Presentation on theme: "Heredity and reproduction"— Presentation transcript:
1Heredity and reproduction Grade 2Big Idea 16: Heredity and ReproductionTOPIC XIII: The Life Cycles of Plants and Animals
2Benchmarks Big Idea 16: Heredity and Reproduction SC.2.L.16.1 Observe and describe major stages in the life cycles of plants and animals, including beans and butterflies. Cognitive Complexity: ModerateBig Idea 1:The Practice of ScienceSC.2.N.1.2 Compare the observations made by different groups using the same tools. Cognitive Complexity: ModerateSC.2.N.1.5 Distinguish between empirical observation (what you see, hear, feel, smell, or taste) and ideas or inferences (what you think). Cognitive Complexity: Moderate
3Lesson Objectives:By the end of this lesson, students should be able to:Observe and identify major parts of a seed.Observe the germination and growth of a bean seed.Observe and measure the bean plant seedling as it grows and changes into an adult plant in terms of stem growth and number of leaves.Explain the major stages of a flowering plant and how it grows and reproduces.Identifies and explains the life cycle of a butterfly, frog, and mealworm.Identifies and explains the life cycle of a bean and peanut.Explain the major stages in an animal’s life, how it grows, and reproduces.Key Vocabulary:life cycle, stages, egg, larva, caterpillar, pupa, adult, young, froglet,germination, temperature, seed, seed coat, food storage, embryo, seedling,flower, fruit
4Life cycle: formative assessment Pre - assessment for background knowledge
5Life cycle of plants Plants have different life spans, but most leave behind seeds for new lifeEngage:Click on each living thing to see the life cycle (interactive)Click on Discovery Ed. hyperlinked video: Life cycle of plants. Discuss.
6Life cycle of a sun flower Explore: Copy this slide for students to cut and put in order.
7Life cycle of a sun flower Check your work!220.127.116.11.6.4.Evaluate: From: A Seed in Need pdf p. 9
9What do seeds need to grow? Seeds need: - water - air - proper temperatureSeed GerminationWhat does a seedneed to grow?Explore and Explore: Using Trade Books in Science: A Seed in NeedInside a Seed Activity:Learn all about seeds!
10Parts of a seedExplore/explain: Give students soaked lima beans seed to observe with hand lens. Point out the baby plant and its food storage.
11Animal Life CyclesEngage: Click on Discovery Ed. hyperlinked video: Animal Life Cycles to introduce animal life cycles.
12What is a life cycle?Every living thing grows through its own life cycle. They give birth to offspring like themselves, who grow, mature, reproduce, and then finally die. Let’s learn more about the life cycles of living things.Explain
13Life Cycles Hunt: Evidence of Life Cycles around You Let’s look at a organisms are at different stages in their life cycle. By observing their current stage, predictions can be made about their next stage of development.Explore and Explain: Click on Discovery Ed. hyperlinked video: Life Cycles Hunt: Evidence of Life Cycles around You
14Life Cycles of InsectsAnimals that change their appearance during growth undergo metamorphosis. That's just a long word meaning "to change shape.“ The change that occurs when an insect egg hatches and grows into an adult is called metamorphosis, meaning to change in form.Click on hyperlink: Life Cycles of Insects
15Insect Life CycleMost insects go through metamorphosis, or changing form, in four stages of development.During the larva stages, insects eat almost constantly.Adult insects lay eggs hidden in various places for protection.Explore and explain: first watch the video: Insect Life CycleCreate a foldable:Pasta Lifecycle:Use pasta to show thelifecycle of a butterfly. Use cavatelli forthe caterpillar, small circles for the eggs,shells for the chrysalis and bow ties forthe butterfly. Glue them onto a piece ofconstruction paper folded into 4 parts.Draw arrows to define the stages of thelifecycle. Have students label each phase
16Let’s Explore Life Cycles Explore: have students complete the Discovery Ed. interactive: Life Cycles for Lily Plant and AlligatorEvaluate: Have students write down their response to What is the same about the life cycle of the lily and the alligator?What is the same about the life cycle of the lily and the alligator?
17Explore: Click on the link to play games to learn about life cycles.
18Life cycle: formative assessment Evaluate: Give it again as a post assessment.