Lesson 4: Healthy Plants Revision Notes
Lesson Objectives
As we look at plants, we'll understand more about what makes them grow strong and healthy. By the end of this lesson, you should be able to:
Grade C: Know the different parts of a plant and their functions. These parts are like different pieces of a puzzle that help a plant live and grow.
Grade B: Describe what materials plants need to grow. Just like you need food and water, plants need certain things to thrive.
Grade A: Explain how plants get these materials. Plants have clever ways to gather what they need from their surroundings.
Parts of a Plant and Their Functions
Flower: The colourful part of the plant that helps make seeds.
Roots: They hold the plant in the ground and take in water and minerals from the soil.
Stem: It keeps the plant standing up and carries water and nutrients to different parts.
Leaf: This part captures sunlight which the plant needs to make its food.
What Do Plants Need to Grow?
Plants don't eat soil; instead, they make their own food. They need:
Water: Taken from the soil by the roots.
Carbon Dioxide: A gas from the air that enters through the leaves.
Sunlight: Captured by the leaves, it provides energy for making food.
How Plants Obtain These Materials
Plants use a process called photosynthesis to make their food:
The roots absorb water and minerals from the soil.
The leaves take in carbon dioxide from the air.
Sunlight provides the energy needed for photosynthesis, which happens in the leaves.
During photosynthesis, plants use the sunlight's energy to turn water and carbon dioxide into food and they release oxygen (the air we breathe) as a part of this process.
Test Yourself
Keywords and Simple Definitions
Photosynthesis: The way plants make their own food using sunlight.
Nutrients: Good things in the soil that plants need to grow, like vitamins for us.
Oxygen: A gas in the air that all living things need to breathe.
Understanding how plants grow and what they need helps us take better care of our environment. It's fascinating to see how these living things are so different from us, yet vital to our world!
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