Science for Grade 3
1 Introduction to Science
1-1 Understanding the Nature of Science
1-2 Importance of Observation and Experimentation
1-3 Scientific Tools and Their Uses
2 Living Things and Their Habitats
2-1 Characteristics of Living Things
2-2 Classification of Living Things (Plants and Animals)
2-3 Habitats and Ecosystems
2-4 Adaptations of Living Things to Their Environment
3 Plants
3-1 Parts of a Plant and Their Functions
3-2 Types of Plants (Flowering and Non-flowering)
3-3 Plant Life Cycles
3-4 Importance of Plants to Living Things
4 Animals
4-1 Animal Classification (Vertebrates and Invertebrates)
4-2 Animal Life Cycles
4-3 Animal Behavior and Adaptations
4-4 Importance of Animals to Ecosystems
5 Human Body
5-1 Basic Parts of the Human Body
5-2 Functions of Major Body Systems (Skeletal, Muscular, Digestive, Respiratory)
5-3 Importance of Healthy Habits
5-4 Safety and First Aid Basics
6 Materials and Their Properties
6-1 Classification of Materials (Solids, Liquids, Gases)
6-2 Properties of Common Materials
6-3 Changes in Materials (Physical and Chemical Changes)
6-4 Recycling and Conservation of Materials
7 Forces and Motion
7-1 Understanding Forces (Push and Pull)
7-2 Types of Motion (Linear, Circular)
7-3 Simple Machines (Lever, Pulley, Inclined Plane)
7-4 Balanced and Unbalanced Forces
8 Energy and Its Forms
8-1 Sources of Energy (Renewable and Non-renewable)
8-2 Forms of Energy (Light, Heat, Sound, Electrical)
8-3 Energy Transformations
8-4 Conservation of Energy
9 Earth and Space
9-1 Structure of the Earth (Crust, Mantle, Core)
9-2 Weather and Climate
9-3 Earth's Resources and Their Uses
9-4 The Solar System and Beyond
10 Environmental Science
10-1 Importance of Biodiversity
10-2 Human Impact on the Environment
10-3 Conservation Efforts and Sustainable Practices
10-4 Global Environmental Issues (Pollution, Climate Change)
Characteristics of Living Things

Characteristics of Living Things

What Makes Something Living?

Living things have special features that help them survive and grow. These features are called characteristics. Let's explore two important characteristics of living things: Growth and Reproduction.

Growth

Growth is when something gets bigger or more complex over time. Living things start small and grow to become bigger and stronger. For example, a baby kitten is very small when it is born, but it grows into a big, strong cat as it gets older.

Think of a tree. When you plant a tiny seed, it starts as a small sprout. As it gets water, sunlight, and nutrients, it grows taller and stronger, eventually becoming a big tree with branches and leaves.

Reproduction

Reproduction is how living things make more of themselves. It's like making a copy of themselves so that their kind can continue to live. For example, a frog lays eggs, and from those eggs, baby frogs are born. These baby frogs grow up and can lay their own eggs, continuing the cycle.

Another example is a flower. Flowers have parts called petals and stamens. When a bee visits a flower, it helps the flower make seeds. These seeds can grow into new flowers, making more flowers of the same kind.

Why Are These Characteristics Important?

Growth and reproduction are important because they help living things survive and thrive. By growing, living things can become stronger and better able to find food and avoid danger. By reproducing, they ensure that their kind continues to exist, even after they are gone.

Conclusion

Living things have special features like growth and reproduction that help them live and thrive. By understanding these characteristics, we can better appreciate the amazing world of living things around us.