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Science Grade 2 Ginette Boudreau

Frogs. Science Grade 2 Ginette Boudreau. Objectives. Students will learn about: Amphibians A frog’s life cycle Metamorphosis and development of frogs Characteristics of frogs and tadpoles The needs of frogs and tadpoles. What do you know about. frogs?. Image: Microsoft clipart.

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Science Grade 2 Ginette Boudreau

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  1. Frogs Science Grade 2 Ginette Boudreau

  2. Objectives Students will learn about: • Amphibians • A frog’s life cycle • Metamorphosis and development of frogs • Characteristics of frogs and tadpoles • The needs of frogs and tadpoles

  3. What do you know about frogs? Image: Microsoft clipart

  4. Frogs are amphibians image: Photo courtesy of doc1975 forums.kingsnake.com/forum.php?catid=147,Retrieved May18,2009

  5. Amphibians… • are vertebrates- have backbones • live part of their lives in water and the other part on land • are cold blooded • return to the water to lay eggs.

  6. Other Amphibians Salamander Caecilian Monro,A. courtesy Natural History Museum, London. Retrieved May 17,2099 from news.nationalgeographic.com/.../photo3.html Orlov, N.  Retrieved May 18,2009 from www.livingunderworld.org/gymnophiona/database/

  7. What is metamorphosis? • It means change in appearance • It means transformation

  8. Mating In Spring • Males sing to attract a female • They often mate in the water • Females lay many eggs in the water • Males fertilize the eggs once they are laid Mating image:: Retrieved May 18, 2009l from the-reaction.blogspot.com/2007_03_11_archive.htm

  9. Eggs • Eggs are covered in a jelly substance • Found in water • Hatch in 6 to 21 days Startosta,P. (photographe of egg). (1991). La grenouille, Belgique,Éditions Milan

  10. Come out of the egg after 21 days Live underwater for 90 days Eat aquatic plants Breathe with their gills Tadpoles Startosta,P. (photographe of tadpole). (1991). La grenouille, Belgique,Éditions Milan

  11. During 90 days, the tadpoles will have a very interesting transformation called … metamorphosis

  12. Metamorphosis Day 1 Week 6 Week 10 Week 14 click Startosta,P. (photographe of life cycle). (1991). La grenouille, Belgique,Éditions Milan

  13. A Frog’s life cycle • Click on the link to watch a video of the frog’s life cycle • http://www.youtube.com/watch?v=5GGuEr-MQf4 Retrieved May 17 2009

  14. Tadpole: Development stages

  15. Frogs • Live in water and on land • Eat insects • Have 4 legs • Breathe with lungs • Do not have a tail • Swim and leap Farall,D.(photographe of a frog). GettyImages. Retrieved May 18,2009, from HowStuffworks

  16. Adult frog Frogs mate Eggs Tadpole

  17. Did you know… • When a frog swallows a meal, his bulgy eyeballs will close and go down into his head to push the meal down his throat! • Frogs are one of the best leapers on the planet! *Gulp* Image frog eating: soleilimg1.free.fr/gifs/gifs.php3?cat=animaux&scat=grenouille&suite=yes Image frog leaping: http://soleilimg1.free.fr/gifs/animaux/grenouille/greno067.gif

  18. Using the SmartBoard, let’s put an X to identify aspects of each:

  19. Answers:

  20. Well Done!

  21. How animals change • Click on the action button to see the changes that occur to different living things. • These are different life cycles Source: http://www.youtube.com/watch?v=xmsTccmRMh4&feature=related

  22. Resources taken from: • http://allaboutfrogs.org/weird/general/cycle.html (Did you know) • https://portal.nbed.nb.ca/tr/cd/Documents/,DanaInfo=portal.nbed.nb.ca,SSL+You%20and%20Your%20World%20Grades%20K%20-2%20English.pdf (NBED Curriculum) • http://www.youtube.com/watch?v=5GGuEr-MQf4 (video-how tadpoles change) • http://www.youtube.com/watch?v=xmsTccmRMh4&feature=related(animal life cycles)

  23. Resources for images • http://soleilimg1.free.fr/gifs/gifs.php3?cat=animaux&scat=grenouille&debut=60&nba=6&suite=yes (all clipart in this presentation) • Pictures in the presentation (see below picture for references)

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