6172RB Science a STEM approach Year 2 low res watermark

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Lesson 5 Biological sciences GROWING AND CHANGING Teacher notes Science inquiry focus: How do the offspring of frogs grow and change? Science Inquiry Skills: • Questioning and predicting QP • Planning and conducting PC • Processing and analysing data and information PA • Evaluating E • Communicating C Science as a Human Endeavour: • Students act like scientists when they make observations, ask questions and describe the growth of an animal. Technology/Engineering/Mathematics links: • viewing an interactive video online • entering a URL address correctly in order to download a file • researching online Background information • Some animals, like the frog, undergo a series of big changes as they become adults. The offspring do not resemble the adults. • Frogs start their lives as eggs which are laid in water. The eggs then hatch into tadpoles which live underwater and have gills but no legs. They swim using their tail. Then they form back then front legs. Once they have grown all four legs they are known as froglets. They still have a tail but they breathe with lungs. Finally, the tail and gills disappear and the froglet becomes a frog. It leaves the water to live on the land. • This lesson is to highlight that some living things do not look the same as an offspring as they do as an adult. They do, however, have predictable stages of development and observable changes. It is not meant to go too in depth into life cycles as this is covered in Year 4. Assessment focus: • Use page 20 as a formative assessment of the student’s ability to identify that a frog goes through a series of predictable changes as it becomes an adult frog and looks different at each stage. • Observe student discussions in Step 5 to gauge their ability to evaluate their results and find information to clarify the answers. Resources • Science up close video about amphibians at • Access to computers/ computer lab (the file types do not play on iPads®) • Life cycle of a frog file download at • Sufficient copies of page 20 for students © R.I.C. Publications Low resolution display copy 18 Science: A STEM APPROACH YEAR 2 978-1-925431-95-7 R.I.C. Publications® – www.ricpublications.com.au
Biological sciences GROWING AND CHANGING Lesson 5 Lesson plan Introduction: 1. View images of various amphibians. What do you think the word amphibian means? Watch the video at and pause at 0.57, to find out how amphibians start their lives in water and then live on the land. How do you think a frog lives two lives? Do you think a frog looks the same as an adult as it does when it is born? What will it need to live in water? What will it need to live on land? Do they grow and change the same way as the mammals you learnt about in the previous lesson? QP Development 2. As a class, view the rest of the video at . Discuss the different stages viewed. How many stages are there? What does the frog look like? How does it change? Why does it change? PC 3. In pairs, students conduct further research by going to the website at and reading through the information presented on the poster. Advise students to click on the magnifying glass to view the information close up. PC 4. Students individually complete page 20 by illustrating and writing about the changes that a frog goes through. PA C 5. Students find a partner and compare what they have written and drawn, and correct errors. Students may wish to view the website again to clarify any discrepancies between answers. PC PA C Differentiation • Pair less capable students with more capable students to assist with leading the research. Drawings may be used to explain the stages instead of sentences. • More capable students can add more detailed information to page 20 and use labelled diagrams. Reflection: 6. Discuss as a class how the changes that a frog undergoes are different or similar to other animals. Do you think all animals go through the same stages of development? Does a frog offspring look the same at the start of its life as the adult frog? Can you think of any other animals that have offspring that do not look like the adult? C © R.I.C. Publications Low resolution display copy R.I.C. Publications® – www.ricpublications.com.au 978-1-925431-95-7 YEAR Science: 2 A STEM APPROACH 19
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