Science Grade 2 Ginette Boudreau

ScienceGrade 2Ginette Boudreau

The Wonders of Frogs

Source for image: http://soleilimg1.free.fr/gifs/gifs.php3?cat=animaux&scat=grenouille&debut=60&nba=6&suite=yes

Objectives

Students will learn about: Amphibians Metamorphosis and development of

frogs A frog’s life cycle Characteristics of frogs and tadpoles The needs of frogs and tadpoles

Task 1 : Communication Skills

Task: 1. Find a partner and tell each other what you already know about frogs.

2. Continue reading the powerpoint.

Frogs are Amphibians…Frogs… 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

image: answersingenesis.org ,Retrieved January, 18 2011

What is Metamorphosis?

It means change in appearance It means transformation

Frogs go through an important physical change called metamorphosis

Frogs life cycleAdult frog

Frogs mate

Lay eggs

Tadpoles

Mating in the SpringIn Spring Males sing to

attract a female in the spring

They often mate in the water

Females lay many eggs in the water

Males fertilize the eggs once they are laid

Mating image:: Retrieved January 18, 2011 from the-reaction.blogspot.com/2007_03_11_archive.htm

Eggs in the water

Eggs are covered in a jelly substance

They are found in water Hatch in 6 to 21 days They become Tadpoles

Startosta,P. (photographe of egg). (1991). La grenouille, Belgique,Éditions Milan

Tadpoles Come out of the egg after 21 days Live underwater for 90 days Eat aquatic plants Breathe with their gills

Startosta,P. (photographe of tadpole). (1991). La grenouille, Belgique,Éditions Milan

During 90 days,the tadpoles will have a veryinteresting transformation called …

metamorphosisGuess what is the answer? Click and reveal

Metamorphosis

Day 1

Week 6

Week 10

Startosta,P. (photographe of life cycle). (1991). La grenouille, Belgique,Éditions Milan

Task

Task: In your art journal, draw what you think the tadpole will look like at week 14.

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

Frogs

Live in water and on land Eat insects Have 4 legs Breathe with lungs Do not have a tail Swim and leap

Source for image: http://soleilimg1.free.fr/gifs/gifs.php3?cat=animaux&scat=grenouille&debut=60&nba=6&suite=yes

Resources taken from: http://allaboutfrogs.org/weird/general/cycl

e.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) Retrieved on January 18, 2011

http://www.youtube.com/watch?v=xmsTccmRMh4&feature=related (animal life cycles)

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)