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FROG LIFE CYCLE INSTRUCTIONAL MATERIALS
GENERAL OBJECTIVES
To understand that all mammals have a life cycle that includes being born, developing into an adult, reproducing and eventually dying.
To understand that the details of life cycles vary from one organism to another.
To observe the changes that occur during the growth and development of frogs.
To sequence the stages of life of selected animals.
To develop their creativity.
To be able to write and trace words
FROG LIFE CYCLE WHEEL
HOW TO USE
Print, cut out and laminate the printable frog life cycle wheel. (or paste in card stock for durability)
Show each stage to your students and explain to them the development in each stage.
Print and give your students a copy and let them do their own frog life cycle wheel.
FROG LIFE CYCLE WHEEL
HOW TO USE
Print, cut out and laminate the printable frog life cycle wheel. (or paste in card stock for durability)
Show each stage to your students and explain to them the development in each stage.
Print and give your students a copy and let them do their own frog life cycle wheel.
LANGUAGE/ KEYWORDS
Here are some vocabulary words you may wish to spend time introducing to your students:
Life cycle - the series of changes in the life of an organism including, reproduction.
Amphibian - a cold-blooded vertebrate animal of a class that comprises the frogs, toads, newts and salamanders. They are distinguished by having an aquatic gill-breathing larval stage follows by a terrestrial lung breathing adult stage.
Herbivore - an animal that feeds on plants.
Frog - a tailless amphibian with a short squat body, moist smooth skin, and very long hind legs for leaping.
Froglet - a tiny frog that has recently developed from a tadpole.
Tadpole - the tailed aquatic larva of frog, breathing through gills and lacking legs until its later stages of development.
Frog egg - a mass of fertilized frog's eggs or developing tadpoles, each egg being surrounded by a protective nutrient jelly.
FROG LIFE CYCLE CARDS
STAGE 1: EGG - eggs are usually laid in or near water. A frog can lay thousands of eggs at once. The eggs are laid in large groups. They are covered and protected by transparent jelly.
STAGE 2: TADPOLES - a tadpole hatches from the egg. The tadpole breathes using gills and moves like a fish. It uses its long tail to swim. Tadpoles eat tiny water plants.
STAGE 3: FROGLET - it grows lungs and legs. Its gills disappear. Its tails get shorter until it disappears too. The froglet swims to the top of the water to breath air.
STAGE 4: FROG - a frog can leave the water and live on land. Its eats insects, worms and snails. Mother frogs return to the water to lay eggs and repeat the process.
HOW TO USE THE CARDS
These could be laminated back to back or individually.
Show each card to your students and explain each stage of the frog life cycle development.
FROG LIFE CYCLE WORKSHEET 1
Learning objective:
To identify the stages of a frog life cycle.
To identify the correct sequence of the life cycle of a frog.
To familiarize about the life cycle of a frog.
To develop coloring skill.
HOW TO USE
Print and give your students a copy. Tell your students to cut, color and paste the stages in the life cycle of a frog. Monitor your students while doing the activity.
FROG LIFE CYCLE WORKSHEET 2
Learning objective:
To identify the stages of a frog life cycle.
To identify the correct sequence of the life cycle of a frog.
To familiarize about the life cycle of a frog.
To develop coloring skill.
To develop writing skill.
HOW TO USE
Print and give your students a copy. Explain to your students the directions written in the worksheets. Monitor your students while doing the activity.
This could be a group or individual activity.
FROG LIFE CYCLE WORKSHEET 2
Learning objective:
To identify the stages of a frog life cycle.
To identify the correct sequence of the life cycle of a frog.
To familiarize about the life cycle of a frog.
To develop coloring skill.
To develop writing skill.
HOW TO USE
Print and give your students a copy. Explain to your students the directions written in the worksheets. Monitor your students while doing the activity.
This could be a group or individual activity.
FROG LIFE CYCLE BOARD GAME
Learning objective:
The student will be able to familiarize the terminology in the life cycle of a frog.
To be able to follow directions.
To identify the stages of the life cycle of a frog through game.
OVERVIEW
WHAT ARE FROGS?
Frogs are a kind of small animal belonging to a group called vertebrates (animal with backbones) known as amphibians. This means that they live part of their life in water and the other part of it on land. The word amphibian comes from 2 Greek words "amphi" which means "both"n and "bios" which means "life". Amphibians are cold-blooded animals. This means temperature is the same as the surrounding temperature. Their skin absorbs water into their body so they do not have to drink water to survive.
LIFE CYCLE OF A FROG
There are several stages in the life cycle of the frog. The life cycle continues over and over again.
STAGE 1: EGG
Many species lay their eggs in calm water among vegetation where the egg can develop in relative safety. The female frog lays numerous eggs in masses that tend to clump together ( these egg masses are referred to as spawn). They are covered in jelly which makes them slippery. The jelly protects them from the animal eating eggs.
In many species of frogs, the adults leave the eggs to develop without further care. But in a few species, parents remain with the eggs to look after them as they develop. As the fertilized eggs mature, the yolk in each egg splits into more and more cells and it hatch, and tiny tadpole breaks free of the egg.
STAGE 2: TADPOLE
A frog's larva is also called a tadpole. Tadpoles have rudimentary gills, a mouth, and a long tail. For the first week or two after the tadpole hatches, it moves very little. During this time, the tadpole absorbs the remaining yolk left over from the egg, which provides much needed nourishment. At this stage, tadpoles have rudimentary gills, a mouth and a tail. After absorbing the remaining yolk the tadpole is strong enough to swim on its own.
Most tadpoles are feed on algae and other vegetation so they are considered herbivores. They filter material from the water as they swim or tear away bits of plant material.
STAGE 3: FROGLET
As the tadpole continues to grow, it begins to develop hind limbs. Its body elongates and its diet grows more robust, shifting to larger plant matter and even insects. Later in their development, front limbs grow and their tail shrinks. Skin forms over the gills.
STAGE 4: FROG
Eleven weeks after the egg was laid, a fully developed frog with lungs, legs and no tail emerges from the water. This frog will live mostly on land, with occasional swims. The tiny frogs begin to eat insects and worms. Eventually, it will find a mate. The way this is done varies depending on the species. The female lays the eggs, the male fertilizes them, and the whole process begin again.
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