A photo sequence shows frog eggs → tadpole → tadpole with legs → young frog → adult frog → lays eggs. Which stage shows the frog beginning life?
- Young frog stage
- Cocoon stage
- Egg stage (correct answer)
- Adult frog stage
Explanation: This question aligns with the skill 3-LS1-1: Use models to show organism life cycle stages. Organisms go through stages from beginning life to death, including birth or hatching, growth, reproduction, and death or the cycle continues. In this frog photo sequence, the life cycle includes eggs, tadpole, tadpole with legs, young frog, adult frog, and laying eggs. The correct answer, egg stage, works because it correctly identifies the starting point where the frog begins its life in the model. The distractors fail because the adult and young frog stages come later, and the cocoon stage is from a butterfly's life cycle, not a frog's. To teach this, use visual models such as photo sequences or diagrams to show all stages clearly. Emphasize the sequence from beginning to reproduction, and compare frog life cycles to those of plants or insects to identify patterns like starting small, growing, changing, and reproducing.