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Just in case you are wondering what MESS is about,
it is a collaborated educational blog.

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This blog is officially opened in 21 August 2009




-10 Recent Posts-
P6 Science Chapter 5: The Web of Life
P6 Science Chapter 4: Environmental Impacts
P6 Science Chapter 3: Forces
P6 Science Chapter 2: Forces of Energy & Conversion
P5 Chapter 7: Forces & Work Done
P5 Science Chapter 6: Electricity
P5 Science Chapter 4: Reproduction in Plants
Primary 5 Science Chapter 2 :Cells
P5 Science Chapter 1 :The Solar System
P4 Science chapter 7: Heat


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Thursday, August 27, 2009
P6 Science Chapter 6: Adaptation @ 7:36 PM

P6 Science Chapter 6: Adaptation

With adaptations, organisms can:
  • Get FAW
  • Cope w/ physical characteristics of enviroment
  • protect from predators
  • reproduce

Adaptations:

1) Structural

~Thick fur/ extra layer of fat under skin

~Closely packed feathers

~huge ears to lose heat

~Thin body covering

~ Big eyes w/ special cells sensitive to light

~Tendrils/Clasping roots to get sunlight

~Having air spaces in leaves and stems to keep afloat

~Large waxy Leaves

~Hairy leaf surfaces

2) Behavioural

~Hibernating

~Staying at a particular space

~Active during day and rest during night

~Climbing onto supports like fences, trees,etc

~Growing horizontally

~Drinking lots of water

~sweat & Urinate as little as possible

Ways of breathing:

  • Gills (tadpole, fish, prawn, dragonfly nymph)
  • Gill chamber (crab,mudskipper)
  • Skin (frog)
  • Blowhole (dolphin, whale)
  • Breathing tube (mosquito larva & pupa, water stick insect)
  • Air bubbles (Water spider & water beetle)
  • Breathing roots (Mangrove)


Types of Adaptation

1. Movement - Air

~ Wings, Flight muscles, Feathers, Hollow bones

Ø Wings: Birds that are heavy and have underdeveloped wings can’t fly(e.g. Ostrich, Emu, Goose, Chicken, Turkey)

Ø Flight Muscles: Allows birds to flap their wings

Ø Feathers: keep birds warm, ensure flight muscles work properly, waterproof

Ø Hollow bones: Reduce body weight

2. Movement – Water (to overcome water resistance)

~Streamlined body shape, Modified Limbs, Swim Bladder, Liver

Ø Streamlined body shape: Narrow at both ends, broad in middle

Ø Modified Limbs: Flippers (Sea Turtles, Seal), Fins & Tail (Fish), Oar-like legs (Water boatman), Webbed feet (goose, frog)

Ø Swim bladder: control the depth the fish wants to swim by varying th amt. of water held in its swim bladder

Ø Liver: Shark have huge livers which is filled with oil

3. Obtaining Sunlight

~Strong woody stems, creepers, climbers, aquatic plants

Ø Creepers: grow horizontally ___

Ø Climbers: tendrils/clasping roots

Ø Aquatic Plants: Float, large waxy leaves, sink beneath water surface when water is collected, air spaces

4. Breathing in Water

~Gills, Gill chambers, Air bubbles, Air Tube, Skin, Blowholes, Special Nostrils

Ø Gills(Fish, Shrimps, Tadpoles, Dragonfly Nymph, Shark)

Ø Gill Chambers: contains water w/ dissolved oxygen (Crab, Mudskipper)

Ø Air bubbles: Adapted wings/legs/hairy bodies to trap air bubbles (Water beetles, Water spiders)

Ø Air Tube(Mosquito larva & pupa, Water stick insect, Water scorpion)

Ø Skin (Tubifex worm, frog, flatworm, toad)

Ø Blowhole(Whales, dolphin)

Ø Special Nostril(Seal, Dugong)




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