Combustion means the process of burning, especially a chemical reaction that produces heat and usually light. Imagine a piece of wood placed in a fire. As it reacts with oxygen, it becomes hot, produc...
Have you ever looked at the night sky and seen hundreds of bright lights shining above you? Those bright objects are stars. The word stars usually means the huge, glowing objects found in space. They ...
Have you ever walked through a quiet place filled with trees, birds, and fresh air? You may have called it the woods. The word woods usually means an area covered with many trees. It is often smaller ...
Have you ever seen someone being treated badly again and again? Maybe a student is repeatedly teased at school, or a worker is constantly bothered by someone at work. These actions can be described as...
Have you ever bought something that looked great but worked badly? You might say, “The product was subpar.” The word subpar means something is below the expected or usual standard. For example, if a s...
Have you ever walked through a long hallway at school, a hotel, or an office? That space is usually called a corridor. But English has many other words that can describe a corridor or a similar passag...
Have you ever been in a busy market where people push past you from every side? You may have had to move because someone bumped into you. The word jostle is often used for this kind of crowded movemen...
Have you ever picked up a bag and felt surprised because it was so easy to carry? You might say, “This bag is lightweight.” The word lightweight means something that has little weight and is easy to l...
Have you ever stepped outside on a winter morning and quickly reached for your jacket? You might say, “It is chilly today.” The word chilly means slightly cold or uncomfortably cool. It is often used ...
Have you ever noticed how two things can work better when they are together? For example, a blue shirt may look great with a pair of white shoes. The two items are different, but they look good togeth...
