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Natural sciences

Grade 8

Matter: classification

Module 14

The building blocks of matter

Class activity: experiments in a group context

Experiment 1:movement of particles in liquids

Put a small quantity of table salt in a test tube, add some water and shake.

1. What has happened to the crystals?

2. Taste the water. Is there any salt in it?

3. What would have happened if you had not shaken the test tube?

Make deductions by completing the following:

4. The table salt became invisible, but the salt was still in the

5. The salt particles moved in among the particles of water. We say that it has

6. Water and table salt both consist of

Experiment 2:movement of particles in liquids

Fill a glass beaker with water.

Use a drinking straw to gradually drop down potassium permanganate or food colouring into the water without agitating the liquid.

1. Observe what is happening and complete the series of sketches:

Figure 2

Figure 3

Make deductions by completing the following:

2. The potassium permanganate or colouring spreads out from where there was ..................... to where there was ..................... until there was an equal quantity of it everywhere.

3. Particles therefore move

4. Liquids are also made up of

Experiment 3:movement of particles in gases

Make deductions from the gas spraying demonstration by completing the following sentences:

1. Gas particles move from where there is ........................... gas to where there is less until it is evenly dispersed.

  1. Gases are therefore also made up of

Assessment of group work

Were you able to perform well in group work?

[LO 1.3]

Assessment of experimentation and deduction

Were you able to make correct deductions from the experiments?

[LO 1.2]


Learning outcomes 1: Scientific investigations

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.

We know this when the learner

1.2 is able to execute an investigation and collect data.

1.3 is able to evaluate data and communicate findings.



1. crystals dissolve

2. yes

3. You would see more crystals lying at the bottom.


  • water
  • dissolved
  • small particles



  • much – little
  • spontaneously
  • particles



  • much
  • particles

Questions & Answers

what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
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
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
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.
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
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
characteristics of micro business
for teaching engĺish at school how nano technology help us
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
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
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.
what is the actual application of fullerenes nowadays?
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.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
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.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Natural sciences grade 8. OpenStax CNX. Sep 12, 2009 Download for free at http://cnx.org/content/col11050/1.1
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