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Natural sciences

Ecosystems and the environmental balance

Educator section

Memorandum

CRITERIA 1 2 3 4
Creative layout
Meaningful illustrations
Completeness

Leaner section

Content

Activity: to classify animals according to their characteristics [lo 2.2]

Animals with a backbone or spinal column and an internal skeleton (endoskeleton) are placed in one group and animals without a backbone or a spinal column are placed in another group. Animals in the group with a spinal column are called vertebrates or Vertebrata. Animals in the group without a backbone or spinal column are called invertebrates or Invertebrata. The bodies of some of the Invertebrata are protected by a hard covering on the outside, e.g. the crab or the grasshopper. This hard covering is known as the external skeleton or exoskeleton.

An interesting question: fungi are not indicated as part of either the plants or the animals. Try to found out where they belong.

Assignment 4:

Study the following sketches and group the animals on the basis of the preceding diagram.

FISH __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
__________ __________ __________ __________ __________
CRITERIA YES/NO
Could classify animals easily ___________________________
Classified most animals correctly ___________________________
Require more exercise in classification ___________________________

(i) Criteria for sorting vertebrates

Vertebrates can be sorted on the basis of their type of body covering.

Assignment 5:

Consult the diagram once again and provide a diagrammatical representation of the various vertebrates with their specific body covering. Be creative and use illustrations as well as words.

Assessment

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

Assessment Standard 2.2: We know this when the learner categorises information.

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Source:  OpenStax, Natural sciences grade 6. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11079/1.1
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