Katie did an experiment to find out how long it takes a rubber ball to fall from different heights. She wrote data from the experiment in her lab book:

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation:

b. the carbon cycle ensures living things have a source of hydrogen

cuz he is really really short, assuming an unorthodox and inherently unlucky configuration of elevator buttons…

explanation: