Baking soda and vinegar lab demo part 2 mass! 7th grade please help!

just watch the video, what does it start with, write that down for each trial, then what does it end with, then starting mass - ending mass is the change mass

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.