Dark matter is composed of particles that do not absorb, reflect, or emit light, so dark matter is material that cannot be observed directly. We know that dark matter exists because of the effect it has on objects that we can observe directly. But what is it? Why do we need to study it? Watch and learn more about the mystery of dark matter detection. | Massachusetts Institute of Technology (MIT)

🧪 Classification of Matter 🧬 Everything around us — the air we breathe, the water we drink, and the metals we use — is made of matter. Matter is anything that has mass and occupies space. It can be classified into Pure Substances and Mixtures. ✨ Pure Substances contain only one type of atom or molecule. They are further divided into: ➡️ Elements – cannot be broken down into simpler substances (e.g., Copper, Oxygen). ➡️ Compounds – made of two or more elements chemically combined (e.g., Water,