Living Things I

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Living Systems IV
Second Grade
Brenda Rone, Susan Gentry, and Bridgett
Niedringhaus Hazelwood School District
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These lessons are designed to reinforce State
Science Standard 3 VII Living Systems
A. Structure, Function, and Characteristics B.
Life Processes C. Diversity D. Reproduction E.
Adaptation and Evolution
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• Teacher Page
• Second Grade, Show Me Standard, Science 3
• The elements of Living Systems are integrated
  in the activities.
• We suggest that students keep a journal.
• It is critical for students to use writing skills
  to explain answers. When you see this
  symbol students should use their journals.
• Please take time to discuss possible answers.

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Life Cycle Activity 1
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Life Cycle of a Frog
Write one sentence for each picture, describing
the change in each stage.
Use words from the list to help you with
your writing.
legs adult egg tadpole tail lungs gills frog
Answers next...
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Stage 1
The life of a frog begins when the tadpole
hatches from the egg.
Stage 2
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Stage 2
A tadpole has gills and swims in the water.
Legs begin to develop.
Stage 3
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After a period of time the tadpole has fully
developed legs and lungs.
Stage 3
Stage 4
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The tail is being absorbed and the frog is able
to spend more time on land.
Stage 4
Stage 5
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Stage 5
The frog is fully developed and can live on land
or in water.
End of Activity