The Nature of Science – JSS1 Intermediate Science Lesson Note (First Term)

What is science?

Have you ever wondered why the sky is blue? Or why a seed grows into a big tree? When you ask these questions and try to find answers, you are behaving like a scientist!

The Meaning of Science

Science is a way of learning about the world around us. It is the systematic study of living and non-living things in our environment.

To “study systematically” means scientists don’t just guess; they follow a path to find the truth:

1. Observation: Looking closely at things using our eyes, nose, ears, skin, and tongue.
2. Experiment: Carrying out tests to see if our ideas are correct.
3. Conclusion: Deciding what the result of our test means.

In simple words: Science is the tool we use to understand how nature works.

2. Who is a Scientist?

A scientist is someone who studies science. You don’t need a white lab coat to be one! Anyone who is curious, asks questions, and observes nature carefully is practicing science.

Why is science important?

Science is not just a subject we read in books; it is everywhere! It makes our lives easier, healthier, and more exciting.

Importance of Science in Everyday Life

• In Health (Medicine): Science helps doctors find cures for sicknesses. Without science, we wouldn’t have vaccines or medicines like paracetamol to stop pain.
• In Communication: Do you like watching TV or using a mobile phone? Science made it possible for us to talk to people far away and see what is happening across the world.
• In Transportation: Science gave us cars, aeroplanes, and bicycles. Instead of walking for days, we can now travel very fast.
• In Agriculture (Farming): Scientists help farmers grow more food. They create better seeds and fertilizers so that nobody goes hungry.
• At Home: Think about your kitchen. The gas cooker, the refrigerator that keeps food fresh, and even the light bulb in your room are all gifts from science.

The three main branches of science

Science is very big, so we divide it into three main “rooms” or branches. This helps us focus on one thing at a time.

1. Biology (The Study of Life)

Biology is the study of living things. This includes humans, animals, plants, and even tiny germs we cannot see with our naked eyes.

• Example: Learning how our heart beats or how a fish breathes underwater.

2. Chemistry (The Study of Substances)

Chemistry is the study of what things are made of and how they change. It looks at how different materials react when we mix them.

• Example: Understanding how soap removes dirt or why iron nails rust in the rain.

3. Physics (The Study of Matter and Energy)

Physics is the study of how things move and the forces that act on them. It covers things like light, heat, sound, and electricity.

• Example: Learning why a ball falls back to the ground when you throw it up.

Class Activity / Revision Questions

Let’s see how much you have learned! Try to answer these:

1. In your own words, what is Science?
2. Mention three things in your house that were made through the help of science.
3. Which branch of science would you study if you wanted to become a Doctor?
4. Why is observation important to a scientist?

Homework

Go home and look around your compound. List three living things and three non-living things. Which branch of science studies the living things you listed?