What is a bathoscope?

What does 0500 inches mean? What does 0 percent basos blood test mean? How long have glasses exist? Is rubber harmful? Is YouTube a valid source? Basic components of watt-hour meter instruments? What is an inependent variable? What is the chemical name for Mercury? What is another way to say discharged? Why is a control group nessasary in a scientific investigation? What causes matter to go through changes of state? Is 100g 1kg? 26400 feet equals how many miles? Are scientific theories based on scientific evidence? What can lead to Speciation? Is the inland empire above sea level? How much is 20g? What were the nuremburg experiments? How do scientists determine whether to consider something as an organism? How does the force of gravity affect plants and animals?