Do you think the air close to the ground behaves in the same way as the helium in the balloon when it is warmed up? Why or why not? Support your thinking with evidence from the investigations:
Soap Bubble and Bottle Investigation
Heated Balloon Investigation
plz explain

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.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

idk what the question is about