An independent variable is many things. In math, it is the x axis or something that doesn't depend on anything else, like time. But in an experiment it's the thing that you have control over and can change to see how it effects your results. Hope this helped!
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The great thing about a cruise holiday is that everyone in your party can please themselves yet still have a real holiday together. The kids can make new friends and take part in fun and educational activities during the day, while the adults unwind by the pool, learn a new skill or hit the casino.
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We see an object when light falls on it and gets reflected from its surface and enters our eyes. In a dark room, there is no source of light. no light falls on the surface of objects and we do not see them. This is why we cannot see the objects in a dark room.