2. Teacher Page Second Grade, 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. Click to go to next screen.

3. Life Cycle Activity 1

4. Write one sentence for each picture, describing the change in each stage. Life Cycle of a Frog 1 2 34 5 Use words from the list to help you with your writing. legs adult egg tadpole tail lungs gills frog Answers next...

5. 1 2 34 5 The life of a frog begins when the tadpole hatches from the egg. Stage 1 Stage 2

6. 1 2 34 5 Stage 3 A tadpole has gills and swims in the water. Legs begin to develop.

7. 1 2 34 5 Stage 3 Stage 4 After a period of time the tadpole has fully developed legs and lungs.

8. 1 2 34 5 Stage 4 Stage 5 The tail is being absorbed and the frog is able to spend more time on land.

9. 1 2 34 5 Stage 5 The frog is fully developed and can live on land or in water. End of Activity