25
What are the characteristics of amphibians?
2
Describe the characteristics of fish, birds and amphibians. Write sentences in your notebook.
... have ... ... are ... ... breathe ...
3
17
Listen and answer the questions.
a)
What do penguins use their wings for?
b)
How do ostriches move around?
4
Find out about frogs. Then, copy the sentences to describe the life cycle of frogs.
a)
The adult frog reproduces by laying eggs.
b)
Tadpoles hatch from the eggs. They have a tail but no legs. They have gills.
c)
Young frogs have four legs and a very short tail. They begin to develop lungs to breathe.
d)
The tadpoles grow two back legs.
5
Make a poster to show the life cycle of frogs. Include the information from Activity 4.
6
18
QUIZ
Check your learning.
A
C T I V I T I E S
Respiration
When amphibians are young, they
have gills to breathe in water. When
amphibians become adults, they grow
lungs, breathe air and live on land.
Extremities
Amphibians have
four legs. Many
also have a tail.
Reproduction
Amphibians
are oviparous.
Amphibian bodies
Amphibians have
thin, smooth skin.
In some areas, a metal
called lead pollutes the
soil. Lead is poisonous,
so some people grind fish
bones into a fine powder
and mix it with the soil.
The bone powder absorbs
the lead and makes the
soil safe.
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