Skip to content Skip to navigation

Connexions

You are here: Home » Content » To investigate the breaking up of compounds into simpler substances

Navigation

Lenses

What is a lens?

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

This content is ...

In these lenses

Recently Viewed

This feature requires Javascript to be enabled.

Tags

(What is a tag?)

These tags come from the endorsement, affiliation, and other lenses that include this content.
 

To investigate the breaking up of compounds into simpler substances

Module by: Siyavula Uploaders. E-mail the author

NATURAL SCIENCES

Matter, measuring and reactions

EDUCATOR SECTION

Memorandum

Groupwork:

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

Content

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.
Figure 1
Figure 1 (graphics1.png)

Observation: _________________________________________________________

____________________________________________________________________

____________________________________________________________________

Deduction: __________________________________________________________

____________________________________________________________________

____________________________________________________________________

Figure 2
Figure 2 (graphics2.png)

Assessment

Table 1
MARK LEVEL COOPERATIVELEARNING SKILLS VALUES AND ATTITUDES CONTENT
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.

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;

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.

Content actions

Download module as:

PDF | More downloads ...

Add module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks