Ch. 3 Sec. 3 Amphibians
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
 
What is an amphibian?
Characteristics of amphibians
<ul><li>ectothermic vertebrates </li></ul>
` <ul><li>2 loop circulatory system </li></ul><ul><li>3 chambered heart </li></ul><ul><ul><li>2 upper chambers= atria  rec...
amphibian =   double life
Amphibian reproduction <ul><li>metamorphosis </li></ul><ul><li>egg     tadpole   </li></ul><ul><li>(larva that swim &  </...
 
<ul><li>A tadpole’s circulatory system has a single loop & a heart with 2 chambers, like a fish. </li></ul>
Attributes of amphibians frogs & toads salamanders eggs fertilized externally internally  how obtain food wait for prey to...
frogs & toads <ul><li>adapted for hopping & leaping: </li></ul><ul><ul><li>strong skeletons </li></ul></ul><ul><ul><li>mus...
 
Frogs have smooth, moist skin.
 
 
Toads have drier, bumpier skin than frogs. Many toads have large lumps behind their eyes that ooze a poisonous liquid when...
Three groups of amphibians
red spotted newt
reasons for decreasing amphibian populations <ul><li>habitat  (specific environment in which an animal lives)  destruction...
Golden frogs are rarely seen anymore in their native habitat —the rain forests of Panama.   What are two possible causes f...
Discharge contaminated with coal combustion wastes.   Bullfrog tadpoles raised in a control habitat (A) and  in an area co...
On the hunt for hellbenders…
 
 
 
This  is  a  hellbender !
 
 
 
 
 
 
Red Cheeked Salamander
 
FROG, TOAD or SALAMANDER ?
FROG ,TOAD or SALAMANDER? have smooth, moist skin
FROG
FROG, TOAD or SALAMANDER? dry, bumpy skin
TOAD
FROG, TOAD or SALAMANDER? keep their tails as adults
SALAMANDER
FROG, TOAD or SALAMANDER? adapted for hopping & leaping
TOAD FROG &
FROG, TOAD or SALAMANDER? legs not adapted for jumping
SALAMANDER
FROG, TOAD or SALAMANDER? Actively stalk & ambush prey
SALAMANDER
FROG, TOAD or SALAMANDER? external fertilization
TOAD FROG &
FROG, TOAD or SALAMANDER? drier, bumpier skin
TOAD
<ul><li>Wait for prey to come close </li></ul><ul><li>(use camouflage) </li></ul>FROG, TOAD or SALAMANDER?
TOAD FROG &
What is the first stage of the frog life cycle?
<ul><li>The first stage of the frog life cycle is the  egg .  </li></ul>
What is the second stage of the frog life cycle?
The second stage of  the frog life cycle  is the  tadpole .
What is the last stage of the frog life cycle?
The last stage of the  frog life cycle is  the  adult frog .
 
frogs toads salamanders Front of paper 1.Groups of amphibians 2.Reproduction and Development 3. Obtaining Oxygen 4. Circul...
Chemicals cause tadpoles to be deformed. Back of paper 5. Obtaining Food 6. Movement 7. Amphibians in danger Name Date Sci...
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7th Grade Ch. 3 Sec. 3 Amphibians

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7th Grade Ch. 3 Sec. 3 Amphibians

  1. 1. Ch. 3 Sec. 3 Amphibians
  2. 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?
  4. 5. Characteristics of amphibians
  5. 6. <ul><li>ectothermic vertebrates </li></ul>
  6. 7. ` <ul><li>2 loop circulatory system </li></ul><ul><li>3 chambered heart </li></ul><ul><ul><li>2 upper chambers= atria receive blood </li></ul></ul><ul><ul><li>1 lower chamber= </li></ul></ul><ul><ul><li>ventricle - pumps blood  body </li></ul></ul>
  7. 8. amphibian = double life
  8. 9. Amphibian reproduction <ul><li>metamorphosis </li></ul><ul><li>egg  tadpole </li></ul><ul><li>(larva that swim & </li></ul><ul><li>have gills)  </li></ul><ul><li>adults- lose gills & </li></ul><ul><li>get lungs </li></ul>
  9. 11. <ul><li>A tadpole’s circulatory system has a single loop & a heart with 2 chambers, like a fish. </li></ul>
  10. 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
  11. 13. frogs & toads <ul><li>adapted for hopping & leaping: </li></ul><ul><ul><li>strong skeletons </li></ul></ul><ul><ul><li>muscular limbs </li></ul></ul>
  12. 15. Frogs have smooth, moist skin.
  13. 18. Toads have drier, bumpier skin than frogs. Many toads have large lumps behind their eyes that ooze a poisonous liquid when attacked.
  14. 19. Three groups of amphibians
  15. 20. red spotted newt
  16. 21. reasons for decreasing amphibian populations <ul><li>habitat (specific environment in which an animal lives) destruction </li></ul><ul><li>poisons in environment- </li></ul><ul><li>insecticides pollute water </li></ul><ul><li>weaken adult </li></ul><ul><li>kill eggs </li></ul><ul><li>deform tadpoles </li></ul>
  17. 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?
  18. 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
  19. 24. On the hunt for hellbenders…
  20. 28. This is a hellbender !
  21. 35. Red Cheeked Salamander
  22. 37. FROG, TOAD or SALAMANDER ?
  23. 38. FROG ,TOAD or SALAMANDER? have smooth, moist skin
  24. 39. FROG
  25. 40. FROG, TOAD or SALAMANDER? dry, bumpy skin
  26. 41. TOAD
  27. 42. FROG, TOAD or SALAMANDER? keep their tails as adults
  28. 43. SALAMANDER
  29. 44. FROG, TOAD or SALAMANDER? adapted for hopping & leaping
  30. 45. TOAD FROG &
  31. 46. FROG, TOAD or SALAMANDER? legs not adapted for jumping
  32. 47. SALAMANDER
  33. 48. FROG, TOAD or SALAMANDER? Actively stalk & ambush prey
  34. 49. SALAMANDER
  35. 50. FROG, TOAD or SALAMANDER? external fertilization
  36. 51. TOAD FROG &
  37. 52. FROG, TOAD or SALAMANDER? drier, bumpier skin
  38. 53. TOAD
  39. 54. <ul><li>Wait for prey to come close </li></ul><ul><li>(use camouflage) </li></ul>FROG, TOAD or SALAMANDER?
  40. 55. TOAD FROG &
  41. 56. What is the first stage of the frog life cycle?
  42. 57. <ul><li>The first stage of the frog life cycle is the egg . </li></ul>
  43. 58. What is the second stage of the frog life cycle?
  44. 59. The second stage of the frog life cycle is the tadpole .
  45. 60. What is the last stage of the frog life cycle?
  46. 61. The last stage of the frog life cycle is the adult frog .
  47. 63. frogs toads salamanders Front of paper 1.Groups of amphibians 2.Reproduction and Development 3. Obtaining Oxygen 4. Circulatory System
  48. 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
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