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Natural sciences

Matter, measuring and reactions

Educator section



Observation: The glowing wooden splinter catches fire because oxygen has been released.

Conclusion: Mercury oxide is a compound that decomposed as a result of heating. It broke up into oxygen (a gas) and mercury (a metal).

Mercury Oxide = mercury + oxygen

Leaner section


Activity: to investigate the breaking up of compounds into simpler substances [lo 1.2, lo 1.3]

Group work:

Do the following experiment in your groups to determine whether mercuric oxide is a compound consisting of elements. Follow the different steps exactly:

  • Pour a small amount of mercuric oxide, which is red in colour, into a test tube.
  • Heat it over a Bunsen burner or the flame of a candle in a well-ventilated room.
  • Wait for the mercuric oxide to turn black and for small droplets of mercury to collect on the cooler side of the test tube.
  • Insert a glowing splinter of wood into the top of the test tube. Observe the reaction that occurs.

Observation: _________________________________________________________



Deduction: __________________________________________________________




1-34% 1 Each learner learns individually. Participation in the group is destructive, e.g. domineering. No respect for others. Destructive interpersonal relationships (actively negative). Not able to come to meaningful observations and deductions.
35-39 % 2 Does not contribute to the group and forms no meaningful part of it. Not respectful towards others, but this does not affect interpersonal relationships (negatively passive). Observations and deductions fairly sound.
40-69% 3 Acknowledged as a member of the group. Sensitive to the needs of others. Shows consideration for others and understanding of different points of view, but this has no effect on interpersonal relationships (positively passive). Observations and deductions sound.
70-100% 4 Creates opportunities for contributions by other members of the group. Always contributes positively to the group task. Shows consideration for others and understanding of different points of view. Influences interpersonal relationships in a positive way (positively active). Observations and deductions excellent.


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;

Assessment Standard 1.3: We know this when the learner evaluates data and communicates findings: generalises in terms of relevant aspects and describes how the data support the generalisation.

Questions & Answers

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.
what is biological synthesis of nanoparticles
Sanket Reply
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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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