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  • GETSenPhaseNS display tagshide tags

    This module and collection are included inLens: Siyavula: Natural Sciences (Gr. 7-9)
    By: Siyavula

    Module Review Status: In Review
    Collection Review Status: In Review

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Test your knowledge

Module by: Siyavula Uploaders. E-mail the author

NATURAL SCIENCES

Reactions that occur between different kinds of matter: acids and bases

EDUCATOR SECTION

Memorandum

1. Bitter; slippery/smooth

2. Yellow

3. Indicator

4. Alkali

5. Lime; neutralise

6. Saltpetre; phosphorous

7. Universal indicator

LEANER SECTION

Content

Activity: Test your knowledge [LO 2.1]

You may refer to the contents of the module to help you with the following closing exercises, which will serve as a summary of the main facts to be used when you prepare for the module test.

1. Bases taste __________________________ and feel ____________________

2. When the acidity or alkalinity of a substance has to be established, it can be

added to a Bromothymol blue solution. If the colour changes to__________________

we know that the added substance is an acid.

3. A _________________________ e.g. black tea, can also be used to establish whether a substance is an acid or a base.

4. When a little caustic soda is dissolved in water and a few drops of this solution

are placed on red litmus paper the paper will become blue. This indicates that

caustic soda is_________________________________________________________

5. Most crops, and vegetables in particular, need neutral soils for optimal growth.

If the soil contains too much acid, farmers add __________________________to the

soil to _______________________________________________ the acid in the soil.

6.___________________________________________ acid is present in plastics and

________________________________________ acid is used to flavour cold drinks.

7. A ________________________ is used to determine the level of alkalinity or acidity in substance.

Assessment

Learning Outcome 2: The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard 2.1: We know this when the learner recalls meaningful information: the minimum requirement is an ability to recall definitions and complex facts.

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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.

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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