# 3.2 To discover the properties of materials  (Page 3/3)

 Page 3 / 3

_____________________________________________________________________

2. ___________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

ASSIGNMENT 7 (GROUP WORK)

• Now that you have seen how a sea breeze occurs, work out how a land breeze occurs. Sketch what happens and write down your explanation below.

The transfer of heat from the sun to the earth takes place through radiation.

Heat comes from the sun. Between the sun and the earth's atmosphere there is a vacuum. Heat transfer can't take place through conduction or convection.

Radiated heat from the sun reaches us after it has travelled through the atmosphere. Everything that the sun shines on is heated. However, as we go higher up in the atmosphere it becomes colder.

Requirements:

An electric heater

A windowpane

• Switch on an electric heater.
• Hold your hand 30 cm in front of the heater until you feel the heat.
• Put a windowpane between your hand and the heater.

What do you observe?

1. What happened when you put the windowpane in front of the heater?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

ASSIGNMENT 9: TO DEMONSTRATE RADIATION BY MEANS OF A LIGHT BULB

Requirements: Electric light bulb

Windowpane

4 Hold your hand 5 cm away from the light bulb. Switch it on.

4 When you feel the heat, place the windowpane between your hand and the light bulb.

What do you observe?

1. Does your hand immediately feel the heat?

_____________________________________________________________________

2. How does the heat reach your hand?

_____________________________________________________________________

3. Does the glass interrupt the radiation?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

5. MATERIALS CAN CONDUCT ELECTRICITY

Experiments have proved that the only solids that conduct electricity are metals and graphite. When electricity is conducted, electrons flow through the material but as there is no chemical reaction, no new substances are formed and the weight of the substance remains the same.

Pure water conducts electricity. The ability to conduct electricity increases if an acid is added to the water.

Electricity is a form of energy (like heat). It can be used to heat water and can even cause chemical reactions to take place.

The energy in an electrical current causes water molecules to break up.

It can be summarised like this:

This breaking up of the substance is called electrolysis.

• Open electrical wires are dangerous, especially if there is water nearby. Never touch electrical apparatus with wet hands.

Explain:

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

## Assessment

Learning Outcome 1: Learners respond confidently to their desire to learn about natural phenomena; they investigate relationships and solve problems within the context of science, technology and the environment.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: conducts simple tests or surveys and records observations or responses.

## Assessment

Learning Outcome 1: Learners respond confidently to their desire to learn about natural phenomena; they investigate relationships and solve problems within the context of science, technology and the environment.

Assessment Standard 1.2: We know this when the learner conducts investigations and collects data: conducts simple tests or surveys and records observations or responses.

Learning Outcome 2: Learners know, interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.1: We know this when the learner recalls meaningful information: at the minimum, describes the features which distinguish one category of thing from another.

Assessment Standard 2.3: We know this when the learner interprets information: at the minimum, interprets information by using alternative forms of the same information.

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
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
Privacy Information Security Software Version 1.1a
Good
Berger describes sociologists as concerned with
Got questions? Join the online conversation and get instant answers!