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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? _____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

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

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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