Life Cycles are a 3rd Grade NGSS standard, but are popular topics to teach in younger grades too. I have created resources that are ideal for 2nd and 3rd graders, but could be modified for younger or older students.
This is a perfect topic to cover in the Fall, when all the pumpkin and fall decorations are out, and before Halloween.
Before planning any teaching units, I always like to refer to the NGSS, so that I can focus on concepts, ideas and skills that students need to know and understand.
The Next Generation Science Standards Performance Expectation for this topic is:
3-LS1-1. Develop models to describe that organisms have unique and diverse life cycles but all have in common birth, growth, reproduction, and death.
The Science and Engineering Practice is: Develop models to describe phenomena.
The Cross Cutting Concept is Patterns of change can be used to make predictions.
The Disciplinary Core Idea is Reproduction is essential to the continued existence of every kind of organism. Plants and animals have unique and diverse life cycles.
In more simple terms, when teaching about life cycles in 3rd grade, students should understand that all living things have life cycles, and that life cycles are repeating patterns of birth, growth, reproduction and death. Since life cycles are patterns, they can be predicted, and students should be able to create models to describe the life cycles of various animals and plants.
As with all the lessons on this website, please visit my STEM Voyage Teachers Pay Teachers Store for the full set of resources.
When teaching about life cycles, I always try and find an engage activity, such as watching a cool video.
The video 'Apple Tree Growing From Seed Time-Lapse' gets students thinking about apples and where they come from. I then ask students follow up questions such as 'What is a life cycle?' and 'What are some of the stages in the life cycle of an Apple Tree?' to prompt a class discussion.
Next, I talk to the students about life cycles and that all living things have life cycles. We talk about the different stages of a life cycle, and I ask the students to identify the main parts.
Students understand that life cycles are repeating patterns of birth, growth, reproduction and death.
If life cycles are patterns, then we can predict what the next stage in a life cycle will be and create models of life cycles.
Finally, I end the introduction with a detailed vide of the Life Cycle of An Apple, and ask students to discuss the main parts of the apple life cycle.
In the second lesson on the life cycle of an apple tree, I focus on teaching the students in more detail about each stage in the life cycle. I divide the life cycle into five stages: Seed, Seedling, Adult Tree, Tree with Flower, and Tree with Apple Fruit.
As a class, I go through each of the stages in detail, either on a worksheet or Google Slide, and have students answer questions. By 3rd grade, most students are familiar with the basic life cycle of a plant, but I like to point out a number of things that students often forget. This overlaps with the function of the different parts of a plant, which is a 4th grade standard.
Firstly, that the seed contains food stores and an embryo plant, and that the food stores are use by the plant to grow, before it can start to make it's own food. The germination of a seed will only happen if the seed has the right conditions.
Secondly, the seedlings roots are used to absorb water and minerals from the soil, and anchor the plant in the ground. The shoot pushes up through the soil and grows leaves, so that the plant can start making it's own food using water, light and air.
Thirdly, I stress to the students that only flowers that have been pollinated can grow into fruits. Pollination is the transfer of pollen from flower to flower. Once pollen transfers from one flower to another, and fertilization has occurred, then the ovary swells and a new apple fruit and seeds will develop.
As a final activity, I like to give students the opportunity to create an apple tree life cycle craft. Students create an adorable apple craft and make a model of the life cycle of a apple inside.
For this activity, you will need:a cardstock 'front and back of apple', a paper 'inside of apple', a paper life cycle of an apple, scissors, glue, green, red and brown tissue paper, stapler and optional googly eyes.
I chose to color the apple with glue and tissue paper, but it could easily be completed by painting or coloring instead.
To make the front and back of the apple, cut out the 'front of apple' and 'back of apple' on card.
Tear up small pieces of green, red and brown tissue paper, and glue them to the front and back of the pumpkin. Alternatively, you could use paint instead.
Add some googly eyes for fun!
I hope that your students enjoy making an adorable apple tree life cycle craft. If you would like the full set of resources for this activity, please visit my STEM Voyage TPT Store
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