In which states can we find matter? Solid Liquid Chemical Gas Physical. What's matter?. How can matter change?. Are these changes physical or chemical? From solid to liquid Changing a liquid from one glass to another Frying an egg From liquid to gas Mixing salt and water Boiling water. How can changes be caused?. What's light?. Properties of light; how is usually matter? Transparent Smooth, reflective surface Rough surface; they reflect light but they don't produce a reflection. What's reflection?.
