Canadian Curriculum Science Blog (Grades 3–7)
Plants are everywhere around us! 🌳
They grow in forests, gardens, farms, parks, and even inside our homes.
Plants are extremely important because they:
- give us oxygen to breathe 🌬️
- provide food 🍎
- help animals survive 🐦
- clean the air 🌍
- make Earth beautiful 🌸
In this fun science lesson, we’ll explore:
✅ parts of plants
✅ how plants grow
✅ types of plants
✅ why plants are important
✅ how plants help people and the environment
This topic connects closely with the Ontario Grade 3 Science Curriculum: “Growth and Changes in Plants.”
🌱 What Are Plants?
Plants are living organisms that make their own food using sunlight.
Most plants need:
☀️ sunlight
💧 water
🌬️ air
🌱 nutrients from soil
Plants belong to the “Life Systems” science strand in the Canadian elementary curriculum because they are living things that grow and change over time.
🌿 Parts of a Plant
Plants have different parts, and each part performs an important job.
The main plant parts are:
- roots
- stem
- leaves
- flowers
- buds
- seeds
Ontario science curriculum expectations encourage students to identify plant parts and explain how they help plants survive.
🌳 Roots — The Underground Helpers
Roots grow below the soil.
Their jobs are to:
✅ absorb water
✅ collect minerals and nutrients
✅ hold the plant firmly in the ground
Some roots also store food for the plant.
Examples:
🥕 carrot
🍠 sweet potato
Without roots, plants could not survive.
🌿 Stem — The Plant’s Highway
The stem supports the plant and keeps it upright.
Inside the stem are tiny tubes that transport:
💧 water
🌱 minerals
🍃 food
from one part of the plant to another.
Some stems are:
- soft and green
- hard and woody
Trees have very strong stems called:
🌳 trunks
🍃 Leaves — The Food Factories
Leaves are one of the most important parts of a plant.
Leaves use:
☀️ sunlight
💧 water
🌬️ carbon dioxide
to make food through a process called:
🌞 Photosynthesis
During photosynthesis, plants release:
🌬️ oxygen
This oxygen is the air humans and animals breathe.
The Ontario curriculum specifically teaches that most plants get energy from the Sun through photosynthesis.
🌸 Flowers — Reproduction in Plants
Flowers help plants reproduce and create seeds.
Many flowers:
- attract bees 🐝
- attract butterflies 🦋
- produce fruits and seeds
Different flowers come in:
🌈 many colors
👃 different smells
🌸 unique shapes
Pollinators help flowers spread pollen so new plants can grow.
🌱 How Do Plants Grow?
Plants begin their life as:
🌰 seeds
A seed needs:
☀️ sunlight
💧 water
🌬️ air
🌱 soil
to grow into a healthy plant.
The process of a seed growing into a plant is called:
🌱 Germination
During germination:
- the seed absorbs water
- roots begin growing downward
- a tiny stem grows upward
- leaves appear
Students in Canadian science programs often observe seed growth experiments in class.
🌳 Types of Plants
There are many different kinds of plants found around the world.
🌿 Shrubs
Shrubs are:
- small woody plants
- bushy
- have many stems
Example:
🌹 rose bush
Shrubs are smaller than trees but bigger than herbs.
🌱 Herbs
Herbs are:
- small plants
- soft green stems
- short-lived
Examples:
🌿 basil (tulsi)
🌱 mint
🌿 coriander
Many herbs are used:
🍲 in cooking
💊 in medicine
🎃 Trailers
Trailers have weak stems and grow along the ground.
Example:
🎃 pumpkin plant
These plants spread across the soil surface.
🍇 Creepers
Creepers also have weak stems.
They climb using support from:
- walls
- sticks
- fences
- trees
Example:
🍇 grapevine
🌳 Trees
Trees are:
- large plants
- strong trunks
- many branches
Examples:
🌳 maple tree
🌳 pine tree
🌳 banyan tree
Trees can live for many years and grow very tall.
Canada is home to millions of trees and large forests that support wildlife and help clean the air. Government of Canada — Forests and Forestry
🌍 Why Are Plants Important?
Plants are essential for life on Earth.
Plants:
🌬️ produce oxygen
🍎 provide food
🪵 give wood
👕 help make clothing
💊 provide medicines
🌧️ support the water cycle
Plants also help reduce:
- pollution
- soil erosion
- climate change
Many medicines come from plants and herbs.
🍁 Plants in Canada
Canada has many different plant ecosystems including:
🌲 forests
🌾 grasslands
🌿 wetlands
🌸 gardens
Some important Canadian plants include:
🍁 maple trees
🌲 spruce trees
🌳 cedar trees
Plants are also important to many Indigenous communities for:
- medicine
- food
- cultural traditions
The Ontario curriculum encourages students to learn how different cultures and Indigenous peoples use plants for food, medicine, shelter, and clothing.
🌎 Save Trees, Save Earth
Trees are often called:
💚 “The Lungs of Earth”
Trees help:
✅ clean the air
✅ produce oxygen
✅ cool the environment
✅ protect animals
Planting trees helps protect our planet for future generations.
Even small actions help:
🌱 plant a tree
💧 water plants
🚯 avoid pollution
🧠 Quick Recap
✅ Plants are living things
✅ Roots absorb water and minerals
✅ Leaves make food through photosynthesis
✅ Flowers help plants reproduce
✅ Seeds grow through germination
✅ Plants provide oxygen, food, medicine, and shelter
🎥 Watch the Plant Science Video
Want to SEE how plants grow?
Watch our educational science lesson on Sites for Kids and explore learning made fun!
💬 Question for Kids
🌱 If you could grow ANY plant at home…
What would you plant?
Tell us in the comments!
📚 Sources & References
- Ontario Science Curriculum — Growth and Changes in Plants
- TVO Learn Grade 3 Science & Technology
- Government of Canada — Forests and Forestry
- The Power of Plants — Ontario Teacher Resource
- Ontario Curriculum, Grades 1–8: Science and Technology
