What is coresssing?

What are suveillance vcrs used for? Participants in an experiment are said to be blind if they are uninformed about? What data involves sorting and searching through all investigation daya? Can you put base in a sentence? Is digesting food an example of change of state? How does something heavier than air stay off the ground? Why would a mixture of gases react faster when the volume they occupy is decreased? In science what does the word satellite means? Does a procedure describe equipment and materials used in an experiment? How is baking bread a chemical change? Which would be most likely to be rich in fossils eroding hillsides deserts polar ice caps or bed of former shallow sea? What is Camp Sweeney? Where was Johannes kelper born? What is laboratory science? What is an observesation? What kind of root does green gram have? What is a thun the thun? What does the phrase neap tide mean? Do we have types of validity of a test other than content validity? Needles of early compasses were often constructed of?