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The Life Cycle of a Frog

The Life Cycle of a Frog

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Author: Kristen Bowers
Description:

Student will learn about the lifecycle of a frog, they will watch a video, look at a web page about frogs, and then answer four questions about the life cycle of a frog.

Grade: 2nd Grade

Life Science:

2. Plants and animals have predictable life cycles. As a basis for understanding this concept:

a.Students know that organisms reproduce offspring of their own kind and that the offspring resemble their parents and one another. b. Students know the sequential stages of life cycles are different for different animals, such as butterflies, frogs, and mice.

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Tutorial

Big Question: What types of food does a Frog eat? How is this different or the same as a tadpole?

Please answer on your own piece of paper, and turn into teacher.

open player in a new window

Stages of a Frog Lifecycle

Stage 1: The Egg.

Frogs lay their eggs in wet or warm places. A clump of eggs that float is called frog spawn. The egg begins in a cell. Thousands of eggs can be laid at once.

Stage 2: The cell splits

The single cell in the egg splits in two. After this there are many cells in egg.

Stage 3: Embryo

All the cells in a egg form an embryo. Organs and gills begin to form at this stage.

Stage 4: The Tadpole

After 21 days in the developmental period, the embryo leaves its jelly shell, and attaches to weed in the water. Then it becomes a tadpole, which is a baby frog. This can happen in 3 days or up to 3 weeks. They eat small plants, The tadpole has a long tail, and lives in the water. After 5 weeks the tadpole begins to change and become more frog like. Sometimes they can come to surface of water and breathe air. Over time the tadpoles tail becomes much smalled, and their lungs are almost fully working in order to breathe outside of water.

Stage 5:

Eleven weeks after egg Is laid, fully developed frog with lungs, legs, and no tail comes out of the water. The tiny frog begins to eat insects and worms. The frog will mostly live on land, but can swim in the water sometimes.


http://allaboutfrogs.org/weird/general/cycle.html