Introduction – What Are Natural Resources? Natural resources are the gifts of nature that we use in our daily lives—like air, water, soil, forests, minerals, fossil fuels, and sunlight. They
Introduction – What Are Fuels? Fuels are substances that store energy, which is released during combustion to produce heat or power. From the gas that runs cars to the firewood
Introduction – What Is Combustion? Combustion is a chemical reaction that occurs when a substance combines with oxygen and releases energy in the form of heat and light. It’s what
Introduction – Why Should We Care About Air? Air is all around us, even though we can’t see it. Every time we take a breath, we’re taking in a mix
Introduction – Why is Water Called a Universal Solvent? Water is everywhere—flowing in rivers, falling as rain, and even making up a large part of our bodies. But what makes
Introduction – What Makes Metals and Non-Metals Special? Take a look around you—your coins, wires, pans, and even jewelry are made from materials called metals. But what about things like
Introduction – What's Changing and How? Have you ever seen ice melt into water or watched paper burn into ashes? Both are changes—but not the same kind! One is a
Introduction – What Are These Mysterious Substances? Have you ever tasted a lemon and felt your mouth pucker from the sourness? Or touched soap and noticed how slippery it feels?