What is a conculution?

Why do you use cotton or jute fabrices for cleaning puroposes? What are the ways of getting information? What variable is controlled by an experimenter? What is the 3 branches of science? What tools are used to find the mass of any object or substance? Examples of chemical change 4 examples please? Can ultra-violet light kill germs? What is a dry cleaning machine? Difine bus powered devices in usb system? What was The idea that light can act as packets led to what new field of science? Why is a glass called a glass? Why is important to change only one factor at a time in an investigation? What is the stage between metaphase and anaphase in mitosis? Which liquid is used in an aneroid barometer a mercury b alcohol c none? How do you know the students are acting as scientist? Convert 288 in to feet? How do scientist study science? What is meant by an echo and how it is caused? What provides electromagnetic waves? Is it possible to think of something that has never been thought of before?