What is scascity?

What makes the tone of the passage formal and scientific? Longest color wave lengths? How can you use a lever to lift a rock? What is 0.4 degrees Celsius in Fahrenheit? What is the difference between being objective and being subjective in science? The dip of a unit represents what? How could a hypothesis that is porven to be false lead to new scientitfic investig? What drawback to solar energy is that it is not always? Is bacteria bigger than an elephant? What are examples of formal science? What is the difference between external ventilation and internal ventilation? What do you do if there is an accident in the lab? Do you know anything about science? What is a mixture in which particles eventually separate and settle out is a what? How do fire doors work? How could an architect estimate the mass of a brick wall if each brick in the wall has a mass of 3 kilograms? What is a series of folded membranes that move materials around the cell? Where does hydrosphere get its name from? Scientist have found fossils of the same organism on different continents what does this suggest? What are three common solutes?