# 3.1 Visualise and name 3-dimensional objects in the environment

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## Visualise and name 3-dimensional objects in the environment

Activity 1:

To recognise, visualise and name 3-dimensional objects in the environment [LO 3.1]

To describe, sort and compare them [LO 3.2]

Prisms, rectangular prisms, spheres, cylinders, pyramids, and other objects are found all round us.

1. Study the following three-dimensional objects in order to learn their names and be able to recognize and name similar objects in the world around us:

2. Objects in the world around us: now try to draw and name the 3-D objects:

 Item Drawing Geometrical name of the object Cricket ball Cube of sugar (lump) Tin of dog-food
 Ice-cream cone Box of matches Packet of cornflakes Triangular box of sweets

3. More shapes and objects.

3.1 Write each of the following solid objects under the correct geometrical heading: The sun; a string of spaghetti; a block of ice; an ordinary candle; the handle of a garden rake; a book; an orange; a brick; a block of margarine. Think of others and write them in the columns too, especially the columns that seem to be rather empty.

3.2 Compare your lists with those of your friends. If they have an item that you have not thought of, you may add it to your list.

 Sphere Cylinder Cube Cuboid (rectangular prism) Pyramid Cone

. Write the correct geometrical name next to each of the following:

• a block of flats
• the walls of a rondavel
• a wigwam/tepee
• the roof of a rondavel
• the stones at Stonehenge

5. Look at the objects again. How many surfaces are there? Are the surfaces flat or curved? What shape are the surfaces? Fill in the missing words to describe the objects:

 Object Number of surfaces Flat or curved surfaces Shape of surfaces A box of cornflakes A ball A cube of sugar A candle A pyramid Sides:Base:

Activity 2:

• To recognise, visualise and name 2-D shapes and 3-D objects in the environment [LO 3.1]
• To describe, sort and compare 2-D shapes and 3-D objects from the environment [LO 3.2]
• To make 2-D shapes, 3-D objects and patterns from tangrams [LO 3.5]
• Two-dimensional shapes are flat. We can draw them on a piece of paper . Polygons are all closed geometric shapes with straight sides.
1. Polygons : Use your pencil and ruler to practise drawing these.

3 sides: Triangles

5 sides: Pentagons (when all the sides are equal in length, it is a regular pentagon; if they are different lengths, it is an irregular pentagon)

6 sides: Hexagons

7 sides: Heptagons

(Try to draw one regular heptagon.)

2. Circles

2.1 Circles are not polygons. Look at the circle below and compare it with the polygons that we have discussed:

• Complete: The circle is not a polygon because __________________________
• Now try to think of an example of each shape that we have considered, in your environment. Remember, they must all be flat because they are two-dimensional. In each shape below, fill in the road signs that you have seen in the world around you and on the way to school.

3.1 The Circle

3.2 The Triangle

3.3 The Square

3.4 The Rectangle

3.5 The Octogon

4. Cut out the TANGRAM on the next page. Cut out all the shapes in it.

#### Questions & Answers

anyone know any internet site where one can find nanotechnology papers?
research.net
kanaga
Introduction about quantum dots in nanotechnology
what does nano mean?
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?
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
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
Do somebody tell me a best nano engineering book for beginners?
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
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
what is the Synthesis, properties,and applications of carbon nano chemistry
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
for screen printed electrodes ?
SUYASH
What is lattice structure?
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
what's the easiest and fastest way to the synthesize AgNP?
China
Cied
types of nano material
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
I'm interested in nanotube
Uday
what is nanomaterials​ and their applications of sensors.
how did you get the value of 2000N.What calculations are needed to arrive at it
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Read about ancient clocks like_ hour glass, water clock and sun dial for a quiz and hand on Activity in the class