nanorobot?
Lily
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
how can I make nanorobot?
Lily
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
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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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