The Life Cycle of a Frog By: Kathy Beebe

Standards and Objectives Content Area: Science Grade Level: 3 rd Summary: The purpose of this instructional PowerPoint is to help students explore the life cycle of a frog. Learning Objective: Upon completion of this PowerPoint, the student will label and describe the key events in the life cycle of a frog with 100% accuracy. Content Standard: GLE Identify the different life stages through which plants and animals pass. Accomplishment: The student will demonstrate a clear understanding of the key events in the life cycle of a frog.

Let’s begin by watching a short video that talks about what a frog goes through in its life cycle. Be sure to pay close attention to what the frog is called at each stage in its life cycle. Feel free to pause and replay the video as needed.

The First Stage: Eggs The first stage in the life cycle of a frog is eggs. The frog lays its eggs in water or a wet place. The floating clump of eggs is called frog spawn. The eggs are covered with a jelly-like substance. Some eggs will be eaten, but others will grow.

Stage 2: Tadpoles The embryo hatches from its jelly shell and attaches to a plant. It is now called a tadpole. The tadpole has a long tail and eats plants. It breathes underwater using gills.

Stage 3: Tadpole with Legs The tadpole begins to grow hind legs. Its gills slowly disappear and lungs develop. Its tail becomes shorter. Tiny buds appear that will become front legs.

Stage 4: Froglet The tail becomes even shorter. Gills are no longer present and the froglet uses its lungs to breathe on land. Front legs have developed and the froglet looks like a frog with a long tail.

Stage 5: Adult Frog The tail disappears. The lungs mature and the frog can breathe through them. The frog now spends most of its time on land but swims sometimes too. It looks for a mate and the process begins again.

Now that we have reviewed the life cycle of a frog and the important facts of each, let’s see if you can correctly label them. Please follow the links and try to correctly label the stages in order. w9/jun99/lifecycle2/cycle1.htm l ience/frog/life_cycle.jsp

Photo courtesy of ot.com/user_files/indi vidual_files/original_5 5536_QchwUyHQS3PI J090tEnqEO2AL.jpg

Now you have a more clear understanding of the life cycle of a frog. It begins when: 1.The mother frog lays her eggs. 2.The eggs hatch into tadpoles that use their gills to breathe and munch on underwater plants. 3.The tadpoles grow hind legs and gradually begin to lose their gills and lungs slowly form. 4.These tadpoles begin to grow front legs, their tails slowly start to disappear, and they begin to breathe using lungs. They are now called froglets. 5.Eventually, the tails disappear, they begin to spend most of their time on land, and breathe only using lungs as the gills have disappeared. They are now know as adult frogs.

Credits: 3 rd grade Science Standards- Frog Life Cycle Picture courtesy of inal_55536_QchwUyHQS3PIJ090tEnqEO2AL.jpg inal_55536_QchwUyHQS3PIJ090tEnqEO2AL.jpg Images of frog eggs, live tadpoles, froglets, and adult frog- K5 Computer Lab- Images of frog jumping, black tadpole, frog thinking, and frog on a lily pad-Microsoft Clip Art and Media- Information for slides provided by And