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Natural sciences

Matter, measuring and reactions

Educator section

Memorandum

1. My method:

Area = l × b

= 6 cm × 10 cm

= 60 cm 2

2. A = ℓ × b

Area = length multiplied by width

One also uses this formula to determine the area of a rectangle.

3. 25 cm 2

Leaner section

Content

Activity: to determine surface measurements by means of measuring and calculation [lo 1.2]

You have probably heard people referring to the size of a house as equal to 150 square meters (150 m²). Do you know what is meant when people speak of square metres?

Examine the sketch:Each square of the grid represents one square metre. A square metre is a four-sided plane geometric figure having four equal sides of 1 metre in length.When we say that the surface of fig. X is 100 m², we mean that we can fit one hundred single m² into it. One could count the number of squares in the grid, or block, to find out what the size of the surface is, but there is a quicker method for finding the answer.If the length of each side of the larger surface is 10 m, you could calculate the number of blocks (square metres) that can fit into the larger surface area (100) by multiplying the length of the one side (10 m) by the length of the other side (10 m x 10 m = 100 square metres).

1m 2 1m 2 1m 2 1m 2 1m 2 1m 2 1m 2 1m 2 1m 2 1m 2
1m 2
1m 2
1m 2
1m 2
1m 2
1m 2
1m 2
1m 2
1m 2

Fig. X

1. How would you determine the surface area of the following rectangle?

(Each block is 1 cm²)

The length of this rectangle is 100 mm and the breadth is 60 mm.

My method:

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_____________________________________________________________________

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_____________________________________________________________________

_____________________________________________________________________

(5)

2. What is the meaning of the following formula: A = ℓ b?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

3. Apply the following formula to determine the surface area of the given triangle:

b represents the length of the base

h represents the height of the perpendicular line

  • My answer (estimated):______________________________________________
  • My answer (calculated according to the given formula):____________________

(2)

Assessment

Learning Outcome 1: The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: organises and uses apparatus/equipment or sources to gain and record information.

Questions & Answers

anyone have book of Abdel Salam Hamdy Makhlouf book in pdf Fundamentals of Nanoparticles: Classifications, Synthesis
Naeem Reply
what happen with The nano material on The deep space.?
pedro Reply
It could change the whole space science.
puvananathan
the characteristics of nano materials can be studied by solving which equation?
sibaram Reply
plz answer fast
sibaram
synthesis of nano materials by chemical reaction taking place in aqueous solvents under high temperature and pressure is call?
sibaram
hydrothermal synthesis
ISHFAQ
how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
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
has a lot of application modern world
Kamaluddeen
yes
narayan
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
STM - Scanning Tunneling Microscope.
puvananathan
How we are making nano material?
LITNING Reply
Some times this process occur naturally. if not, nano engineers build nano materials. they have different physical and chemical properties.
puvananathan
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Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
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