1. Heredity and reproduction
Grade 2
Big Idea 16: Heredity and Reproduction
TOPIC XIII: The Life Cycles of Plants and Animals

2. Benchmarks 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: Moderate
Big Idea 1:The Practice of Science
SC.2.N.1.2 Compare the observations made by different groups using the same tools. Cognitive Complexity: Moderate
SC.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

3. Lesson 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

4. Life cycle: formative assessment
Pre - assessment for background knowledge

5. Life cycle of plants Plants have different life spans,
but most leave behind seeds for new life
Engage:
Click on each living thing to see the life cycle (interactive)
Click on Discovery Ed. hyperlinked video: Life cycle of plants. Discuss.

6. Life cycle of a sun flower
Explore: Copy this slide for students to cut and put in order.

7. Life cycle of a sun flower
Check your work! 1. 2. 3. 5. 6. 4.
Evaluate: From: A Seed in Need pdf p. 9

8. Seed Poem
Engage: From: A Seed in Need pdf p. 3

9. What do seeds need to grow?
Seeds need: - water - air - proper temperature
Seed Germination
What does a seed
need to grow?
Explore and Explore: Using Trade Books in Science: A Seed in Need
Inside a Seed Activity:
Learn all about seeds!

10. Parts of a seed
Explore/explain: Give students soaked lima beans seed to observe with hand lens. Point out the baby plant and its food storage.

11. Animal Life Cycles
Engage: Click on Discovery Ed. hyperlinked video: Animal Life Cycles to introduce animal life cycles.

12. What 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

13. Life 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

14. Life Cycles of Insects
Animals 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

15. Insect Life Cycle
Most 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 Cycle
Create a foldable:
Pasta Lifecycle:
Use pasta to show the
lifecycle of a butterfly. Use cavatelli for
the caterpillar, small circles for the eggs,
shells for the chrysalis and bow ties for
the butterfly. Glue them onto a piece of
construction paper folded into 4 parts.
Draw arrows to define the stages of the
lifecycle. Have students label each phase

16. Let’s Explore Life Cycles
Explore: have students complete the Discovery Ed. interactive: Life Cycles for Lily Plant and Alligator
Evaluate: 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?

17.
Explore: Click on the link to play games to learn about life cycles.

18. Life cycle: formative assessment
Evaluate: Give it again as a post assessment.