Natural Sciences — Grade 9

Cells and Body Systems: From Tiny Building Blocks to a Working You

Your body is made of millions of tiny living parts called cells. These cells work together like a team to keep you alive and healthy.

The Circulatory and Respiratory Systems

Your body needs oxygen to stay alive. Every cell in your body uses oxygen to release energy from food. This process also makes carbon dioxide, which your body must remove.

Reproduction and Digestive Systems: Growing, Nourishing, and Caring for Life

Your body is amazing. It can grow, heal, and make new cells. It also has the ability to create new life. To do all of this, your body needs food, energy, and healthy systems working together.

Revision: Cells and Human Body Systems

This revision unit brings together everything you learned in Term 1 about cells and body systems.

Compounds and Chemical Reactions: How Substances Combine and Change

Everything around us is made of substances. Some substances are simple, made of just one type of atom. Others are more complex, made when different atoms join together. In this unit, you will learn how scientists describe and organise these substances, and what happens when substances change into new substances.

Reactions with Oxygen: Rust, Fire, and the Air We Breathe

Oxygen makes up about 21% of the air around us. It is a very reactive gas. This means oxygen easily combines with other substances to form new products.

Acids, Bases, and Neutralisation

Every day, you use substances that are acids or bases. The lemon in your tea is acidic. The soap you wash with is a base. Understanding these substances helps you make sense of cooking, cleaning, medicine, and even farming.

Revision: Matter and Materials

This revision unit helps you review and practise the key ideas from Term 2. Work through each lesson step by step. Take your time with sections you find difficult.

Forces: Pushes, Pulls, and Invisible Effects

Forces are everywhere. When you kick a ball, open a door, or feel yourself pulled down when you jump, you are experiencing forces.

Electric Cells and Resistance: Making and Controlling Current

Think about switching on a torch or using a TV remote. These devices need electricity, but they are not plugged into the wall. They use cells (often called batteries) to work.

Circuits, Safety, and Electricity Use: Powering Homes Safely

Electricity powers our lights, phones, fridges, and TVs. But it can also be dangerous if we do not understand how to use it safely.

Revision: Energy and Change

This revision unit helps you prepare for your Term 3 assessment. It covers the main ideas from the Energy and Change topic.

Earth Systems and the Lithosphere: A Planet That Works Together

Earth is much more than just rocks and soil. It is a system where land, water, air, and life work together all the time. When scientists talk about a system, they mean parts that are connected and affect each other.

Mining and Mineral Resources: From Rock to Useful Materials

Look around you. The walls of your classroom, the phone in your pocket, the pots in your kitchen, and the wires that bring electricity to your home—all of these come from minerals taken from the ground.

The Atmosphere and the Life Cycle of Stars

Every day you breathe air, feel the warmth of the Sun, and see the sky above you. But have you ever wondered what that air is made of, or why the Sun shines?

Revision: Planet Earth and Beyond

This revision unit helps you review the main ideas from Term 4: Planet Earth and Beyond.