Two of the risk factors for down's syndrome include which of the following?

options
exposure to high temperatures
increased age of female
infectious hepatitis
over exposure to sunlight

The scales shown in the introduction measure mass, or the amount of matter in a particular object. the scientific law of conservation of mass states that matter cannot be created or destroyed during a chemical reaction, but it can change from one form to another. did the simulation support this scientific law? explain why or why not.