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S.1 Integrated Science Diversity of Living Things

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Chi-kit Wu
Chi-kit Wu

This document discusses the diversity of living things and their habitats. It states that scientists estimate there are between 4-12 million types of living things on Earth. These living things vary in size, body form, and structure. They live in different habitats like deserts, oceans, forests, and polar regions. Living things adapt to their habitats through body features and behaviors. The document also covers variations within living things and humans. It notes that variations can be continuous, like height, or discontinuous, like blood type. It concludes that we should respect and accept individual differences.

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SECONDARY ONE INTEGRATED SCIENCE Unit 2 Looking at living things 2.3 Diversity of living things Dec-2010
REVISION Do you remember what did we do in the last lesson? Observation of living things External features Behaviours
THE WIDE VARIETY OF LIVING THINGS How many kinds of living things can you find in this picture of showing a corner of a park?
THE WIDE VARIETY OF LIVING THINGS OK! Let me count how many living things! 5 10 There are at least 10 living things just at a corner of a park! Oh! I cant imagine how many kinds of living things in the world!
THE WIDE VARIETY OF LIVING THINGS Let me tell you the answer. Scientists estimate that there are 4 million to 12 million kinds of living things on Earth.
THE WIDE VARIETY OF LIVING THINGS WOW! However, I have a question. Why is the total number of kinds of living things on Earth only an estimate?
THE WIDE VARIETY OF LIVING THINGS It is because some living things cannot be seen directly and some of them live in the deep sea or hide themselves from human. So the exact number remains unknown.
THE WIDE VARIETY OF LIVING THINGS These living things differ in : size body forms body structure
THE WIDE VARIETY OF LIVING THINGS
LIVING THINGS AND THEIR HABITATS Natural environment where living things live http://www.youtube.com/watch?v=zNTHVLxPP54 Can you point out the habitats mentioned in the video?
LIVING THINGS AND THEIR HABITATS Behaviours Body feature s help living things to adapt to their habitats
IN THE FOREST some plants climb on tree trunks reach for more sunlight
IN THE GRASSLAND antelopes run fast escape from predators
IN THE DESERT cacti store a lot of water survive in dry environment
IN THE FRESHWATER STREAM webbed feet frogs ha ve webbed feet swim in water
IN THE OCEAN dolphins ha ve a streamlined body swim with little water resistance
IN THE POLAR REGION seals ha ve a thick la y er of fat under skin keep warm in cold environment
WHAT ELSE? Hong Kong Wetland Park http://www.wetlandpark.com/en/biodiversity/hab_fm.asp
ROLE PLAY 3 students Imagine you are a specified living thing and follow the instructions below. Do the suitable action (e.g. move slowly/ voice) Say the special feature(s) you have Choose the most favourable habitat for you to live Explain your choice
1. CAMEL (A) Grassland (B) Desert (C) Polar region
2. PENGUIN (A) Polar region (B) Rainforest (C) River
3. SHEEP (A) Ocean (B) Polar region (C) Grassland >
RECALLING YOUR MEMORY Worksheet of 2.2 Observing Living Things Question of finding differences between two tortoises Answers included Size Weight Pattern Colour Etc. Those differences are called variations
VARIATIONS The differences among the individuals of the same kind of living things
VARIATIONS Continuous Have a range of intermediate between two extremes. E.g. Height Discontinuous Have no intermediates. Either have the characteristic or dont. E.g. Blood type
CLASSROOM ACTIVITY 2.4 Variations within humans Can you roll your tongue? Do you have free or attached earlobes? Can you bend your thumb back? Measure your hand-span in cm. Draw a bar chart to show the distribution.
WHAT SHOULD WE LEARN FROM VARIATIONS? Not bad or good Everyone has his/ her own characteristics Respect and accept each other
SUMMARY Scientist estimate ( Ӌ ) 4 millions to 12 millions kinds of living things on Earth They are different in size, body form and body structure There are many habitats ( ) in the world where living things are living in Desert ( ɳĮ ) Ocean ( ) Forest ( ɭ ) Polar region ( O ) Etc. Living things adapt ( m ) the habitats by their body features and behaviours
SUMMARY Variations (  ) exist among the individuals of the same kind of living things. Continuous variations ( Bm ) Height Weight Discontinuous variations ( Bm ) Skin colour Blood type We should respect ( ) and accept ( Ӽ{ ) everyone.

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S.1 Integrated Science Diversity of Living Things

  • 1. SECONDARY ONE INTEGRATED SCIENCE Unit 2 Looking at living things 2.3 Diversity of living things Dec-2010
  • 2. REVISION Do you remember what did we do in the last lesson? Observation of living things External features Behaviours
  • 3. THE WIDE VARIETY OF LIVING THINGS How many kinds of living things can you find in this picture of showing a corner of a park?
  • 4. THE WIDE VARIETY OF LIVING THINGS OK! Let me count how many living things! 5 10 There are at least 10 living things just at a corner of a park! Oh! I cant imagine how many kinds of living things in the world!
  • 5. THE WIDE VARIETY OF LIVING THINGS Let me tell you the answer. Scientists estimate that there are 4 million to 12 million kinds of living things on Earth.
  • 6. THE WIDE VARIETY OF LIVING THINGS WOW! However, I have a question. Why is the total number of kinds of living things on Earth only an estimate?
  • 7. THE WIDE VARIETY OF LIVING THINGS It is because some living things cannot be seen directly and some of them live in the deep sea or hide themselves from human. So the exact number remains unknown.
  • 8. THE WIDE VARIETY OF LIVING THINGS These living things differ in : size body forms body structure
  • 9. THE WIDE VARIETY OF LIVING THINGS
  • 10. LIVING THINGS AND THEIR HABITATS Natural environment where living things live http://www.youtube.com/watch?v=zNTHVLxPP54 Can you point out the habitats mentioned in the video?
  • 11. LIVING THINGS AND THEIR HABITATS Behaviours Body feature s help living things to adapt to their habitats
  • 12. IN THE FOREST some plants climb on tree trunks reach for more sunlight
  • 13. IN THE GRASSLAND antelopes run fast escape from predators
  • 14. IN THE DESERT cacti store a lot of water survive in dry environment
  • 15. IN THE FRESHWATER STREAM webbed feet frogs ha ve webbed feet swim in water
  • 16. IN THE OCEAN dolphins ha ve a streamlined body swim with little water resistance
  • 17. IN THE POLAR REGION seals ha ve a thick la y er of fat under skin keep warm in cold environment
  • 18. WHAT ELSE? Hong Kong Wetland Park http://www.wetlandpark.com/en/biodiversity/hab_fm.asp
  • 19. ROLE PLAY 3 students Imagine you are a specified living thing and follow the instructions below. Do the suitable action (e.g. move slowly/ voice) Say the special feature(s) you have Choose the most favourable habitat for you to live Explain your choice
  • 20. 1. CAMEL (A) Grassland (B) Desert (C) Polar region
  • 21. 2. PENGUIN (A) Polar region (B) Rainforest (C) River
  • 22. 3. SHEEP (A) Ocean (B) Polar region (C) Grassland >
  • 23. RECALLING YOUR MEMORY Worksheet of 2.2 Observing Living Things Question of finding differences between two tortoises Answers included Size Weight Pattern Colour Etc. Those differences are called variations
  • 24. VARIATIONS The differences among the individuals of the same kind of living things
  • 25. VARIATIONS Continuous Have a range of intermediate between two extremes. E.g. Height Discontinuous Have no intermediates. Either have the characteristic or dont. E.g. Blood type
  • 26. CLASSROOM ACTIVITY 2.4 Variations within humans Can you roll your tongue? Do you have free or attached earlobes? Can you bend your thumb back? Measure your hand-span in cm. Draw a bar chart to show the distribution.
  • 27. WHAT SHOULD WE LEARN FROM VARIATIONS? Not bad or good Everyone has his/ her own characteristics Respect and accept each other
  • 28. SUMMARY Scientist estimate ( Ӌ ) 4 millions to 12 millions kinds of living things on Earth They are different in size, body form and body structure There are many habitats ( ) in the world where living things are living in Desert ( ɳĮ ) Ocean ( ) Forest ( ɭ ) Polar region ( O ) Etc. Living things adapt ( m ) the habitats by their body features and behaviours
  • 29. SUMMARY Variations (  ) exist among the individuals of the same kind of living things. Continuous variations ( Bm ) Height Weight Discontinuous variations ( Bm ) Skin colour Blood type We should respect ( ) and accept ( Ӽ{ ) everyone.