3rd Grade Reptilesand Amphibians.Hiawatha Teamppt


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  • After this visual presentation on Reptiles and Amphibians , Students Will Be Able to Describe the differences and the similarities between the two types of animals. WIDA 4 ,the Language of Science.
  • How do reptiles look like?
  • How many reptile species are there on earth?
  • What does vertebrate mean?
  • What kind of skin do reptiles have?
  • How do reptiles shed their skin?
  • I CAN Explain different types of reptiles shedding their scales.
  • I CAN Explain what does “Ectothermic “ mean.
  • I CAN Tell reptiles lay leathery shelled eggs.
  • Reptiles babies
  • I CAN Compare Alligator and Crocodile.
  • How many species and families of lizards?
  • What do they eat?
  • I CAN Tell the facts of snakes.
  • I CAN Compare Turtles to Tortoises.
  • How do amphibians look like?
  • How many species?
  • What does vertebrate mean?
  • What does ectothermic mean?
  • I CAN Describe amphibian skin.
  • What does “shed skin” mean?
  • Where do amphibians lay their eggs?
  • What does metamorphosis is?
  • I CAN Describe the metamorphosis stages.
  • I CAN Explain how amphibians grow.
  • I CAN Explain how salamander grow.
  • I CAN Compare Frog and Toad.
  • What does prehistoric mean?
  • I Wonder what were they?
  • Prehistoric time is interesting!
  • I CAN Guess.
  • I CAN MAKE PREDICTION by looking at the pictures.
  • I CAN Explain that turtles existed over 65 million years old by reading from the sources.
  • 3rd Grade Reptilesand Amphibians.Hiawatha Teamppt

    1. 1. I CAN Explain the differencesbetween Reptiles andAmphibians. A Presentation From: Living Desert Zoo and Gardens State Park Carlsbad, New Mexico
    2. 2. Reptiles
    3. 3. There are 6,800 reptile species on earth. The major reptile groups are: • Alligators and Crocodiles • Turtles and Tortoises • Snakes • Lizards
    4. 4. Reptiles are VertebratesThey have an internal skeleton with a backbone.
    5. 5. Reptiles Have Dry, Scaly SkinReptiles have tough, dry, scaly skin made of keratin (what fingernails aremade of) that protects them from drying out. The large scales of turtles,tortoises, and crocodilians are called scutes.
    6. 6. Reptiles shed their skin to grow bigger.Snakes shed their skin all in one piece, turning it inside out asthey shed. The skin is left in one piece and looks like a tube.An adult snake will shed two to five times a year. A youngsnake will shed more often as it grows faster. Corn Snake shedding its skinMost lizards shed their skin in pieces. That often begins withthe skin splitting down the lizard’s back. A rapidly growinglizard might shed every two weeks. Legless lizards shed their skins like a snake. Green Anole lizard eating its Leopard Gecko shed skin shedding its skin
    7. 7. Crocodiles and alligators have large scales (scutes), whichare shed individually . Scutes on a live Alligator Alligator Scute FossilsA turtle’s skin is shed like a lizard’s. The hard shells ofmost turtles are not shed. Instead new layers are added tothe underside of their shells. The age of the turtle can bedetermined by the number of rings on its shell’s scutes. Turtle Scutes
    8. 8. Reptiles are EctothermicMost reptiles are ectothermic - they use their environment to warm and cooltheir bodies. If they are cold, they must lay in the sun to raise their bodytemperature. If they get too hot, they must find shade to cool off. Manyreptiles are active at night, so they can avoid becoming too hot and havingtheir skin dry out.
    9. 9. SnakeLizard in egg Turtle Reptiles Lay Eggs Reptiles produce tough, leathery shelled eggs that keep moisture and warmth in and predators out. Most reptiles lay their eggs in a place where they will be kept warm and humid. Some reptiles keep their eggs inside their bodies and then give birth to live young. Most reptiles lay their eggs and then leave them.
    10. 10. Reptile Babies Look Like Little AdultsReptiles possess most of their adult characteristics at the timeof hatching. Unlike most amphibians, they do not undergo alarval stage or experience metamorphosis.
    11. 11. Is it an Alligator or a Crocodile? American Alligator American Crocodile •8 to 13 feet long •13 to 16 feet long •800 to 1,000 pounds (males) •800 to 1,100 pounds (males) •70 to 80 teeth •60 to 66 teeth •Broad, U-shaped snouts •Long, slender V-shaped snouts •Bottom teeth are not visible when •Lower teeth are visible when the the mouth is closed mouth is closed •Brown, gray, or nearly black •Dull grayish-green or olive-green color •Life span: 30 to 35 years •Life span: 60 to 70 years •Live mostly in fresh water swamps •Live in brackish and saltwater wetlands •Mothers assist babies in hatching. •Mothers assist babies in hatching. Young are Young stay with mother for a few ready to be on their own right away. months.  
    12. 12. LizardsThere are over 4,675 lizards species in six families: Geckos Iguanas Monitors Chameleons Gila Monsters Skinks
    13. 13. LizardsLizards have different types of diets. Some eat onlyplants (herbivores), some eat only insects or smallmammals (carnivore), and some eat both plants andanimals (omnivores).Some lizards (such as whiptails) lose their tails whenthey feel threatened. The lost tail distracts thepredator so the lizard can get away. The tail growsback later.Some lizards (Gila monsters) store foodin their fat tails.Some lizards (geckoes) have special feet which allowthem to hold on to walls, ceilings, etc.
    14. 14. Snakes• There are about 2,600 species of snakes.• Most snakes are not venomous. Northern Water Snake • All snakes can bite, swim, climb, • and drink water.• Snakes only strike people in self-defense.• Most baby snakes are able to care for themselves from the time they are born.• All snakes are carnivores (meat eaters).• Their hundreds of tiny vertebrae and ribs allow them to be very flexible.
    15. 15. Tortoises Turtles •are turtles that live on hot dry land, and•spend most of their lives in water. go to water only to drink or bathe.•have low domed shells. •mostly have high domed shells.•have webbing between their •have elephant shaped legs. toes for swimming. •have round stumpy feet for walking and•can be carnivores (meat), digging burrows.herbivores (plants), or omnivores •eat low growing shrubs, grasses,(both.) and cacti.•do not have teeth, but they have as •do not have teeth, but they do have a sharp beak.sharp beak.
    16. 16. Amphibians
    17. 17. There are about 4,000 species of amphibians. The major amphibian groups are:1. Frogs and Toads2. Salamanders3. Caecilians (she-SILL-yens)(a legless, salamander-type animal)
    18. 18. Amphibians are VertebratesThey have an internal skeleton and a backbone. Bull Frog Skeleton Toad Skeleton
    19. 19. Amphibians are EctothermicAmphibians are ectothermic - they use their environment to warm andcool their bodies. If they are cold, they must lay in the sun to raise theirbody temperature. If they get too hot, they must find shade to cool off.Many amphibians are active at night, so they can avoid becoming toohot and having their skin dry out. Couch’s Spadefoot Toad Green Frog Tiger Salamander
    20. 20. Amphibians Have Special SkinAmphibians have thin, permeable skin. This means the skin lets water passinto their bodies easily. Many amphibians don’t need to drink water.Animals that don’t live near the water absorb enough water from the moistsoil they live in. Their thin skin also allows them to absorb oxygen. This ishelpful for the animal because they have small lungs. Bull Frog Tiger Salamander
    21. 21. Amphibians Shed their Skin• Frogs, toads, and salamanders have thin skins thatthey shed regularly.• They shed their skin in one piece.• Once the skin is shed, they eat it!
    22. 22. Amphibians Lay Their Eggs in WaterAmphibian eggs don’t have shells. Instead they are protected by a clear,jellylike substance and must be kept it water or in wet conditions.
    23. 23. Amphibians Go Through MetamorphosisYoung amphibians do not look like they will when they are adults.Amphibian means "double life" in Greek. Most amphibians start lifein the water and then, through metamorphosis, develop into adultsthat live mostly on land.During metamorphosis the animals’ bodies will have many changes.
    24. 24. Metamorphosis of a FrogAdult frogs with spawn (jellylike eggs) Embryos beginning to split in two Tadpoles still in spawn The younger tadpoles still have their gills. The older tadpoles have lost their gills and are breathing with lungs.
    25. 25. The back legs have grown a little.The back legs are just starting to develop. The back legs are developed. This froglet is now 8 weeks old. It still has its tail, but it looks almost like an adult. The front legs are now present.
    26. 26. Salamander MetamorphosisSalamanders in eggs. Salamander with gills. Their heads are not as Salamander with gills. large as a frog tadpole. The front legs develop first. This adult salamander is now able to live on the land. Salamanders like to stay under moist leaves and rocks.
    27. 27. Frogs and Toads•Frogs have ridges along the sides of their •Toads have plump bodies with large glands on the sides ofbacks, narrower bodies and faces and largeeardrums. their faces.•They have moist, smooth skin. •They have dry, warty (bumpy) skin.• Frogs have teeth. •Toads do not have teeth.•They have long, powerful legs. Most frogshave webbed hind feet and pointed toes. •They have plump, shorter, less powerful legs (for walking).•They lay their eggs in clusters of single eggs. •They lay their eggs in long chains. A few toads give birth•They live mostly in water. to live young.•Their tongues are attached in the front of •They live on land as adults. Toads return to the water to laytheir mouths, so they can reach far to catch eggs.prey.•They jump long distances to get away from • Their tongues are attached at the back of the mouth.predators. •Toads have stronger poison glands for protection. In some•Most have mild poison glands, which don’t species, the poison is strong enough to kill dogs and cats.protect them much from predators.
    28. 28. Prehistoric Reptiles and AmphibiansMany prehistoric reptiles and amphibians became extinct thousands ofyears ago. By looking at the skeletons (fossils) of these animals, we have a good idea what they looked like. Many of today’s reptiles and amphibians look much like the prehistoric ones, but usually a lot smaller. Challenge: Use the prehistoric animal’s skeleton to determine what kind of animal it was. Answers are on the next slide. ? ? ? ? ? ? ?
    29. 29. What were they? Alligators? Frogs? Lizards? Salamanders? Snakes? Turtles?
    30. 30. Prehistoric This alligator lived in Colorado about 50 million years ago. Today This alligator from Floridagrew to be about 20 ft. in length. Today, the American Alligator grows to be 8 to 13 ft. long and weighs just over 1,000 pounds.
    31. 31. What was it? Alligator? Frog? Lizard? Salamander? Snake? Turtle?
    32. 32. Prehistoric Today This sand monitor from Australia weighs 13 lbs. and is 4.6 ft. long.This 80 million year old lizardfossil is from the Gobi Desert. This whiptail lizard lives in the Chihuahuan Desert and its body is 2 ½ - 4 in. long.
    33. 33. What was it? Alligator? Frog? Lizard? Salamander? Snake? Turtle?
    34. 34. Prehistoric TodayThis frog from Germany is 49 million years old.
    35. 35. What were they? Alligators? Frogs? Lizards? Salamanders? Snakes? Turtles?
    36. 36. Prehistori Today cThis Pachyrhachis problematicus was found in Israel. This boa constructor from Columbia is 13 ft. long and weighs 60 lbs. This Titanoboa cerrejonesis was foundin Columbia. Scientist believe it weighed 1,140 lbs. and was 42.7 ft. long.
    37. 37. What was it? Alligator? Frog? Lizard? Salamander? Snake? Turtle?
    38. 38. Prehistoric TodayThis prehistoric salamander from Tiger SalamanderGermany is almost 6 feet long and Today salamanders havelived nearly 280 million years ago. bodies that are from 4 to 8 inches long.
    39. 39. What were they? Alligators? Frogs? Lizards? Salamander? Snakes? Turtles?
    40. 40. Prehistoric This turtle from Kansas is over 65 The Meiolania was an 8.2 ft. long million years old.tortoise found in Australia. Its head was 2 ft. wide, which prevented it Today from being able to pull its head This alligator snapping turtle is one of completely into its shell. the largest freshwater turtles in the world. It can weigh up to 200 pounds.The Proganochelys quenstedtii was a3.3 ft. long turtle found in Germany. It had a long tail with spikes that it used as a club.