Download Life cycle

Grade 2
Big Idea 16: Heredity and Reproduction
TOPIC XIII: The Life Cycles of Plants and Animals
Department of Mathematics and Science
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
Department of Mathematics and Science
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
Department of Mathematics and Science
Department of Mathematics and Science
Plants have different life spans,
but most leave behind seeds for new life
Department of Mathematics and Science
Department of Mathematics and Science
Check your work!
1.
4.
2.
5.
3.
6.
Department of Mathematics and Science
Department of Mathematics and Science
Seed Germination
What does a seed
need to grow?
Seeds need:
- water
- air
- proper
temperature
Department of Mathematics and Science
Department of Mathematics and Science
Animal Life Cycles
Department of Mathematics and Science
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.
Department of Mathematics and Science
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.
Department of Mathematics and Science
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.
Department of Mathematics and Science
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.
Department of Mathematics and Science
Let’s Explore Life Cycles
What is the same about the life cycle of the lily and the alligator?
Department of Mathematics and Science
http://www.peepandthebigwideworld.com/games/
roundandround.html
Department of Mathematics and Science
Department of Mathematics and Science