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7th Grade Ch. 3 Sec. 3 Amphibians
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7th Grade Ch. 3 Sec. 3 Amphibians

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  • 1. Ch. 3 Sec. 3 Amphibians
  • 2. Camouflage Activity 6 32 6 4 32 5 3 6 4 4 32 3 3 31 2 8 40 1 # of green toothpicks Total # of toothpicks Table
  • 3.  
  • 4. What is an amphibian?
  • 5. Characteristics of amphibians
  • 6.
    • ectothermic vertebrates
  • 7. `
    • 2 loop circulatory system
    • 3 chambered heart
      • 2 upper chambers= atria receive blood
      • 1 lower chamber=
      • ventricle - pumps blood  body
  • 8. amphibian = double life
  • 9. Amphibian reproduction
    • metamorphosis
    • egg  tadpole
    • (larva that swim &
    • have gills) 
    • adults- lose gills &
    • get lungs
  • 10.  
  • 11.
    • A tadpole’s circulatory system has a single loop & a heart with 2 chambers, like a fish.
  • 12. Attributes of amphibians frogs & toads salamanders eggs fertilized externally internally how obtain food wait for prey to come close (use camouflage) actively stalk & ambush prey movement 1. powerful hind leg muscles 2. skeleton that can absorb shock of landing crawl
  • 13. frogs & toads
    • adapted for hopping & leaping:
      • strong skeletons
      • muscular limbs
  • 14.  
  • 15. Frogs have smooth, moist skin.
  • 16.  
  • 17.  
  • 18. Toads have drier, bumpier skin than frogs. Many toads have large lumps behind their eyes that ooze a poisonous liquid when attacked.
  • 19. Three groups of amphibians
  • 20. red spotted newt
  • 21. reasons for decreasing amphibian populations
    • habitat (specific environment in which an animal lives) destruction
    • poisons in environment-
    • insecticides pollute water
    • weaken adult
    • kill eggs
    • deform tadpoles
  • 22. Golden frogs are rarely seen anymore in their native habitat —the rain forests of Panama. What are two possible causes for the decrease in the number of golden frogs?
  • 23. Discharge contaminated with coal combustion wastes. Bullfrog tadpoles raised in a control habitat (A) and in an area contaminated with coal combustion wastes (B & C). Vitamin A compounds in lake water may be at least partly responsible for frog deformities. Effects of toxins in the environment Deformed frog photos
  • 24. On the hunt for hellbenders…
  • 25.  
  • 26.  
  • 27.  
  • 28. This is a hellbender !
  • 29.  
  • 30.  
  • 31.  
  • 32.  
  • 33.  
  • 34.  
  • 35. Red Cheeked Salamander
  • 36.  
  • 37. FROG, TOAD or SALAMANDER ?
  • 38. FROG ,TOAD or SALAMANDER? have smooth, moist skin
  • 39. FROG
  • 40. FROG, TOAD or SALAMANDER? dry, bumpy skin
  • 41. TOAD
  • 42. FROG, TOAD or SALAMANDER? keep their tails as adults
  • 43. SALAMANDER
  • 44. FROG, TOAD or SALAMANDER? adapted for hopping & leaping
  • 45. TOAD FROG &
  • 46. FROG, TOAD or SALAMANDER? legs not adapted for jumping
  • 47. SALAMANDER
  • 48. FROG, TOAD or SALAMANDER? Actively stalk & ambush prey
  • 49. SALAMANDER
  • 50. FROG, TOAD or SALAMANDER? external fertilization
  • 51. TOAD FROG &
  • 52. FROG, TOAD or SALAMANDER? drier, bumpier skin
  • 53. TOAD
  • 54.
    • Wait for prey to come close
    • (use camouflage)
    FROG, TOAD or SALAMANDER?
  • 55. TOAD FROG &
  • 56. What is the first stage of the frog life cycle?
  • 57.
    • The first stage of the frog life cycle is the egg .
  • 58. What is the second stage of the frog life cycle?
  • 59. The second stage of the frog life cycle is the tadpole .
  • 60. What is the last stage of the frog life cycle?
  • 61. The last stage of the frog life cycle is the adult frog .
  • 62.  
  • 63. frogs toads salamanders Front of paper 1.Groups of amphibians 2.Reproduction and Development 3. Obtaining Oxygen 4. Circulatory System
  • 64. Chemicals cause tadpoles to be deformed. Back of paper 5. Obtaining Food 6. Movement 7. Amphibians in danger Name Date Science Pictures of Ch. 3 Sec. 3 Subheadings