What is a collioid?

How large is a square in roofing? Are balloons magnetic? A material that transmits nearly all the light in a ray because it offers little resistance to the light is? Can a moving object have impulse in itself? What are the different things people need to know to create a truly cililized culture? How dishwashers work? What are street signs made of? How does air turn into liquid? What is a fed rate blood test? Why should you use biomass? Four properties of metals? Which is better for keeping food and drinks cool in a picnic cooler. water at 0 degrees or ice at 0 degrees? What is the unbalanced force that slows down sliding desk and moving cars? What are the practicability of evolution? What are 5 types of indirect evidence? Is it true saving water saves energy? Is it true Elicitation can be best described as a guided conversation with a concealed purpose? What types of scientists use a magnifying glass? What are weathered Earth materials are blown away called? Do all phases of matter have a fixed volume?