What is uindication?

Why are burning wood and metal rusting classified as chemical change? When two or more waves arrive at the same place at the same time what do they do? What element is a radioactive element? Which of Lamarck's ideas turned out to be true Which turned out to be false? Types of optical disks? WHAT IS THE Typical density of garbage? What happen if you get shag? What is discharge in science? If you have a box of buttons what properties might you use to classify them? How is most of the worlds land used? Are any animals microscopic? Does salt kill bees? How many titans were there? What special attributes did Darwin have that made him a good scientist? 8 babies in the womb at the same time are called? What is 31 degrees centigrade in Fahrenheit? What does the term total refer to? What is balance in science? Is pi a variable? Which type of telescope uses concave mirrors to increase the size of the image being viewed?