Frogs go through four main stages in their life cycle: 1. Eggs are laid in water and hatch into tadpoles within 6 days. 2. Tadpoles live in water for 60-84 days, developing gills, a tail, and later back legs. 3. Over time the tadpole loses its tail and develops fully formed legs and lungs, allowing it to live on land. 4. The frog is now an adult that can live both on land and in water, breathing air through lungs rather than water through gills like the tadpole stage.

1. Life Cycle of a Frog
Write On
Grade 3 - 4

2. Learner Expectation
 Content Standard: 4.0 Heredity and Reproduction
 The student will understand the basic principles of
inheritance.
 Learning Expectations:
 4.1 Recognize that living things reproduce.
 4.2 Recognize that offspring tend to resemble their
parents.
 4.3 Recognize that the appearance of plants and
animals changes as they mature

3. In this activity you will:
 Learn about the life cycle of a frog.
 Learn about the changes that take place as
tadpoles change into frogs.

4. Life Cycle of a Frog: First Week
 A female frog lays
5,000 to 6,000 eggs in
water.
 Each egg is only 1.5
mm in diameter.
 When the eggs are 6
days old you can see
the tiny tadpoles inside
of the eggs.

5. Life Cycle of a Frog: 6-9 Days Old
 The tadpoles come out of
their eggs.
 They are now 8 mm long.
 They are adapted to living in
water.
 They take in oxygen from the
water through their gills.
 They have long tails to help
them move through the water
to hunt for food.

6. Life Cycle of a Frog: 60-84 Days Old
 The tadpole now has back
legs. It uses it’s legs and tail
to move around in the water.
 Its legs will help it move
around on land.
 It begins looking more like a
frog.
 The last thing to disappear is
the tadpole’s tail.
 It gets smaller and smaller
until it is gone.

7. Life Cycle of a Frog: Adult Frog
 An adult frog doesn’t
look anything like its old
tadpole self.
 Adult frogs breathe air
through lungs-not gills.
 They spend most of their
time on land-not in
water.
 They can jump on land
and swim in water.

8. The Life Cycle of a Frog:
Writing Activity
 Create a Four Square writing paper.
 Write a topic sentence that is appropriate for the
lesson about what you have learned about the Life
Cycle of a Frog.
 Write one detail in each square.
 Self edit and then exchange with a friend for peer
editing.
 Take it to paper.
 Draw a picture of an egg, a tadpole, and an adult
frog.