1. Explain what matter is and give at least three examples of how we use or encounter matter every day.2. What are the solid, liquid, and gas states of matter? Give one example for each and explain how their particles behave differently.3. Choose one process (melting, freezing, evaporation, condensation, or sublimation) and explain how matter changes during that process. Include an example from real life.
Answer (1)
1. What is matter?Matter is anything that has mass and takes up space. Everything around us — the air we breathe, the water we drink, and the food we eat — is made of matter.Examples of matter in daily life:Water – when we drink or take a bath.Food – everything we eat is made of matter.Books or gadgets – solid objects we use for learning and entertainment.2. What are the solid, liquid, and gas states of matter?SolidExample: RockParticle behavior: Particles are tightly packed and only vibrate in place. Solids keep their shape and volume.LiquidExample: WaterParticle behavior: Particles are close but can slide past one another. Liquids take the shape of their container but keep the same volume.GasExample: AirParticle behavior: Particles are far apart and move freely. Gases take the shape and volume of their container.3. Process: EvaporationEvaporation is the process where a liquid changes into a gas without boiling. It usually happens at the surface of the liquid when it's heated or left exposed.Example:When wet clothes are hung outside on a sunny day, the water evaporates and turns into water vapor, leaving the clothes dry. This is because the sun's heat gives energy to the water particles, allowing them to escape into the air.
